CN106556555A - A kind of accurate method for determining Machine-made Sand methylene blue MB values - Google Patents
A kind of accurate method for determining Machine-made Sand methylene blue MB values Download PDFInfo
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- 239000004576 sand Substances 0.000 title claims abstract description 149
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 title claims abstract description 136
- 229960000907 methylthioninium chloride Drugs 0.000 title claims abstract description 136
- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000002245 particle Substances 0.000 claims abstract description 103
- 238000012360 testing method Methods 0.000 claims abstract description 96
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000012153 distilled water Substances 0.000 claims abstract description 44
- 238000003756 stirring Methods 0.000 claims abstract description 35
- 239000002244 precipitate Substances 0.000 claims abstract description 33
- 238000004140 cleaning Methods 0.000 claims abstract description 23
- 239000000203 mixture Substances 0.000 claims abstract description 20
- 239000012530 fluid Substances 0.000 claims abstract description 17
- 238000011109 contamination Methods 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims description 40
- 239000004927 clay Substances 0.000 claims description 36
- 239000000428 dust Substances 0.000 claims description 36
- 239000008187 granular material Substances 0.000 claims description 19
- 239000000725 suspension Substances 0.000 claims description 19
- 230000001186 cumulative effect Effects 0.000 claims description 14
- 239000011521 glass Substances 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 11
- 238000012216 screening Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 208000002173 dizziness Diseases 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 238000009333 weeding Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000004566 building material Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 71
- 239000000523 sample Substances 0.000 description 70
- 238000002474 experimental method Methods 0.000 description 51
- 239000007788 liquid Substances 0.000 description 24
- 238000005259 measurement Methods 0.000 description 19
- 238000004364 calculation method Methods 0.000 description 15
- 238000010276 construction Methods 0.000 description 13
- 239000000470 constituent Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 239000002585 base Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 235000013399 edible fruits Nutrition 0.000 description 5
- 238000011049 filling Methods 0.000 description 5
- 238000011010 flushing procedure Methods 0.000 description 5
- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000007873 sieving Methods 0.000 description 5
- 238000005070 sampling Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910001651 emery Inorganic materials 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000006101 laboratory sample Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- MCPLVIGCWWTHFH-UHFFFAOYSA-L methyl blue Chemical compound [Na+].[Na+].C1=CC(S(=O)(=O)[O-])=CC=C1NC1=CC=C(C(=C2C=CC(C=C2)=[NH+]C=2C=CC(=CC=2)S([O-])(=O)=O)C=2C=CC(NC=3C=CC(=CC=3)S([O-])(=O)=O)=CC=2)C=C1 MCPLVIGCWWTHFH-UHFFFAOYSA-L 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011044 quartzite Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000012086 standard solution Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
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Abstract
The present invention relates to build and building materials technology field, in particular to a kind of accurate method for determining Machine-made Sand methylene blue MB values.Weed out part of the particle diameter more than 2.36mm in Machine-made Sand, the part is cleaned and the cleanout fluid after cleaning is added in part of the particle diameter less than 2.36mm, using the bushing screen of two size fractionateds by the portion screen less than 2.36mm into three parts, sample by weight proportion, distilled water is into test specimen and is stirred for addition, to in the solution after stirring methylene blue solution is added to carry out contamination test again, occurs the volume of the methylene blue solution of record Deca during light blue tinge around precipitate on filter paper to be deposited, the MB values of methylene blue are calculated according to computing formula.The characteristics of measuring method of the present invention has efficient, accurate, the MB values measured more can accurately reflect the composition performance of Machine-made Sand, and the use to Machine-made Sand has good directive function.
Description
Technical field
The present invention relates to build and building materials technology field, in particular to a kind of accurate side for determining Machine-made Sand methylene blue MB values
Method.
Background technology
As Machine-made Sand is in the extensive application of China, the absorption of 75 μm of granules is less than as particle diameter in evaluation Machine-made Sand powder
The index of performance, measurement accuracy and the accuracy of MB values are the important indicators of Machine-made Sand grading evaluation and inspection.MB values are surveyed
It is set for starting to carry out in many field laboratories for a significant index of the performance rating to Machine-made Sand.
China《Building sand》(GB/T 14584-2011) standard, and《Highway engineering is gathered materials testing regulationss》
(JTGE42-2005) a kind of experimental technique of MB values is described, it is widely used by each laboratory at present.But at present in the application
Also due to operating habit custom and laboratory condition etc. occur limiting so that different degrees of error occurs in result of the test.Analysis
Its reason mainly by it is following some：
1) detection sample adopts below 2.36mm granule 200g, due to the granule to MB values contribution maximum be 0.075mm with
Lower granule, may cause the sample for taking to be unable to the particle diameter of the reality of representative sample due to the error for sampling during sampling
It is distributed (particularly fine particle content) and causes test error；
2) error in methylene blue solution adition process：In most laboratory, methylene blue 5ml (or express method) is added
All use pipet, last drop ear washing bulb in pipet is habitually blown to beaker by some experimenters
In, this undoubtedly brings error；The method for also having some experimenters to employ burette addition, due to the easy color of methylene blue
It is very deep, it is difficult to clearly to see concave moon surface clearly, also result in the appearance of some errors；
3) methylene blue consumption is big：The methylene blue solution consumption that code test is adopted is big, for a sand sample
(200g), if MB values are accomplished by the methylene blue for adding 20ml easily 1.0, for some samples of the MB values more than 1.4
Consumption is bigger, and this not only needs substantial amounts of standard solution, and has certain pollution to water and soil after the sample after testing is abandoned
Effect；
4) operation difficulty is big, is compared using pipette, extract 5ml solution laboratory technician's difficulty not abundant enough to many experiences
Greatly, it is difficult to calm in 1min to complete the processes such as draw solution, contamination test.Especially for the very high mechanism of those MB values
Sand, test difficulty are very big.
Based on above-mentioned problem, there is patent to propose a kind of method of new accurate measurement Machine-made Sand methylene blue MB values,
As Patent No. " CN103728300A " entitled " a kind of assay method of Machine-made Sand methylene blue MB values " Chinese invention patent,
The patent provides a kind of method of new measurement mechanism sand methylene blue MB values, sieve pair of the method by setting 0.6mm
Measurement is sieved with sand, and the sand of measurement is divided into two grades, then choose respectively the sand of two grades as measurement sand with
There is measurement error reducing traditional measurement mode in this.The method substitutes existing skill by using syringe with a scale
The pipet of art avoids the error problem present in pipetting processes.The method is grasped by way of gradually substep is added
Make, reduce the weight of sample, reduce the consumption of methylene blue, it is to avoid the environment that addition excessive methylene blue is caused is dirty
Dye.
But the method also be present：
1st, MB values are for evaluating how particle diameter in emery dust material, less than the index of the absorption property of 75 μm of granules, is accurately surveyed
Little particle in amount emery dust material is the problem for needing to solve.With gradually decreasing for natural river sand resource, the application of Machine-made Sand is got over
Come more extensive.And the fine particle in Machine-made Sand less than 75 μm is mainly by the non-clay class mineral composition of some inertia, to MB values
Contribution it is less.Therefore in process of the test, some nonstandard operations can also cause result of the test error bigger.GB/T14684-
2011《Construction sand》Determine in the method for MB values, sampling first has the uneven of each grade；Next more than 2.36mm granule
Surface may be attached with some clays because of rainwater or other natural causes, these clays by screening be can not sieve any more
Go, and clay can be very big for the impact of MB values.The patent only carries out drying with sand to measurement and screens out, it is more likely that
There are many little particles to stick on bulky grain, such processing mode can cause measurement result less than normal, there is very big error；
2nd, really can by measurement sand is divided into two particle diameters (more than 0.6mm and less than 0.6mm) to a certain extent
The enough weight for reducing measurement sand, reduces the consumption of methylene blue, but the weight that the method is used is still excessive, methylene blue
Yet suffer from the excessive problem of consumption；
3rd, there are operating difficultiess using syringe addition methylene blue solution with a scale, in addition the mistake of syringe
Difference is difficult to ensure that, can cause serious error to whole measurement result, affect the accuracy of measurement.
The content of the invention
Present invention aim to solve the deficiency of above-mentioned background technology, there is provided a kind of accurate measure Machine-made Sand methylene blue
The method of MB values.
The technical scheme is that：A kind of accurate method for determining Machine-made Sand methylene blue MB values, it is characterised in that：To choosing
The experimental machine sand for taking is dried, and in weeding out Machine-made Sand, particle diameter carries out cleaning and incites somebody to action more than the part of 2.36mm to the part
The dust of the clay being attached on the Partial Mechanism sand and particle diameter less than 75 μm is rinsed to cleanout fluid, then cleanout fluid is added to
During particle diameter is less than the part of 2.36mm, the bushing screen after freeze-day with constant temperature using at least two size fractionateds is less than 2.36mm's to particle diameter
Part is sieved, and is sampled and is mixed and be formed uniformly test specimen by weight proportion from each grade part of screening,
Distilled water is into test specimen and is stirred for addition, then in the solution after stirring adds methylene blue solution, using filter paper
Suspension to being added with the test specimen mixture of methylene blue solution carries out contamination test, to be deposited heavy on filter paper
Occur the volume of the methylene blue solution of record Deca during light blue tinge around starch, the MB of methylene blue is calculated according to formula
Value.
Further comprise the following steps：
1), take the Machine-made Sand no less than 600g to dry to constant weight, Machine-made Sand is sieved using the sieve of 2.36mm, on sieve
Part a is cleaned, and be will be attached to sieve the dust of clay and particle diameter on the Machine-made Sand in a of part less than 75 μm and is rinsed to clear
In washing liquid, cleanout fluid is mixed with lower part of screen point b, the lower part of screen point b to being mixed with cleanout fluid is dried to constant weight to be obtained
To drying sample；
2) sample screening will be dried using the bushing screen of at least two size fractionateds, according to part by weight respectively to each grade
Part is sampled, and the part of acquirement is stirred to form test specimen；
3) distilled water is added in test specimen, and which is sufficiently stirred, until test specimen is complete with distilled water
Full mix homogeneously；
4), continue to be stirred test specimen, and it is molten with Deca methylene blue in the mixture of distilled water to test specimen
Liquid, takes the hanging drop in the mixture of a drop test specimen, distilled water and methylene blue solution on filter paper, to be deposited in filter
Occurs the volume of the methylene blue solution of record Deca during light blue tinge around precipitate on paper；
5), according to formula：
Wherein：Methylene blue MB values (g/kg) of MB --- Machine-made Sand；
V --- add the cumulative volume (mL) of methylene blue solution；
The weight (g) of G --- test specimen；
10 is conversion coefficient；
The methylene blue MB values of the Machine-made Sand are calculated, and which is contrasted with GB, judge whether the Machine-made Sand meets
Require.
In further described step 1, on cleaning screen, the method for part a is：Sieve upper part a is placed in beaker, to burning
Add distilled water in cup, be stirred well to mix homogeneously, make the dust of the clay and particle diameter that are attached on Machine-made Sand less than 75 μm
Decoupling mechanism sand surface, with the strainer filtering that mesh diameter is 1.5～2.36mm, after having filtered, using distilled water on filter screen
Part be rinsed, clay and particle diameter then will be mixed with filter screen and be poured into lower part of screen less than the cleanout fluid of 75 μm of dust
Divide in b, complete cleaning step.
Further described step 2 using the method for two kinds of grade sieves screening drying samples is：Using 0.6m and
Drying sample sifter is divided into bulky grain m of the particle diameter more than 0.6mm by the bushing screen screening drying sample of 0.15mmOn, particle diameter is in 0.6mm
Middle granule m between～0.15mmInLittle particle m of 0.15mm is less than with particle diameterUnder, take according to part by weight
In further described step 4, in test specimen, the method for addition methylene blue solution is：Dripped using alkali formula
Fixed tube adds 3 to drip methylene blue solution in the mixture to the test specimen for stirring with distilled water, then with 400r/min's
After speed stirring 1min, dipped using Glass rod outstanding in the mixture of a drop test specimen, distilled water and methylene blue solution
Supernatant liquid is dripped on filter paper, if be deposited on around the precipitate on filter paper there is not light blue tinge, repeat the above steps, until
Occur the light blue tinge of about 1mm around precipitate, continue stirring, test is once infected with every 1min, if tinge exists
Disappear in 4min, in suspension, add 1 to drip methylene blue solution, after stirring 1min, proceed contamination test, until final color
It is dizzy to continue 5min, then record the cumulative volume V of final methylene blue solution used.
Advantages of the present invention has：1st, the present invention is cleaned by the part to particle diameter in Machine-made Sand more than 2.36mm, and
The liquid of cleaning is mixed with subsequent experimental with sand, it is ensured that granule part of all of particle diameter less than 75 μm in Machine-made Sand
Measure more accurate completely into the MB values in test specimen, making experiment, the experimental result for obtaining more accurately can reflect
The composition of Machine-made Sand, has to production and preferably instructs effect；
2nd, the present invention makes the grade of test specimen choose more smart by lower part of screen to be divided to the screening for carrying out two kinds of grades
Really, the weight for choosing laboratory sample is reduced, reduce the consumption of methylene blue solution that experiment is used, it is to avoid excessive Asia
The problem of environmental pollution that methyl blue solution is caused；
3rd, the present invention carries out the addition of methylene blue solution using base buret, and titration process is more accurate, and operation is more
For convenience, be conducive to improving the efficiency and process of experiment.
The characteristics of measuring method protected by the present invention has efficient, accurate, the MB values measured can be more accurate
The composition performance for reflecting Machine-made Sand, the use to Machine-made Sand has good directive function, and this experimental technique also fills in addition
Divide the problem that take into account environmental pollution, by the usage amount for reducing methylene blue solution, reduce the pollution to environment.
Description of the drawings
Specific embodiment
With reference to specific embodiment, the present invention is described in further detail.
According to GB/T14684-2011《Construction sand》In sampling method be sampled Machine-made Sand, according to GB/T
14584-2011《Construction sand》In standard, 7.5 chapters determine its MB value.
Embodiment 1：The machine made granite sand that In Fujian Province is chosen according to GB is sample, and the sample of 600g is put into (100
5) DEG C dry to constant weight in ± drying baker, the sample after drying is sieved using the sieve of 2.36mm, sieved and be
Particle diameter divides b less than the lower part of screen of 2.36mm more than part a on the sieve of 2.36mm and particle diameter, wherein the upper part a of sieve is 155.44g,
Lower part of screen point b is 444.56g.
Sieve upper part a is placed in container, adding a small amount of distilled water (100ml) part a upper to sieve in container is carried out
Cleaning, is sufficiently stirred for sieving part a and distilled water, and the clay and particle diameter that will be attached to sieve on the Machine-made Sand in a of part is less than
75 μm of dust granules are washed off, are made the dust of clay and particle diameter less than 75 μm depart from the surface of the Partial Mechanism sand, are reused net
Bore dia is that the filter screen of 1.5～2.36mm is filtered to which, the part on filter screen is rinsed with a small amount of distilled water, will
Liquid after flushing is mixed to form cleanout fluid with the part under filter screen, the cleaning liquid part that then will be rinsed in the way of toppling over
It is poured in the b of lower part of screen point, it is ensured that be attached on sieve dust of the clay and particle diameter in a of part on Machine-made Sand less than 75 μm complete
Enter in the b of lower part of screen point, then the lower part of screen point b to adding cleaning liquid is dried, and is formed drying sample, is dried sample
Product are weighed as 449.38g.
Sieve to drying sample, sieved to drying sample using bushing screen of the aperture for 0.15mm and 0.6mm, will
Drying sample sifter is divided into three parts, including particle diameter is more than the bulky grain (143.80g) of 0.6mm, particle diameter and is located at 0.6mm and 0.15mm
Between middle granule (184.25g) and particle diameter less than 0.15mm little particle (121.33g), proportionally weigh the test of 30g
Sample, is weighed respectively：
For 9.6g,
For 12.3g,
For 8.1g；
The test specimen of 30g altogether.
The test specimen of 30g is poured in the beaker for filling (100 ± 1) g distilled water, with the speed of (600 ± 60) r/min
Degree stirring 5min, is then stirred to off-test with the speed of (400 ± 40) r/min.
3 drop methylene blue solutions are added in beaker with base buret, using turbine stirrer with (400 ± 40) r/
After the speed stirring 1min of min, dipped in the mixture of a drop test specimen, distilled water and methylene blue solution with Glass rod
Suspension (taken hanging drop should make precipitate diameter in 8mm～12mm), and dropped on filter paper, if being deposited on filter paper
On precipitate around there is not tinge, then drop methylene blue solution of plus 3 continues with 400 the speed stirring 1min of ± 40) r/min,
A drop suspension (taken hanging drop should make precipitate diameter in 8mm～12mm) is dipped with Glass rod again, is dripped on filter paper,
If not occurring tinge around precipitate yet, repeatedly aforesaid operations, until there are the light blue tinges of about 1mm around precipitate, then
Stop stirring, and test is once infected with every 1min, if tinge disappears in 4min, add 1 to drip methylene in suspension
Blue solution, after stirring 1min, proceeds contamination test, until final tinge can continue 5min.Off-test, and read drop
Reading on fixed tube, the cumulative volume V of the final methylene blue solution used of record, is 2.25ml.
According to formula：
Wherein：Methylene blue MB values (g/kg) of MB --- Machine-made Sand；
V --- add the cumulative volume (mL) of methylene blue solution；
The weight (g) of G --- test specimen；
10 is conversion coefficient；
The MB values of the methylene blue of the Machine-made Sand are calculated, the MB values for obtaining the methylene blue of the Machine-made Sand of this experiment are
0.75g/kg, less than GB/T14584-2011《Construction sand》The 1.4 of 7.5 chapters regulation in standard, it was demonstrated that the sample is qualified.
Four repetitions are carried out using same Machine-made Sand sample to test, the volume respectively 2.22ml of the methylene blue solution for using,
2.28ml, 2.20ml and 2.26ml, according to formula calculate methylene blue MB refer to respectively 0.74g/kg, 0.76g/kg,
0.73g/kg and 0.75g/kg.
Choose with area with the Machine-made Sand sample of batch according to GB/T14584-2011《Construction sand》In standard in 7.5.3
Experimental technique carry out control experiment, carry out 5 experiments respectively, the volume of the methylene blue solution that experimental result is used is respectively
14.42ml, 14.25ml, 13.69ml, 13.87ml and 13.43ml, are respectively according to the methylene blue MB values that formula is calculated
0.72g/kg, 0.71g/kg, 0.68g/kg, 0.69g/kg and 0.67g/kg.
The result of calculation of result of calculation and the controlled trial of the present invention is contrasted and is understood, the experimental technique of GB record
Need to expend substantial amounts of methylene blue solution, be 7 times or so of experimental technique of the invention, so many methylene blue solution is such as
Fruit can cause the pollution of environment without directly discharge is processed, further, since the present invention has fully taken into account particle diameter more than 2.6mm
Machine-made Sand in be attached with the part of some clays and particle diameter less than 75 μm, and this part be added to into particle diameter be less than
In the Machine-made Sand part of 2.36mm, the result of experiment is made more to embody the constituent structure of whole Machine-made Sand.Due to methylene blue it is molten
Dust of the liquid MB values by clay and particle diameter less than 75 μm is affected very big, Dust Capacity of the clay and particle diameter in Machine-made Sand less than 75 μm
Bigger, the MB values of the Machine-made Sand for measuring will be bigger, therefore, the MB values of the experimental technique measurement that the present invention is used are adopted than GB
Method value of calculation it is larger, be capable of the actual constituent structure of more accurate reactive machanism sand, have for actually used
Effect is instructed preferably.
Embodiment 2：The volcanic rock Machine-made Sand that Kenny's subregion is chosen according to GB is sample, and the sample of 600g is put into
Dry to constant weight in the drying baker of (100 ± 5) DEG C, the sample after drying is sieved using the sieve of 2.36mm, sieved
It is divided into particle diameter and divides b less than the lower part of screen of 2.36mm more than part a on the sieve of 2.36mm and particle diameter, wherein the upper part a of sieve is
191.68g, lower part of screen point b are 408.32g.
Sieve upper part a is placed in container, adding a small amount of distilled water (100ml) part a upper to sieve in container is carried out
Cleaning, is sufficiently stirred for sieving part a and distilled water, and the clay and particle diameter that will be attached to sieve on the Machine-made Sand in a of part is less than
75 μm of dust granules are washed off, are made the dust of clay and particle diameter less than 75 μm depart from the surface of the Partial Mechanism sand, are reused net
Bore dia is that the filter screen of 1.5～2.36mm is filtered to which, the part on filter screen is rinsed with a small amount of distilled water, will
Liquid after flushing is mixed to form cleanout fluid with the part under filter screen, the cleaning liquid part that then will be rinsed in the way of toppling over
It is poured in the b of lower part of screen point, it is ensured that be attached on sieve dust of the clay and particle diameter in a of part on Machine-made Sand less than 75 μm complete
Enter in the b of lower part of screen point, then the lower part of screen point b to adding cleaning liquid is dried, and is formed drying sample, is dried sample
Product are weighed as 412.70g.
Sieve to drying sample, sieved to drying sample using bushing screen of the aperture for 0.15mm and 0.6mm, will
Drying sample sifter is divided into three parts, including particle diameter is more than the bulky grain (111.43g) of 0.6mm, particle diameter and is located at 0.6mm and 0.15mm
Between middle granule (148.57g) and particle diameter less than 0.15mm little particle (152.70g), proportionally weigh the test of 30g
Sample, is weighed respectively：
For 8.1g,
For 10.8g,
For 11.1g；
The test specimen of 30g altogether.
The test specimen of 30g is poured in the beaker for filling (100 ± 1) g distilled water, with the speed of (600 ± 60) r/min
Degree stirring 5min, is then stirred to off-test with the speed of (400 ± 40) r/min.
3 drop methylene blue solutions are added in beaker with base buret, using turbine stirrer with (400 ± 40) r/
After the speed stirring 1min of min, dipped in the mixture of a drop test specimen, distilled water and methylene blue solution with Glass rod
Suspension (taken hanging drop should make precipitate diameter in 8mm～12mm), and dropped on filter paper, if being deposited on filter paper
On precipitate around there is not tinge, then drop methylene blue solution of plus 3 continues with 400 the speed stirring 1min of ± 40) r/min,
A drop suspension (taken hanging drop should make precipitate diameter in 8mm～12mm) is dipped with Glass rod again, is dripped on filter paper,
If not occurring tinge around precipitate yet, repeatedly aforesaid operations, until there are the light blue tinges of about 1mm around precipitate, then
Stop stirring, and test is once infected with every 1min, if tinge disappears in 4min, add 1 to drip methylene in suspension
Blue solution, after stirring 1min, proceeds contamination test, until final tinge can continue 5min.Off-test, and read drop
Reading on fixed tube, the cumulative volume V of the final methylene blue solution used of record, is 1.14ml.
According to formula：
Wherein：Methylene blue MB values (g/kg) of MB --- Machine-made Sand；
V --- add the cumulative volume (mL) of methylene blue solution；
The weight (g) of G --- test specimen；
10 is conversion coefficient；
The MB values of the methylene blue of the Machine-made Sand are calculated, the MB values for obtaining the methylene blue of the Machine-made Sand of this experiment are
0.38g/kg, less than GB/T14584-2011《Construction sand》The 1.4 of 7.5 chapters regulation in standard, it was demonstrated that the sample is qualified.
Four repetitions are carried out using same Machine-made Sand sample to test, the volume respectively 1.17ml of the methylene blue solution for using,
1.26ml, 0.93ml and 1.05ml, according to formula calculate methylene blue MB refer to respectively 0.39g/kg, 0.42g/kg,
0.31g/kg and 0.35g/kg.
Choose with area with the Machine-made Sand sample of batch according to GB/T14584-2011《Construction sand》In standard in 7.5.3
Experimental technique carry out control experiment, carry out 5 experiments respectively, the volume of the methylene blue solution that experimental result is used is respectively
6.41ml, 6.68ml, 6.56ml, 5.84ml and 6.26ml, the methylene blue MB values respectively 0.32g/kg calculated according to formula,
0.33g/kg, 0.33g/kg, 0.29g/kg and 0.31g/kg.
The result of calculation of result of calculation and the controlled trial of the present invention is contrasted and is understood, the experimental technique of GB record
Need to expend substantial amounts of methylene blue solution, be 5 times or so of experimental technique of the invention, so many methylene blue solution is such as
Fruit can cause the pollution of environment without directly discharge is processed, further, since the present invention has fully taken into account particle diameter more than 2.6mm
Machine-made Sand in be attached with the part of some clays and particle diameter less than 75 μm, and this part be added to into particle diameter be less than
In the Machine-made Sand part of 2.36mm, the result of experiment is made more to embody the constituent structure of whole Machine-made Sand.Due to methylene blue it is molten
Dust of the liquid MB values by clay and particle diameter less than 75 μm is affected very big, Dust Capacity of the clay and particle diameter in Machine-made Sand less than 75 μm
Bigger, the MB values of the Machine-made Sand for measuring will be bigger, therefore, the MB values of the experimental technique measurement that the present invention is used are adopted than GB
Method value of calculation it is larger, be capable of the actual constituent structure of more accurate reactive machanism sand, have for actually used
Effect is instructed preferably.
Embodiment 3：The basalt Machine-made Sand that In Nanjing is chosen according to GB is sample, and the sample of 600g is put into (100
5) DEG C dry to constant weight in ± drying baker, the sample after drying is sieved using the sieve of 2.36mm, sieved and be
Particle diameter divides b less than the lower part of screen of 2.36mm more than part a on the sieve of 2.36mm and particle diameter, wherein the upper part a of sieve is 107.33g,
Lower part of screen point b is 492.67g.
Sieve upper part a is placed in container, adding a small amount of distilled water (100ml) part a upper to sieve in container is carried out
Cleaning, is sufficiently stirred for sieving part a and distilled water, and the clay and particle diameter that will be attached to sieve on the Machine-made Sand in a of part is less than
75 μm of dust granules are washed off, are made the dust of clay and particle diameter less than 75 μm depart from the surface of the Partial Mechanism sand, are reused net
Bore dia is that the filter screen of 1.5～2.36mm is filtered to which, the part on filter screen is rinsed with a small amount of distilled water, will
Liquid after flushing is mixed to form cleanout fluid with the part under filter screen, the cleaning liquid part that then will be rinsed in the way of toppling over
It is poured in the b of lower part of screen point, it is ensured that be attached on sieve dust of the clay and particle diameter in a of part on Machine-made Sand less than 75 μm complete
Enter in the b of lower part of screen point, then the lower part of screen point b to adding cleaning liquid is dried, and is formed drying sample, is dried sample
Product are weighed as 496.19g.
Sieve to drying sample, sieved to drying sample using bushing screen of the aperture for 0.15mm and 0.6mm, will
Drying sample sifter is divided into three parts, including particle diameter is more than the bulky grain (238.17g) of 0.6mm, particle diameter and is located at 0.6mm and 0.15mm
Between middle granule (153.82g) and particle diameter less than 0.15mm little particle (104.20g), proportionally weigh the test of 30g
Sample, is weighed respectively：
For 14.4g,
For 9.3g,
For 6.3g；
The test specimen of 30g altogether.
The test specimen of 30g is poured in the beaker for filling (100 ± 1) g distilled water, with the speed of (600 ± 60) r/min
Degree stirring 5min, is then stirred to off-test with the speed of (400 ± 40) r/min.
3 drop methylene blue solutions are added in beaker with base buret, using turbine stirrer with (400 ± 40) r/
After the speed stirring 1min of min, dipped in the mixture of a drop test specimen, distilled water and methylene blue solution with Glass rod
Suspension (taken hanging drop should make precipitate diameter in 8mm～12mm), and dropped on filter paper, if being deposited on filter paper
On precipitate around there is not tinge, then drop methylene blue solution of plus 3 continues with 400 the speed stirring 1min of ± 40) r/min,
A drop suspension (taken hanging drop should make precipitate diameter in 8mm～12mm) is dipped with Glass rod again, is dripped on filter paper,
If not occurring tinge around precipitate yet, repeatedly aforesaid operations, until there are the light blue tinges of about 1mm around precipitate, then
Stop stirring, and test is once infected with every 1min, if tinge disappears in 4min, add 1 to drip methylene in suspension
Blue solution, after stirring 1min, proceeds contamination test, until final tinge can continue 5min.Off-test, and read drop
Reading on fixed tube, the cumulative volume V of the final methylene blue solution used of record, is 2.97ml.
According to formula：
Wherein：Methylene blue MB values (g/kg) of MB --- Machine-made Sand；
V --- add the cumulative volume (mL) of methylene blue solution；
The weight (g) of G --- test specimen；
10 is conversion coefficient；
The MB values of the methylene blue of the Machine-made Sand are calculated, the MB values for obtaining the methylene blue of the Machine-made Sand of this experiment are
0.99g/kg, less than GB/T14584-2011《Construction sand》The 1.4 of 7.5 chapters regulation in standard, it was demonstrated that the sample is qualified.
Four repetitions are carried out using same Machine-made Sand sample to test, the volume respectively 3.03ml of the methylene blue solution for using,
3.09ml, 2.91ml and 2.94ml, according to formula calculate methylene blue MB refer to respectively 1.01g/kg, 1.03g/kg,
0.97g/kg and 0.98g/kg.
Choose with area with the Machine-made Sand sample of batch according to GB/T14584-2011《Construction sand》In standard in 7.5.3
Experimental technique carry out control experiment, carry out 5 experiments respectively, the volume of the methylene blue solution that experimental result is used is respectively
17.45ml, 18.48ml, 17.83ml, 18.81ml and 18.29ml, are respectively according to the methylene blue MB values that formula is calculated
0.87g/kg, 0.92g/kg, 0.89g/kg, 0.94g/kg and 0.91g/kg.
The result of calculation of result of calculation and the controlled trial of the present invention is contrasted and is understood, the experimental technique of GB record
Need to expend substantial amounts of methylene blue solution, be 6 times or so of experimental technique of the invention, so many methylene blue solution is such as
Fruit can cause the pollution of environment without directly discharge is processed, further, since the present invention has fully taken into account particle diameter more than 2.6mm
Machine-made Sand in be attached with the part of some clays and particle diameter less than 75 μm, and this part be added to into particle diameter be less than
In the Machine-made Sand part of 2.36mm, the result of experiment is made more to embody the constituent structure of whole Machine-made Sand.Due to methylene blue it is molten
Dust of the liquid MB values by clay and particle diameter less than 75 μm is affected very big, Dust Capacity of the clay and particle diameter in Machine-made Sand less than 75 μm
Bigger, the MB values of the Machine-made Sand for measuring will be bigger, therefore, the MB values of the experimental technique measurement that the present invention is used are adopted than GB
Method value of calculation it is larger, be capable of the actual constituent structure of more accurate reactive machanism sand, have for actually used
Effect is instructed preferably.
Embodiment 4：The limestone machine-made sand that Guiyang Region is chosen according to GB is sample, and the sample of 600g is put into (100
5) DEG C dry to constant weight in ± drying baker, the sample after drying is sieved using the sieve of 2.36mm, sieved and be
Particle diameter divides b less than the lower part of screen of 2.36mm more than part a on the sieve of 2.36mm and particle diameter, wherein the upper part a of sieve is 71.13g, sieve
Lower part b is 528.87g.
Sieve upper part a is placed in container, adding a small amount of distilled water (100ml) part a upper to sieve in container is carried out
Cleaning, is sufficiently stirred for sieving part a and distilled water, and the clay and particle diameter that will be attached to sieve on the Machine-made Sand in a of part is less than
75 μm of dust granules are washed off, are made the dust of clay and particle diameter less than 75 μm depart from the surface of the Partial Mechanism sand, are reused net
Bore dia is that the filter screen of 1.5～2.36mm is filtered to which, the part on filter screen is rinsed with a small amount of distilled water, will
Liquid after flushing is mixed to form cleanout fluid with the part under filter screen, the cleaning liquid part that then will be rinsed in the way of toppling over
It is poured in the b of lower part of screen point, it is ensured that be attached on sieve dust of the clay and particle diameter in a of part on Machine-made Sand less than 75 μm complete
Enter in the b of lower part of screen point, then the lower part of screen point b to adding cleaning liquid is dried, and is formed drying sample, is dried sample
Product are weighed as 531.75g.
Sieve to drying sample, sieved to drying sample using bushing screen of the aperture for 0.15mm and 0.6mm, will
Drying sample sifter is divided into three parts, including particle diameter is more than the bulky grain (116.99g) of 0.6mm, particle diameter and is located at 0.6mm and 0.15mm
Between middle granule (180.80g) and particle diameter less than 0.15mm little particle (233.97g), proportionally weigh the test of 30g
Sample, is weighed respectively：
For 6.6g,
For 10.2g,
For 13.2g；
The test specimen of 30g altogether.
The test specimen of 30g is poured in the beaker for filling (100 ± 1) g distilled water, with the speed of (600 ± 60) r/min
Degree stirring 5min, is then stirred to off-test with the speed of (400 ± 40) r/min.
3 drop methylene blue solutions are added in beaker with base buret, using turbine stirrer with (400 ± 40) r/
After the speed stirring 1min of min, dipped in the mixture of a drop test specimen, distilled water and methylene blue solution with Glass rod
Suspension (taken hanging drop should make precipitate diameter in 8mm～12mm), and dropped on filter paper, if being deposited on filter paper
On precipitate around there is not tinge, then drop methylene blue solution of plus 3 continues with 400 the speed stirring 1min of ± 40) r/min,
A drop suspension (taken hanging drop should make precipitate diameter in 8mm～12mm) is dipped with Glass rod again, is dripped on filter paper,
If not occurring tinge around precipitate yet, repeatedly aforesaid operations, until there are the light blue tinges of about 1mm around precipitate, then
Stop stirring, and test is once infected with every 1min, if tinge disappears in 4min, add 1 to drip methylene in suspension
Blue solution, after stirring 1min, proceeds contamination test, until final tinge can continue 5min.Off-test, and read drop
Reading on fixed tube, the cumulative volume V of the final methylene blue solution used of record, is 0.63ml.
According to formula：
Wherein：Methylene blue MB values (g/kg) of MB --- Machine-made Sand；
V --- add the cumulative volume (mL) of methylene blue solution；
The weight (g) of G --- test specimen；
10 is conversion coefficient；
The MB values of the methylene blue of the Machine-made Sand are calculated, the MB values for obtaining the methylene blue of the Machine-made Sand of this experiment are
0.21g/kg, less than GB/T14584-2011《Construction sand》The 1.4 of 7.5 chapters regulation in standard, it was demonstrated that the sample is qualified.
Four repetitions are carried out using same Machine-made Sand sample to test, the volume respectively 0.72ml of the methylene blue solution for using,
0.69ml, 0.57ml and 0.60ml, according to formula calculate methylene blue MB refer to respectively 0.24g/kg, 0.23g/kg,
0.19g/kg and 0.20g/kg.
Choose with area with the Machine-made Sand sample of batch according to GB/T14584-2011《Construction sand》In standard in 7.5.3
Experimental technique carry out control experiment, carry out 5 experiments respectively, the volume of the methylene blue solution that experimental result is used is respectively
3.65ml, 3.45ml, 3.86ml, 3.09ml and 3.87ml, the methylene blue MB values respectively 0.18g/kg calculated according to formula,
0.17g/kg, 0.19g/kg, 0.15g/kg and 0.19g/kg.
The result of calculation of result of calculation and the controlled trial of the present invention is contrasted and is understood, the experimental technique of GB record
Need to expend substantial amounts of methylene blue solution, be 6 times or so of experimental technique of the invention, so many methylene blue solution is such as
Fruit can cause the pollution of environment without directly discharge is processed, further, since the present invention has fully taken into account particle diameter more than 2.6mm
Machine-made Sand in be attached with the part of some clays and particle diameter less than 75 μm, and this part be added to into particle diameter be less than
In the Machine-made Sand part of 2.36mm, the result of experiment is made more to embody the constituent structure of whole Machine-made Sand.Due to methylene blue it is molten
Dust of the liquid MB values by clay and particle diameter less than 75 μm is affected very big, Dust Capacity of the clay and particle diameter in Machine-made Sand less than 75 μm
Bigger, the MB values of the Machine-made Sand for measuring will be bigger, therefore, the MB values of the experimental technique measurement that the present invention is used are adopted than GB
Method value of calculation it is larger, be capable of the actual constituent structure of more accurate reactive machanism sand, have for actually used
Effect is instructed preferably.
Embodiment 5：It is sample that In Guangzhou Area quartzite Machine-made Sand is chosen according to GB, the sample of 600g is put into (100 ±
DEG C 5) dry to constant weight in drying baker, the sample after drying is sieved using the sieve of 2.36mm, sieved as grain
B is divided less than the lower part of screen of 2.36mm more than part a on the sieve of 2.36mm and particle diameter in footpath, wherein the upper part a of sieve is 125.49g, sieve
Lower part b is 474.51g.
Sieve upper part a is placed in container, adding a small amount of distilled water (100ml) part a upper to sieve in container is carried out
Cleaning, is sufficiently stirred for sieving part a and distilled water, and the clay and particle diameter that will be attached to sieve on the Machine-made Sand in a of part is less than
75 μm of dust granules are washed off, are made the dust of clay and particle diameter less than 75 μm depart from the surface of the Partial Mechanism sand, are reused net
Bore dia is that the filter screen of 1.5～2.36mm is filtered to which, the part on filter screen is rinsed with a small amount of distilled water, will
Liquid after flushing is mixed to form cleanout fluid with the part under filter screen, the cleaning liquid part that then will be rinsed in the way of toppling over
It is poured in the b of lower part of screen point, it is ensured that be attached on sieve dust of the clay and particle diameter in a of part on Machine-made Sand less than 75 μm complete
Enter in the b of lower part of screen point, then the lower part of screen point b to adding cleaning liquid is dried, and is formed drying sample, is dried sample
Product are weighed as 479.09g.
Sieve to drying sample, sieved to drying sample using bushing screen of the aperture for 0.15mm and 0.6mm, will
Drying sample sifter is divided into three parts, including particle diameter is more than the bulky grain (196.43g) of 0.6mm, particle diameter and is located at 0.6mm and 0.15mm
Between middle granule (148.52g) and particle diameter less than 0.15mm little particle (134.15g), proportionally weigh the test of 30g
Sample, is weighed respectively：
For 12.3g,
For 9.3g,
For 8.4g；
The test specimen of 30g altogether.
The test specimen of 30g is poured in the beaker for filling (100 ± 1) g distilled water, with the speed of (600 ± 60) r/min
Degree stirring 5min, is then stirred to off-test with the speed of (400 ± 40) r/min.
3 drop methylene blue solutions are added in beaker with base buret, using turbine stirrer with (400 ± 40) r/
After the speed stirring 1min of min, dipped in the mixture of a drop test specimen, distilled water and methylene blue solution with Glass rod
Suspension (taken hanging drop should make precipitate diameter in 8mm～12mm), and dropped on filter paper, if being deposited on filter paper
On precipitate around there is not tinge, then drop methylene blue solution of plus 3 continues with 400 the speed stirring 1min of ± 40) r/min,
A drop suspension (taken hanging drop should make precipitate diameter in 8mm～12mm) is dipped with Glass rod again, is dripped on filter paper,
If not occurring tinge around precipitate yet, repeatedly aforesaid operations, until there are the light blue tinges of about 1mm around precipitate, then
Stop stirring, and test is once infected with every 1min, if tinge disappears in 4min, add 1 to drip methylene in suspension
Blue solution, after stirring 1min, proceeds contamination test, until final tinge can continue 5min.Off-test, and read drop
Reading on fixed tube, the cumulative volume V of the final methylene blue solution used of record, is 4.56ml.
According to formula：
Wherein：Methylene blue MB values (g/kg) of MB --- Machine-made Sand；
V --- add the cumulative volume (mL) of methylene blue solution；
The weight (g) of G --- test specimen；
10 is conversion coefficient；
The MB values of the methylene blue of the Machine-made Sand are calculated, the MB values for obtaining the methylene blue of the Machine-made Sand of this experiment are
1.52g/kg, more than GB/T14584-2011《Construction sand》The 1.4 of 7.5 chapters regulation in standard, it was demonstrated that the sample is unqualified
's.Four repetitions are carried out using same Machine-made Sand sample to test, the volume respectively 4.59ml of the methylene blue solution for using,
4.53ml, 4.47ml and 4.62ml, according to formula calculate methylene blue MB refer to respectively 1.53g/kg, 1.51g/kg,
1.49g/kg and 1.54g/kg.
Choose with area with the Machine-made Sand sample of batch according to GB/T14584-2011《Construction sand》In standard in 7.5.3
Experimental technique carry out control experiment, carry out 5 experiments respectively, the volume of the methylene blue solution that experimental result is used is respectively
28.66ml, 29.23ml, 27.85ml, 27.64ml and 30.12ml, are respectively according to the methylene blue MB values that formula is calculated
1.43g/kg, 1.46g/kg, 1.39g/kg, 1.38g/kg and 1.51g/kg.
The result of calculation of result of calculation and the controlled trial of the present invention is contrasted and is understood, the experimental technique of GB record
Need to expend substantial amounts of methylene blue solution, be 7 times or so of experimental technique of the invention, so many methylene blue solution is such as
Fruit can cause the pollution of environment without directly discharge is processed, further, since the present invention has fully taken into account particle diameter more than 2.6mm
Machine-made Sand in be attached with the part of some clays and particle diameter less than 75 μm, and this part be added to into particle diameter be less than
In the Machine-made Sand part of 2.36mm, the result of experiment is made more to embody the constituent structure of whole Machine-made Sand.Due to methylene blue it is molten
Dust of the liquid MB values by clay and particle diameter less than 75 μm is affected very big, Dust Capacity of the clay and particle diameter in Machine-made Sand less than 75 μm
Bigger, the MB values of the Machine-made Sand for measuring will be bigger, therefore, the MB values of the experimental technique measurement that the present invention is used are adopted than GB
Method value of calculation it is larger, be capable of the actual constituent structure of more accurate reactive machanism sand, have for actually used
Effect is instructed preferably.
From the point of view of the control experiment of the present embodiment, the MB values calculated according to the experimental technique of GB have less than 1.4g/kg's
Experiment value, it is single from from the point of view of data, illustrate this batch Machine-made Sand be it is qualified, but as control experiment does not consider
The clay adhered to on Machine-made Sand of the particle diameter more than 2.36mm and particle diameter cause this result to go out less than the impact of 75 μm of dust
Existing deviation, when actually used, if produced according to this result, can undoubtedly produce very big problem, accordingly, with respect to state
For the experimental technique of labelling record, the experimental technique of the present invention is capable of the constituent structure of more accurate reactive machanism sand.
Ultimate principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel it should be appreciated that the present invention is not restricted to the described embodiments, the simply explanation described in above-described embodiment and description this
The principle of invention, of the invention without departing from the spirit and scope of the present invention also to have various changes and modifications, these changes
Change and improvement is both fallen within scope of the claimed invention.The claimed scope of the invention by appending claims and its
Equivalent is defined.
Claims (5)
1. it is a kind of it is accurate determine Machine-made Sand methylene blue MB values method, it is characterised in that：Experimental machine sand to choosing is carried out
Drying, in weeding out Machine-made Sand, particle diameter carries out cleaning and will be attached on the Partial Mechanism sand more than the part of 2.36mm to the part
Clay and particle diameter rinse to cleanout fluid less than 75 μm of dust, then cleanout fluid is added to into part of the particle diameter less than 2.36mm
In, the part after freeze-day with constant temperature using the bushing screen of at least two size fractionateds to particle diameter less than 2.36mm is sieved, by weight
Ratio from each grade part of screening is sampled and is mixed and is formed uniformly test specimen, and addition distilled water is to test specimen
In and be stirred, then add methylene blue solution in the solution after stirring, using filter paper to being added with methylene blue solution
Test specimen mixture in suspension carry out contamination test, there is light blue color around the precipitate on filter paper to be deposited
The volume of the methylene blue solution of Deca is recorded when dizzy, the MB values of methylene blue are calculated according to formula.
2. a kind of accurate method for determining Machine-made Sand methylene blue MB values as claimed in claim 1, it is characterised in that：Including following
Step：
1), take the Machine-made Sand no less than 600g to dry to constant weight, Machine-made Sand is sieved using the sieve of 2.36mm, to the upper part of sieve
A is cleaned, and be will be attached to sieve the dust of clay and particle diameter on the Machine-made Sand in a of part less than 75 μm and is rinsed to cleanout fluid
It is interior, then cleanout fluid is mixed with lower part of screen point b, the lower part of screen point b to being mixed with cleanout fluid is dried to constant weight to be obtained
Drying sample；
2) sample screening will be dried using the bushing screen of at least two size fractionateds, according to part by weight respectively to each grade part
It is sampled, the part of acquirement is stirred to form test specimen；
3) distilled water is added in test specimen, and which is sufficiently stirred, until test specimen is mixed completely with distilled water
Close uniform；
4), continue to be stirred test specimen, and to Deca methylene blue solution in mixture of the test specimen with distilled water, take
Hanging drop in the mixture of one drop test specimen, distilled water and methylene blue solution is on filter paper, to be deposited on filter paper
Precipitate around record when there is light blue tinge Deca methylene blue solution volume；
5), according to formula：
Wherein：Methylene blue MB values (g/kg) of MB --- Machine-made Sand；
V --- add the cumulative volume (mL) of methylene blue solution；
The weight (g) of G --- test specimen；
10 is conversion coefficient；
The methylene blue MB values of the Machine-made Sand are calculated, and which is contrasted with GB, judge whether the Machine-made Sand meets the requirements.
3. a kind of accurate method for determining Machine-made Sand methylene blue MB values as claimed in claim 2, it is characterised in that：Described step
In rapid 1, on cleaning screen, the method for part a is：Sieve upper part a is placed in beaker, is added distilled water in beaker, is sufficiently stirred for
To mix homogeneously, the dust decoupling mechanism sand surface of the clay and particle diameter that are attached on Machine-made Sand less than 75 μm is made, it is straight with mesh
Footpath is the strainer filtering of 1.5～2.36mm, after having filtered, the part on filter screen is rinsed using distilled water, then will filter
Clay and the particle diameter of being mixed with off the net is poured in the b of lower part of screen point less than the cleanout fluid of 75 μm of dust, completes cleaning step.
4. a kind of accurate method for determining Machine-made Sand methylene blue MB values as claimed in claim 2, it is characterised in that：Described step
Rapid 2 using the method for two kinds of grade sieve screening drying samples are：Using the bushing screen screening drying sample of 0.6m and 0.15mm, will
Drying sample sifter is divided into bulky grain m of the particle diameter more than 0.6mmOn, middle granule m of the particle diameter between 0.6mm～0.15mmInAnd particle diameter
Less than little particle m of 0.15mmUnder, take according to part by weight
Test specimen.
5. a kind of accurate method for determining Machine-made Sand methylene blue MB values as claimed in claim 2, it is characterised in that：Described step
In rapid 4, in test specimen, the method for addition methylene blue solution is：Using base buret to the test specimen for stirring
Methylene blue solutions are dripped with addition in the mixture of distilled water 3, then stirred after 1min, using Glass rod with the speed of 400r/min
The hanging drop in the mixture of a drop test specimen, distilled water and methylene blue solution is dipped on filter paper, if being deposited on filter
Do not occur light blue tinge around precipitate on paper, then repeat the above steps, until there is the light blue of about 1mm around precipitate
Color tinge, continues stirring, is once infected with test every 1min, if tinge disappears in 4min, adds 1 to drip in suspension
Methylene blue solution, after stirring 1min, proceeds contamination test, until final tinge can continue 5min, then records final
The cumulative volume V of methylene blue solution used.
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| CN109187381A (en) * | 2018-08-01 | 2019-01-11 | 中建西部建设西南有限公司 | A kind of method of quick measurement Machine-made Sand MB value |
| CN111562194A (en) * | 2020-05-19 | 2020-08-21 | 中交第四航务工程局有限公司 | Quick test method for MB value of machine-made sand |
| CN111751239A (en) * | 2020-02-24 | 2020-10-09 | 安吉龙港混凝土制品有限公司 | Method for judging stone powder content in artificial sand and mixed sand |
| CN112129883A (en) * | 2019-06-24 | 2020-12-25 | 亚东预拌混凝土股份有限公司 | Methylene blue fast screening detection method for sand and stone fine granule material |
| CN112595709A (en) * | 2020-10-27 | 2021-04-02 | 重庆建工建材物流有限公司 | Automatic device and method for machine-made sand methylene blue test |
| CN112946170A (en) * | 2020-12-23 | 2021-06-11 | 中山艾尚智同信息科技有限公司 | Method for measuring mud content of machine-made sand for building |
| CN113848185A (en) * | 2021-09-30 | 2021-12-28 | 中建西部建设建材科学研究院有限公司 | Sand MB value testing system and method |
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| CN112129883A (en) * | 2019-06-24 | 2020-12-25 | 亚东预拌混凝土股份有限公司 | Methylene blue fast screening detection method for sand and stone fine granule material |
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| CN111562194A (en) * | 2020-05-19 | 2020-08-21 | 中交第四航务工程局有限公司 | Quick test method for MB value of machine-made sand |
| CN111562194B (en) * | 2020-05-19 | 2022-03-18 | 中交第四航务工程局有限公司 | Quick test method for MB value of machine-made sand |
| CN112595709A (en) * | 2020-10-27 | 2021-04-02 | 重庆建工建材物流有限公司 | Automatic device and method for machine-made sand methylene blue test |
| CN112946170A (en) * | 2020-12-23 | 2021-06-11 | 中山艾尚智同信息科技有限公司 | Method for measuring mud content of machine-made sand for building |
| CN113848185A (en) * | 2021-09-30 | 2021-12-28 | 中建西部建设建材科学研究院有限公司 | Sand MB value testing system and method |
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