CN110333316A - One kind is for judging gather materials containing the slate active concrete microtrabeculae test specimen of alkali_silica reaction and its preparation and application - Google Patents
One kind is for judging gather materials containing the slate active concrete microtrabeculae test specimen of alkali_silica reaction and its preparation and application Download PDFInfo
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- G—PHYSICS
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention discloses one kind for judging gather materials containing the slate active concrete microtrabeculae test specimen of alkali_silica reaction and its preparation and application, using base-material containing slate to be measured as raw material, successively through broken, cement mixing, aqueous slkali molding, it conserves and concrete microtrabeculae test specimen is made, suitable for concrete microtrabeculae method quickly measure containing slate gather materials whether have the active method of alkali_silica reaction, when use, under high-temperature and high-pressure conditions, after being conserved using potassium hydroxide-sodium hydroxide solution as conditioning solutions agent, detect its expansion rate, fast testing plate rock can be achieved and gather materials whether there is the reactivity of alkali silicic acid, test period is only 3 days.
Description
Technical field
The invention belongs to the field of building materials, are that a kind of alkali_silica reaction that is used to judge to gather materials containing slate is living specifically
The concrete microtrabeculae test specimen and its preparation and application of property.
Background technique
Areal geology will is saved according to Guizhou In China, the rock of Area of Southeast Guizhou is mainly upper member of about 7.6-10 100000000 years away from the present
Banxi Group, the lower reaches of the Changjiang River continent Qun Hedan group's sandy slate, sericite slate, blastopsammite and the relict tufa stone of the lower part Gu Jie (Pt31)
The product for belonging to different Sedimentary Facies bands Deng, Banxi Group, the lower reaches of the Changjiang River continent Qun Hedan group respectively represents Yangtze paleo-plate edge difference
Position Activity Type Sedimentary Assemblages, overall thickness reach 3500-10000m.Preliminary studies have shown that the rocks such as region sandstone, the slate have
There is alkali_silica reaction active.With alkali_silica reaction it is active gather materials there is a possibility that concrete occur alkali_silica reaction destroy, shadow
Ring the service life of engineering structure.Although alkali is called the cancer of concrete, but can make to live by technical measures
Property is gathered materials does not generate harm in concrete.Concrete, large dosage mineral admixture and the chemical admixture of low alkali are to press down at present
The main and effective means of alkaline silica reaction (ASR).For example Portuguese Pieterfontein(is built in nineteen sixty-eight) and
RoodeElsburg(is built in nineteen sixty-eight) arch dam has used has the active quartzy sandstone of alkali_silica reaction, due in cement plus
Entered 50% and 44% slag, 1985 and 1986 to dam body carry out alkali special project examine discovery not yet by
Alkali influences.China is completed I grades of power stations of Yalongjiang River silk screen of world's highest (305m) come into operation and
Also using having the active sandstone of alkali_silica reaction and slate, they are mixed by limitation in two river mouth power station of Yalongjiang River in construction
Solidifying soil alkali content controls the expansion of activated flux PAW welding alkali_silica reaction with enough flyash is added.
In conclusion needing to unite under Proterozoic erathem on the southeast of Guizhou Province to improve the safety of Area of Southeast Guizhou cement concrete
Sandstone, slate alkali_silica reaction living features conduct a research, and according to alkali_silica reaction properties study alkali_silica reaction press down
Measure processed and evaluation concrete alkali silica reaction service life；Need the grain composition to sandstone, slate rubble and Machine-made Sand, granulated
Shape and content of stone powder optimisation technique are studied, to improve the working performance of concrete；Need to study sandstone, slate concrete is received
Compression deformation control technology reduces or prevents Shrinkage Cracking of Concrete, and then reduces the leakage in tunnel.Related ends are removed in the southeast of Guizhou Province
Outside regional engineer application, other similar engineering project can also be applied to.
Method currently used for alkali_silica reaction activity identification mainly has lithofacies method, quick mortar bars method, concrete prism
Body method.Wherein lithofacies method can only be described whether there is or not potential activity component and its distribution situation, without can determine that whether there is alkali silicic acid
Reactivity；Quick mortar bars method and concrete prism test can not also quick and precisely determine the alkali_silica reaction to gather materials activity,
Determine that the result most fast test period is 18 days, the effect of monitoring, existing patent document are unable to reach in engineering practice of construction
A kind of aggregate quality evaluating method based on sandstone of CN106251247(, 2016.12.21) in record press DL/
T5151-2014 " concrete for hydraulic structure sandstone aggregate testing regulations " requires the basic active of identification alkali-silica reaction class aggregate, test
Period at least needs 14-28 days.In addition to this, the research of concrete alkali silica reaction activity aspect mainly uses concrete sample
In 40 DEG C of steam curing half a year to 1 year age, such long-time cannot be waited at all in practical projects.For this purpose, how fast
The alkali_silica reaction activity of speed identification concrete is the emphasis of current concrete works research.
Summary of the invention
The purpose of the present invention is to provide one kind for judging the active concrete microtrabeculae of alkali_silica reaction that gathers materials containing slate
Test specimen is successively made through broken, cement mixing, aqueous slkali molding, maintenance, is suitable for using base-material containing slate to be measured as raw material
Concrete microtrabeculae method quickly measure containing slate gather materials in whether have the active method of alkali_silica reaction.
Another object of the present invention is to provide one kind for judging the active concrete of alkali_silica reaction that gathers materials containing slate
The preparation method of microtrabeculae test specimen is obtained after cement mixing, aqueous slkali molding, maintenance by broken obtained rubble and Machine-made Sand,
Preparation method is simple.
The purpose of the present invention is to provide one kind for judging the active concrete microtrabeculae of alkali_silica reaction that gathers materials containing slate
The application method of test specimen is conserved under high-temperature and high-pressure conditions using potassium hydroxide-sodium hydroxide solution as conditioning solutions agent
Afterwards, its expansion rate is detected, it can be achieved that whether fast testing plate rock gathers materials has the reactivity of alkali silicic acid, and the test period is only 3
It.
The present invention is achieved through the following technical solutions: one kind is for judging the active coagulation of alkali_silica reaction that gathers materials containing slate
Native microtrabeculae test specimen, the concrete microtrabeculae test specimen are to use aqueous slkali by aggregate crusher containing slate to be detected and after cement is added
It forms and concrete microtrabeculae is made, then obtained through conserving, the size of the concrete microtrabeculae is 40mm × 40mm × 160mm.
It is described to be detected to gather materials and be mainly made of mica, crystallite feldspar and crystallite quartz containing slate.
The concentration of the aqueous slkali is 1-2mol/L.
The maintenance is to conserve concrete microtrabeculae for 24 hours at 18-22 DEG C.
A kind of preparation method for the active concrete microtrabeculae test specimen of alkali_silica reaction that judges to gather materials containing slate, including with
Lower step:
(1) rubble and Machine-made Sand is made in aggregate crusher containing slate to be detected；
(2) cement is added after mixing rubble and Machine-made Sand, then is formed with aqueous slkali and concrete microtrabeculae is made；
(3) concrete microtrabeculae is conserved and concrete microtrabeculae test specimen is made.
In the step (1), the partial size of rubble is 5-10mm, and the partial size of Machine-made Sand is 0.08-5mm.
In the step (2), by rubble: Machine-made Sand=6:4 volume ratio is uniform by rubble, Machine-made Sand and cement mixing.
A kind of application method for the active concrete microtrabeculae test specimen of alkali_silica reaction that judges to gather materials containing slate, will be described
Concrete microtrabeculae test specimen is placed in potassium hydroxide-sodium hydroxide solution, is supported at a temperature of 0.2-2.15Mpa pressure, 120-216 DEG C
After protecting 6-12h, the expansion rate of the concrete microtrabeculae test specimen is detected, if expansion rate >=0.1%, judges that this contains slate and gather materials and has
Alkali_silica reaction activity；If expansion rate < 0.1%, judge this contain slate gather materials not have alkali_silica reaction activity.
The concrete microtrabeculae test specimen is boiled after boiling 6h in water, is conserved with potassium hydroxide-sodium hydroxide solution.
For the concrete microtrabeculae test piece maintenance in potassium hydroxide-sodium hydroxide solution that concentration is 1-2mol/L, this is mixed
Solidifying soil microtrabeculae test specimen and potassium hydroxide-sodium hydroxide solution fixing fabric structure are in 1:(4-8).
Detect the expansion rate of the concrete microtrabeculae test specimen the following steps are included:
(1) the prepackage test ailhead on concrete microtrabeculae；
(2) length of the concrete microtrabeculae after measurement maintenance, is denoted as initial length L0；
(3) length of the concrete microtrabeculae test specimen after measurement maintenance, is denoted as length Lt；
(4) the expansion rate P of concrete microtrabeculae test specimen is calculatedt:。
Compared with prior art, the present invention have the following advantages that and the utility model has the advantages that
(1) the present invention provides one kind gathers materials the active concrete microtrabeculae test specimen of alkali_silica reaction for quickly detecting containing slate,
The concrete microtrabeculae test specimen using base-material containing slate to be measured as raw material, successively through broken, cement mixing, aqueous slkali molding, maintenance and
It is made, using potassium hydroxide-sodium hydroxide as conditioning solutions, under high-temperature and high-pressure conditions, can quickly detect its expansion rate, try
Testing the period is only 3 days, far below existing mortar bars method, the detection duration of concrete prism method.
(2) concrete microtrabeculae test specimen of the present invention when in use, using potassium hydroxide-sodium hydroxide not with slate collection
In material crystallite quartz effect expansion, by it is to be detected containing slate gather materials preparation concrete microtrabeculae test specimen boil 6h after, in 0.2-
2.15Mpa pressure conserves 6-12h at a temperature of 120-216 DEG C, can be quickly obtained identification by the expansion for accelerating reaction to generate and become
The alkali_silica reaction activity that matter rock gathers materials.
(3) concrete microtrabeculae test specimen of the present invention when in use, uses concentration for potassium hydroxide-hydrogen of 1-2mol/L
Sodium hydroxide solution is as conditioning solutions, which belongs to highly basic, and pH value > 13 are nontoxic and free from environmental pollution, and room temperature can store,
Its is soluble easily in water, and consistent with the alkali composition in cement.
(4) cement stability pressure steaming kettle can be used in high-temperature and high-pressure conditions of the present invention, is held in kettle with stainless steel
Device dress concrete microtrabeculae test specimen and conditioning solutions are tested, easy to use, and are more advantageous to the control of experimentation cost.
(5) application method of the present invention is experiments verify that consistent with accelerated motar-bar test result, with concrete half a year
Age result is consistent, determines that slate alkali_silica reaction activity provides good approach to be quick.
Detailed description of the invention
The XRD diagram of Fig. 1 prosperity stock ground block stone.
Fig. 2 curing time gathers materials influence (2922.5 mortar of TB/T of alkali_silica reaction activity expansion rate to prosperous slate
Stick express method).
Fig. 3 curing time gathers materials to prosperous slate, and (concrete microtrabeculae quickly tries for the influence of alkali_silica reaction activity expansion rate
Proved recipe method)
Fig. 4 solid-to-liquid ratio gathers materials the influence of alkali_silica reaction activity expansion rate to prosperous slate.
Fig. 5 curing temperature gathers materials the influence of alkali_silica reaction activity expansion rate to prosperous slate.
Fig. 6 contain hair, it is auspicious in, Kingsoft, prosperity, river valley, hair arch bridge, stonemason's punching and the stockaded village Wu Jia stock ground block stone, rubble and sand
2922.5 mortar specimen 14d expansion rate of TB/T.
Fig. 7 contain hair, it is auspicious in, Kingsoft, prosperity, river valley, hair arch bridge, stonemason's punching and the stockaded village Wu Jia stock ground block stone, rubble and sand
Concrete microtrabeculae test specimen 8h maximum swelling rate.
Specific embodiment
The present invention is described in further detail below with reference to embodiment, embodiments of the present invention are not limited thereto.
Embodiment 1:
The present embodiment proposes a kind of for judging the active concrete microtrabeculae test specimen of alkali_silica reaction that gathers materials containing slate.
The 20kg(that gathers materials to be detected containing slate is taken mainly to be made of mica, crystallite feldspar and crystallite quartz), pass through jaw
Crusher is processed, and obtains rubble and Machine-made Sand requirement all passes through 10mm sieve, the rubble for sifting out 5kg is spare, remaining sample
Product, which continue to use jaw crusher and are machined to gained Machine-made Sand sample, can be transferred through the sieve of 5mm, sift out mechanism using vibrating screen
Sand gradation is 5-2.5mm:2.5-1.25mm:1.25-0.6mm:0.6-0.3mm:0.3-0.15mm=99:247.5:247.5:
247.5:148.5.
In the present embodiment, molding is 600g, partial size 10mm with rubble quality；Molding Machine-made Sand quality 400g, partial size
For 5mm.
Take above-mentioned molding rubble, molding Machine-made Sand by 6:4 volume ratio and cement (440kg/m3) after mixing,
It forms to obtain having a size of 40mm × 40mm × 160mm concrete microtrabeculae, opposite two with the aqueous slkali that concentration is 1mol/L
The center in a face 40mm × 40mm, which is placed, surveys long ailhead (two ailhead length are 5mm).
Above-mentioned concrete microtrabeculae is put into 20 ± 2 DEG C of standard curing box and is conserved for 24 hours, concrete microtrabeculae test specimen is made.
Embodiment 2:
The present embodiment proposes a kind of for judging the active concrete microtrabeculae test specimen of alkali_silica reaction that gathers materials containing slate.
The 20kg(that gathers materials to be detected containing slate is taken mainly to be made of mica, crystallite feldspar and crystallite quartz), pass through jaw
Crusher is processed, and obtains rubble and Machine-made Sand requirement all passes through 8mm sieve, the rubble for sifting out 5kg is spare, remaining sample
It continues to use jaw crusher and is machined to gained Machine-made Sand sample and can be transferred through the sieve of 5mm, sift out Machine-made Sand using vibrating screen
Gradation is 5-2.5mm:2.5-1.25mm:1.25-0.6mm:0.6-0.3mm:0.3-0.15mm=99:247.5:247.5:
247.5:148.5.
In the present embodiment, molding is 600g, partial size 8mm with rubble quality；Molding Machine-made Sand quality 400g, partial size are
1.25mm。
Take above-mentioned molding rubble, molding Machine-made Sand by 6:4 volume ratio and cement (440kg/m3) after mixing,
It forms to obtain having a size of 40mm × 40mm × 160mm concrete microtrabeculae, opposite two with the aqueous slkali that concentration is 1mol/L
The center in a face 40mm × 40mm, which is placed, surveys long ailhead (two ailhead length are 5mm).
Above-mentioned concrete microtrabeculae is put into 20 ± 2 DEG C of standard curing box and is conserved for 24 hours, concrete microtrabeculae test specimen is made.
Embodiment 3:
The present embodiment proposes a kind of for judging the active concrete microtrabeculae test specimen of alkali_silica reaction that gathers materials containing slate.
The 20kg(that gathers materials to be detected containing slate is taken mainly to be made of mica, crystallite feldspar and crystallite quartz), pass through jaw
Crusher is processed, and obtains rubble and Machine-made Sand requirement all passes through 5mm sieve, the rubble for sifting out 5kg is spare, remaining sample
It continues to use jaw crusher and is machined to gained Machine-made Sand sample and can be transferred through the sieve of 2.5mm, sift out mechanism using vibrating screen
Sand gradation is 8mm=99 2.5mm:2.5-1.25mm:1.25-0.6mm:0.6-0.3mm:0.3-0.15mm:0.3-0.0:
247.5:247.5:247.5:148.5.
In the present embodiment, molding is 600g, partial size 5mm with rubble quality；Molding Machine-made Sand quality 400g, partial size are
0.08mm。
Take above-mentioned molding rubble, molding Machine-made Sand by 6:4 volume ratio and cement (440kg/m3) after mixing,
It forms to obtain having a size of 40mm × 40mm × 160mm concrete microtrabeculae, opposite two with the aqueous slkali that concentration is 1mol/L
The center in a face 40mm × 40mm, which is placed, surveys long ailhead (two ailhead length are 5mm).
Above-mentioned concrete microtrabeculae is put into 20 ± 2 DEG C of standard curing box and is conserved for 24 hours, concrete microtrabeculae test specimen is made.
Embodiment 4:
The present embodiment proposes a kind of use for the active concrete microtrabeculae test specimen of alkali_silica reaction that judges to gather materials containing slate
Method.
The following steps are included:
A) selection of conditioning solutions:
Select potassium hydroxide-sodium hydroxide solution that concentration is 1mol/L as conditioning solutions.
B) preparation of concrete microtrabeculae test specimen:
Referring to process described in embodiment 1, the concrete microtrabeculae test specimen being prepared is plucked after drying surface moisture after grinding with thousand points
Ruler measures its length, is denoted as initial length L0。
C) potassium hydroxide-sodium hydroxide solution maintenance:
Above-mentioned concrete microtrabeculae test specimen is placed in boiling in 100 DEG C of boiling tanks and boils 6h, the cooling pressure that is placed on is taken out and steams in kettle, control pressure
Steaming concrete microtrabeculae test specimen and potassium hydroxide-sodium hydroxide solution volume in kettle is 1:5, is conserved at 0.2Mpa, 180 DEG C
10h。
Concrete microtrabeculae test specimen after maintenance is taken out together with maintenance container and is cooled to 20 ± 2 DEG C, then uses water again
The moisture that surface is dried after flushing concrete microtrabeculae test specimen, measures its length Lt with micrometer, each concrete microtrabeculae expansion rate takes 3
The average value of root test specimen is as experimental result.
D) calculating of expansion rate:
(1) calculates the expansion rate of concrete microtrabeculae as the following formula:
(1)
In formula: PtExpansion rate of-concrete microtrabeculae the test piece maintenance after t hours, %；
LtLength after the maintenance of-concrete microtrabeculae t hours, mm；
L0The first length of-concrete microtrabeculae, mm.
Note: the relative position of rock column and micrometer should be kept as far as possible constant when measurement concrete pillar length.
E) judgement of reactivity:
The expansion rate of concrete microtrabeculae test specimen is calculated by the above process, if expansion rate >=0.1%, judges that this contains slate collection
Material has alkali_silica reaction activity；If expansion rate < 0.1%, judge this contain slate gather materials not have alkali_silica reaction activity.
Embodiment 5:
The present embodiment the difference from embodiment 1 is that: in step c), control pressure steam kettle pressure is 2.15Mpa, temperature 150
DEG C, conserve 8h.
Referring to step described in embodiment 1, the present embodiment potassium hydroxide and sodium hydroxide reagent are that chemical analysis is pure.Cement
For 52.5 portland cement of P I of Jiangnan little Ye Tian Cement Co., Ltd production.Test takes the Guizhou Province southeast of Guizhou Province with slate rock
State Rongjiang County prosperity stock ground (prosperous block stone), number XW-1, XW-2, XWL-3 and XW-4, chemical composition are shown in Table 1.Fig. 1 is
The XRD spectrum of slate sample, each sample is mainly made of mica, quartz and feldspar as can be seen from Figure 1, contains a small amount of calcite
And chlorite.
The chemical composition that 1 Kingsoft of table, prosperity, river valley and stonemason's slug field gather materials
As shown in Fig. 2, being respectively by the 2922.5 mortar specimen 14d expansion rate of TB/T that XW-1, XW-2, XW-3 and XW-4 are prepared
0.295%, 0.284%, 0.257% and 0.185%.XW-1, XW-2 and XW-3 mortar specimen 14d expansion rate are all larger than TB/T
Threshold value 0.20% as defined in 2922.5 has alkali_silica reaction activity.XW-4 mortar specimen 14d expansion rate is less than less than 0.20%
Threshold value as defined in TB/T 2922.5 does not have ASR activity.
As shown in Figure 3, it is conserved under the conditions of 150 DEG C by the concrete microtrabeculae test specimen that XW-1, XW-2, XW-3 and XW-4 are prepared
Expansion rate when 1-10h all increases with the extension of curing age, and expansion rate is with the curing age rule of development and TB/T
The expansion rate of 2922.5 mortar specimens is almost the same, and expansion rate when 8h is respectively 0.120%, 0.112%, 0.132% and
0.083%.Referring to the criterion of TB/T 2922.5, determine that curing time is 8h.
Embodiment 6:
The present embodiment and the difference of embodiment 5 are: in step a), selecting concentration is potassium hydroxide-sodium hydroxide of 2mol/L
Solution is as conditioning solutions；In step c), control pressure steams concrete microtrabeculae test specimen and potassium hydroxide-sodium hydroxide solution in kettle
Volume is 1:2.Remaining condition is referring to embodiment 2.
Embodiment 7:
The present embodiment and the difference of embodiment 5 are: in step a), selecting concentration is potassium hydroxide-sodium hydroxide of 2mol/L
Solution is as conditioning solutions；In step c), control pressure steams concrete microtrabeculae test specimen and potassium hydroxide-sodium hydroxide solution in kettle
Volume is 1:4.Remaining condition is referring to embodiment 2.
Embodiment 8:
The present embodiment and the difference of embodiment 5 are: in step a), selecting concentration is potassium hydroxide-sodium hydroxide of 2mol/L
Solution is as conditioning solutions；In step c), control pressure steams concrete microtrabeculae test specimen and potassium hydroxide-sodium hydroxide solution in kettle
Volume is 1:6.Remaining condition is referring to embodiment 2.
Available the following contents of 6-8 based on the above embodiment:
Fig. 4 is XW-1 and XW-2 concrete microtrabeculae test specimen and conditioning solutions volume ratio Vs/VlIt is conserved respectively for 1:2,1:4 and 1:6
In 150oC, the expansion rate in 2mol/L potassium hydroxide-sodium hydroxide solution.Vs/VlWhen for 1:2,1:4 and 1:6, XW-1 coagulation
The expansion rate of native microtrabeculae test specimen 8h is respectively 0.064%, 0.120% and 0.122%, XW-2 concrete microtrabeculae test specimen 8h expansion rate point
It Wei 0.072%, 0.112% and 0.117%.Vs/VlConcrete microtrabeculae test specimen XW-1 and XW-2 is less than in 8h expansion rate when for 1:2
Vs/VlFor 1:4 and 1:6, and Vs/VlConcrete microtrabeculae test specimen XW-1 and XW-2 is in 8h expansion rate and V when for 1:4s/VlWhen for 1:6
It is close.HCl titration through 1.0867mol/L, Vs/VlConcentration declines respectively after impregnating XW-1 and XW-2 conditioning solutions 8h when for 1:2
12.2% and 16.2%, Vs/VlConditioning solutions concentration declines 6.2% and 8.9%, V respectively when for 1:4s/VlConditioning solutions are dense when for 1:6
Degree declines 5.4% and 8.8% respectively.Vs/VlThe amount of conditioning solutions is not very enough when for 1:2, and the concentration of aqueous slkali reduces more, is mixed
The expansion development of solidifying soil microtrabeculae test specimen is more relatively slow, but Vs/VlWhen for 1:4 and 1:6, the concentration of aqueous slkali is not remarkably decreased, is mixed
The expansion development of solidifying soil microtrabeculae test specimen is relatively fast, and it is anti-to guarantee to illustrate that the conditioning solutions of 1:4 and 1:6 can provide enough alkali
The progress answered.
Embodiment 9:
The present embodiment and the difference of embodiment 5 are: in step a), selecting concentration is potassium hydroxide-sodium hydroxide of 2mol/L
Solution is as conditioning solutions；In step c), controlled at 120 DEG C, 8h is conserved.Remaining condition is referring to embodiment 2.
Embodiment 10:
The present embodiment and the difference of embodiment 5 are: in step a), selecting concentration is potassium hydroxide-sodium hydroxide of 2mol/L
Solution is as conditioning solutions, remaining condition is referring to embodiment 2.
Embodiment 11:
The present embodiment and the difference of embodiment 5 are: in step a), selecting concentration is potassium hydroxide-sodium hydroxide of 2mol/L
Solution is as conditioning solutions；In step c), controlled at 216 DEG C, 8h is conserved.Remaining condition is referring to embodiment 2.
Available the following contents of 9-11 based on the above embodiment:
Fig. 5 is XW-1, XW-2, XW-3 and XW-4 concrete microtrabeculae respectively 120oC、150oC and 216oThe 2mol/L hydroxide of C
The expansion rate conserved in potassium-sodium hydroxide solution, concrete microtrabeculae and conditioning solutions volume ratio V when tests/VlFor 1:4.Maintenance
When age 8h, 120oThe expansion rate of XW-1, XW-2, XW-3 and XW-4 concrete microtrabeculae of C maintenance is respectively 0.056%,
0.069%, 0.067% and 0.046%；150oC maintenance XW-1, XW-2, XW-3 and XW-4 concrete microtrabeculae expansion rate be respectively
0.120%, 0.112%, 0.132% and 0.083%；216oXW-1, XW-2, XW-3 and XW-4 concrete microtrabeculae expansion rate of C maintenance
Respectively 0.136%, 0.118%, 0.140% and 0.88%.
The development that curing temperature peomotes the expansion of concrete microtrabeculae is improved, curing temperature is from 120oC is improved to 150oC
When, 150oXW-1, XW-2, XW-3 and XW-4 concrete microtrabeculae 8h expansion rate of C maintenance has been respectively increased 114%% than 120 DEG C,
62%, 97% and 80%.And temperature be increased to from 150 DEG C 216 DEG C of expansion rates improve it is unobvious.Therefore determine that curing temperature is 150 DEG C.
Embodiment 12:
The step in conjunction with described in above-described embodiment 1-11 and data parameters evaluate the sentencing with alkali_silica reaction activity expansion rate that gather materials
According to as follows:
To Guizhou Area of Southeast Guizhou contain hair, Kingsoft, it is auspicious in, prosperity, river valley, Shi Jiangchong, hair arch bridge and the stockaded village Wu Jia stock ground slate into
Row comparison statistical test determines that expansion rate decision content is 0.10%.
Sheng Fa, it is auspicious in, Kingsoft, prosperity, river valley, Shi Jiangchong, hair arch bridge and the stockaded village Wu Jia stock ground block stone, rubble and sand JTG
The inspection of E42 lithofacies method, 2922.5 accelerated motar-bar test of TB/T and concrete microtrabeculae accelerated test procedures (herein described method)
It surveys result and is summarized in table 2, table 3, Fig. 6 and Fig. 7.
Table 2 contain hair, it is auspicious in and the alkali_silica reaction activity test result gathered materials of Kingsoft stock ground
It can see that by above-mentioned table 2
Contain material issuance field block stone, rubble and sand 2922.5 accelerated motar-bar test of TB/T the result shows that, contain material issuance field block stone SF1,
SF2, SFA, SFB and rubble SFCR have alkali_silica reaction activity, and it is anti-that block stone SF3, rubble SFC and sand SFS do not have alkali silicic acid
Answer activity；Concrete microtrabeculae accelerated test procedures the result shows that, block stone SF1 and SFA have alkali_silica reaction activity, block stone
SF2, SF3, SFB, rubble SFC, SFCR and sand SFS are active without alkali_silica reaction, comprehensive judgement Sheng material issuance field block stone SF1,
SF2, SFA, SFB and rubble SFCR have alkali_silica reaction activity, and it is anti-that block stone SF3, rubble SFC and sand SFS do not have alkali silicic acid
Answer activity.The 2922.5 accelerated motar-bar test test specimen 14d expansion rate of TB/T for containing material issuance field block stone, rubble and sand is 0.078%-
0.235%, concrete microtrabeculae accelerated test procedures test specimen maximum swelling rate is 0.069%-0.127%.
2922.5 accelerated motar-bar test of TB/T of auspicious lining field block stone, rubble and sand the result shows that, auspicious lining field block stone
RL1, RL3, RLB, rubble RLC, RLCR and sand RLS have alkali_silica reaction activity, and it is anti-that block stone RL2 and RLA do not have alkali silicic acid
Answer activity；Concrete microtrabeculae accelerated test procedures the result shows that, auspicious lining field block stone RL1, RL2, RL3, RLB, rubble
RLC, RLCR and sand RLS block stone, rubble and sand have alkali_silica reaction activity, and block stone RLA does not have alkali_silica reaction activity；It is comprehensive
It closes and determines that auspicious lining field block stone RL1, RL2, RL3, RLB, rubble RLC, RLCR and sand RLS have alkali_silica reaction activity, block stone
RLA does not have alkali_silica reaction activity.The 2922.5 accelerated motar-bar test test specimen 14d of TB/T of auspicious lining field block stone, rubble and sand
Expansion rate is 0.086%-0.210%, is individually 0.331%, and concrete microtrabeculae express method test specimen maximum swelling rate is 0.095%-
0.158%。
2922.5 accelerated motar-bar test of TB/T of Kingsoft stock ground (township Jianhe Tai Yong Kingsoft stock ground) block stone the result shows that,
Block stone JS1, JS4 and JSB do not have alkali_silica reaction activity, and block stone JS3, JS5, JSA and JSC have alkali_silica reaction activity；
Concrete microtrabeculae accelerated test procedures the result shows that, block stone JS1, JS3, JS4, JS5, JSA, JSB and JSC have alkali silicic acid
Reactivity, comprehensive judgement Kingsoft stock ground block stone JS1, JS3, JS4, JS5, JSA, JSB and JSC have alkali_silica reaction activity.
The 2922.5 accelerated motar-bar test test specimen 14d expansion rate of TB/T of Kingsoft stock ground block stone is 0.081%-0.146%, concrete microtrabeculae
Express method test specimen maximum swelling rate is 0.119%-0.162%.
The alkali_silica reaction activity test result that 3 prosperity of table, river valley, Shi Jiangchong, hair arch bridge and the stockaded village Wu Jia stock ground gather materials
It can see that by above-mentioned table 3
2922.5 accelerated motar-bar test of TB/T of prosperous stock ground block stone and rubble the result shows that, prosperous stock ground block stone and rubble tool
There is alkali_silica reaction active；Concrete microtrabeculae accelerated test procedures the result shows that, prosperous stock ground block stone have alkali_silica reaction
Activity, rubble XWCR do not have alkali_silica reaction activity；Comprehensive judgement prosperity stock ground block stone and rubble are living with alkali_silica reaction
Property.The 2922.5 accelerated motar-bar test test specimen 14d expansion rate of TB/T of prosperous stock ground block stone and rubble is 0.165%-0.295%, is mixed
Solidifying soil microtrabeculae express method test specimen maximum swelling rate is 0.088%-0.151%.Because being free of dolomite, prosperous stock ground block stone and rubble
Without Alkali-carbonate reaction activity.
2922.5 accelerated motar-bar test of TB/T and concrete microtrabeculae express method of river valley stock ground block stone the result shows that, river
Paddy stock ground block stone has alkali_silica reaction activity.The 2922.5 accelerated motar-bar test test specimen 14d of TB/T of river valley stock ground block stone expands
Rate is 0.328% and 0.348%, and concrete microtrabeculae express method test specimen maximum swelling rate is 0.116% and 0.124%.
The knot of 2922.5 accelerated motar-bar test of TB/T and concrete microtrabeculae express method of stonemason's slug field block stone and rubble
Fruit shows that stonemason's slug field block stone and rubble have alkali_silica reaction activity.The TB/T of stonemason's slug field block stone and rubble
2922.5 accelerated motar-bar test test specimen 14d expansion rates are 0.108%-0.230%, and concrete microtrabeculae express method test specimen maximum is swollen
Swollen rate is 0.101%-0.135%.
Hair arch bridge stock ground block stone, rubble and sand contain 8%-11% crystallite quartz, are free of dolomite.2922.5 mortar of TB/T
Stick express method the result shows that, hair arch bridge stock ground block stone, rubble and sand have alkali_silica reaction activity；Concrete microtrabeculae is quick
Test method the result shows that, hair arch bridge stock ground block stone MGQ1, MGQ2, MGQ4 and rubble MGQCR have alkali_silica reaction activity, block
Stone MGQ3 and sand MGQS does not have alkali_silica reaction activity；Comprehensive judgement hair arch bridge stock ground block stone, rubble and sand have alkali silicic acid
Reactivity.The 2922.5 accelerated motar-bar test test specimen 14d expansion rate of TB/T of hair arch bridge stock ground block stone, rubble and sand is
0.262%-0.340% is individually 0.160%, and concrete microtrabeculae express method test specimen maximum swelling rate is 0.084%-0.131%.
The knot of 2922.5 accelerated motar-bar test of TB/T and concrete microtrabeculae express method of the stockaded village Wu Jia stock ground block stone and rubble
Fruit shows that the stockaded village Wu Jia stock ground block stone and rubble have alkali_silica reaction activity.The TB/T of the stockaded village Wu Jia stock ground block stone and rubble
2922.5 accelerated motar-bar test test specimen 14d expansion rates are 0.331%-0.366%, and concrete microtrabeculae express method test specimen maximum is swollen
Swollen rate is 0.115%-0.158%.
Synthesis it is described above, concrete microtrabeculae test specimen when in use, the volume ratio V with conditioning solutionss/VlIt is ratio for 1:4
Appropriate.Choose 150oThe curing temperature of C can shorten test period.Curing temperature 150oWhen C, the concentration of conditioning solutions is selected
Take 2mol/L aqueous slkali as conditioning solutions, choose curing age be 8h concrete column expansion rate be 0.10% can be with.This condition and
Criterion can be used as the method whether slate there is alkali_silica reaction activity assessment to study.
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, it is all according to
According to technical spirit any simple modification to the above embodiments of the invention, equivalent variations, protection of the invention is each fallen within
Within the scope of.
Claims (10)
1. one kind is for judging the active concrete microtrabeculae test specimen of alkali_silica reaction that gathers materials containing slate, it is characterised in that: described mixed
Solidifying soil microtrabeculae test specimen is that it is micro- to form obtained concrete with aqueous slkali by aggregate crusher containing slate to be detected and after cement is added
Column, then obtained through conserving, the size of the concrete microtrabeculae is 40mm × 40mm × 160mm.
2. according to claim 1 a kind of for judging the active concrete microtrabeculae examination of alkali_silica reaction of gathering materials containing slate
Part, it is characterised in that: the concentration of the aqueous slkali is 1-2mol/L.
3. according to claim 1 a kind of for judging the active concrete microtrabeculae examination of alkali_silica reaction of gathering materials containing slate
Part, it is characterised in that: the maintenance is to conserve concrete microtrabeculae for 24 hours at 18-22 DEG C.
4. a kind of for judging the active concrete microtrabeculae test specimen of alkali_silica reaction that gathers materials containing slate according to claim 1
Preparation method, it is characterised in that: the following steps are included:
(1) rubble and Machine-made Sand is made in aggregate crusher containing slate to be detected；
(2) cement is added after mixing rubble and Machine-made Sand, then is formed with aqueous slkali and concrete microtrabeculae is made；
(3) concrete microtrabeculae is conserved and concrete microtrabeculae test specimen is made.
5. a kind of for judging the active concrete microtrabeculae test specimen of alkali_silica reaction that gathers materials containing slate according to claim 4
Preparation method, it is characterised in that: in the step (1), the partial size of rubble is 5-10mm, and the partial size of Machine-made Sand is 0.08-5mm.
6. a kind of for judging the active concrete microtrabeculae test specimen of alkali_silica reaction that gathers materials containing slate according to claim 4
Preparation method, it is characterised in that: in the step (2), by rubble: Machine-made Sand=6:4 volume ratio, by rubble, Machine-made Sand and water
Mud is uniformly mixed.
7. a kind of for judging the active concrete microtrabeculae test specimen of alkali_silica reaction that gathers materials containing slate according to claim 1
Application method, it is characterised in that: the concrete microtrabeculae test specimen is placed in potassium hydroxide-sodium hydroxide solution, in 0.2-
2.15Mpa pressure after conserving 6-12h at a temperature of 120-216 DEG C, detects the expansion rate of the concrete microtrabeculae test specimen, if expansion rate
>=0.1%, then judge this contain slate gather materials have alkali_silica reaction activity；If expansion rate < 0.1%, judge that this contains slate and gathers materials
Do not have alkali_silica reaction activity.
8. a kind of for judging the active concrete microtrabeculae test specimen of alkali_silica reaction that gathers materials containing slate according to claim 7
Application method, it is characterised in that: the concrete microtrabeculae test specimen is boiled in water after boiling 6h, it is molten with potassium hydroxide-sodium hydroxide
Liquid is conserved.
9. a kind of for judging the active concrete microtrabeculae test specimen of alkali_silica reaction that gathers materials containing slate according to claim 7
Application method, it is characterised in that: the concrete microtrabeculae test piece maintenance is in potassium hydroxide-sodium hydroxide that concentration is 1-2mol/L
In solution, the concrete microtrabeculae test specimen and potassium hydroxide-sodium hydroxide solution fixing fabric structure are in 1:(4-8).
10. a kind of for judging the active concrete microtrabeculae test specimen of alkali_silica reaction that gathers materials containing slate according to claim 7
Application method, it is characterised in that: detect the expansion rate of the concrete microtrabeculae test specimen the following steps are included:
(1) the prepackage test ailhead on concrete microtrabeculae；
(2) length of the concrete microtrabeculae after measurement maintenance, is denoted as initial length L0；
(3) length of the concrete microtrabeculae test specimen after measurement maintenance, is denoted as length Lt；
(4) the expansion rate P of concrete microtrabeculae test specimen is calculatedt:。
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| CN110376328A (en) * | 2019-07-16 | 2019-10-25 | 吴云 | It is a kind of to judge the active method of alkali_silica reaction of gathering materials containing slate |
| CN112858646A (en) * | 2021-01-20 | 2021-05-28 | 同济大学 | Method for rapidly judging alkali silicate reaction activity of rock aggregate |
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| CN112858646A (en) * | 2021-01-20 | 2021-05-28 | 同济大学 | Method for rapidly judging alkali silicate reaction activity of rock aggregate |
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