CN106814020B - Method for determination of multi-scale porosity in concrete - Google Patents
Method for determination of multi-scale porosity in concrete Download PDFInfo
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- CN106814020B CN106814020B CN201710133279.4A CN201710133279A CN106814020B CN 106814020 B CN106814020 B CN 106814020B CN 201710133279 A CN201710133279 A CN 201710133279A CN 106814020 B CN106814020 B CN 106814020B
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Abstract
The invention discloses a kind of measuring method of the multiple dimensioned hole of concrete, 60 μm of hole diameter >, 25 μm ~ 60 μm, 5 μm ~ 25 μm of porosity and pore-size distribution are successively obtained using X-ray computed tomography scanning method；The porosity and pore-size distribution of hole of the diameter between 100nm ~ 5 μm are obtained using mercury injection method；The porosity and pore-size distribution of hole of the diameter between 0.4nm ~ 100nm are obtained using gas adsorption method.The present invention is by being designed combination for mercury injection method, gas adsorption method and X-ray computed tomography scanning method, and the obtained bore hole size of different test methods is subjected to reasonable link and matching, to obtain the multi-scale range characterization information of accurately and reliably concrete hole while evading error generation.In addition, using three-dimensional test analysis method when X-ray computed tomography scanning information processing, the statistics and confidence level of data are improved.Sample error is reduced to minimum for being tested for concrete test block one by entire test process.
Description
Technical field
The present invention relates to building material technical field, the measuring method of especially a kind of multiple dimensioned hole of concrete.
Background technique
Concrete material is a kind of multiphase, inhomogeneous composite materials, and it is (microcosmic-thin that multiple dimensioned characteristic is showed in structure
Sight-macroscopic view), the complexity of microstructure largely results in the uncertainty of macro property.Concrete material mesoporous
The differentiation of structure is superimposed closely related with reciprocation with the damage of hardened paste deterioration, damage.
In concrete structure, the distribution of hole diameter is from 1nm to 10mm, across 7 orders of magnitude, different scale model
The hole enclosed is different to the mode of action and effect tendency of its microcosmic mechanism and macroscopical durability, it is therefore desirable to in concrete
Hole carry out Multi-scale characterization and research.
Currently, being mostly both at home and abroad following several method to the test method of concrete hole structure.
1. mercury injection method
Mercury injection method is current most widely used test method, specific test method such as standard GB/T/T 21650.3-
Described in 2011, surveyed pore diameter range is at 5nm-200 μm, but this kind of method, and test error is big, and confidence level pore diameter range is small.
2. gas adsorption method
Gas adsorption method is also common test method, and specific test method is also in standard GB/T/T 21650.3-
It being elaborated in 2011, but the surveyed pore diameter range of this kind of test method is nm rank, sample size is only tens milligrams, and one
Aspect does not have enough representativenesses, in addition can not be used for the Multi-scale characterization of concrete hole.
3.X ray tomography scanning method
This method is to carry out pore structure study, such as patent to concrete by X-ray computed tomography scanning
Described in CN201310408977.2, but analysis method employed in the patent, only the intercommunicating pore in pervious concrete is carried out
The statistics of Two-dimensional Statistical analysis, taken two dimension slicing limited amount, data is not high.
Therefore, up to the present, single test method is all made of to the analysis of concrete hole structure.Single test method
Do not know place be: sample size needed for one side is limited, cannot represent the truth of test block itself, another aspect institute gaging hole
Diameter range is also limited, cannot obtain the hole information of concrete multi-scale range.
In addition, being obtained even if those skilled in the art carry out simple combination using any of the above-described kind of method or by above-mentioned three kinds of methods
Multiple dimensioned hole information is arrived, also due to not understanding fully the principle and avoid mode that error generates in crucial means of testing, not specially
Door design calculation process, thus reasonable link and matching cannot be carried out to the obtained bore hole size of different test methods.In addition,
Reasonable link and matching itself are carried out to the obtained bore hole size of different test methods, also will be that an exception is cumbersome and huge
Work.
Summary of the invention
In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a kind of concrete is multiple dimensioned
The measuring method of hole, the measuring method of the multiple dimensioned hole of the concrete is by chromatographing mercury injection method, gas adsorption method and X-ray
Scanning method is designed combination, and the obtained bore hole size of different test methods is carried out reasonable link and matching, thus
While evading error generation, the multi-scale range characterization information of accurately and reliably concrete hole is obtained.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of measuring method of the multiple dimensioned hole of concrete, includes the following steps:
Step 1, obtain porosity and pore-size distribution that diameter is greater than 60 μm of holes: diameter is greater than the porosity of 60 μm of holes
And the specific acquisition methods of pore-size distribution are as follows.
Step 11, take concrete test block one: the size of concrete test block one, need to be according to X-ray scanners when choosing
Model makes under the size, and the resolution ratio of X-ray scanners can reach 60 μm.
Step 12, X-ray computed tomography scanning: X is carried out to the concrete test block one that step 11 is chosen using X-ray scanners and is penetrated
Line computed tomography scanning.
Step 13, X-ray computed tomography scanning information processing: according to concrete grout in the X-ray computed tomography scanning information of step 12
The difference of gray value between body, stone and hole, by Vgstudiomax analyze software, to surveyed region three-dimensional space into
Row calculates.
Step 14, it extracts diameter to be greater than the hole information of 60 μm of holes and calculate hole total volume: according in step 13 three
Calculated result in dimension space extracts the hole information of blind hole of the diameter greater than 60 μm, volume, aperture including each hole
And spatial distribution, calculate hole total volume.
Step 15, calculated diameter is greater than the porosity of 60 μm of holes: according to the calculated result in step 13 in three-dimensional space,
Stone is extracted, and calculates volume shared by stone, to calculate slurry total volume；By the calculated hole total volume of step 14
Compared with mortar total volume, the porosity that diameter is greater than 60 μm of concrete holes is obtained.
Step 2, obtain the porosity and pore-size distribution of hole of the diameter between 25 μm ~ 60 μm: specific acquisition methods are such as
Under.
Step 21, it takes concrete test block two: in the concrete test block one that step 11 is chosen, choosing at least three different samplings
Position respectively takes a block concrete test block two in each sampling point；The size of concrete test block two need to be penetrated when choosing according to X
The model of line scanner makes under the size, and the resolution ratio of X-ray scanners can reach 25 μm.
Step 22, X-ray computed tomography scanning: every block concrete test block two that step 21 is chosen is divided using X-ray scanners
It carry out not X-ray computed tomography scanning.
Step 23, X-ray computed tomography scanning information processing: to step 22 scan every block concrete test block two all in accordance with step
13 scan process mode calculates the surveyed region of every block concrete test block two in three-dimensional space.
Step 24, the porosity mean value of diameter hole between 25 μm ~ 60 μm is extracted: according in step 23 in three-dimensional space
Calculated result, every block concrete test block two divided equally to you can well imagine take the hole information of blind hole of the diameter between 25 μm ~ 60 μm,
Volume, aperture and spatial distribution including each hole, and calculate hole total volume；Then, according to step 15 method to every
Block concrete test block two calculates separately out the slurry total volume and porosity of diameter hole between 25 μm ~ 60 μm；Then, by institute
The pore-size distribution and porosity data for having concrete test block two to extract are averaged, which is final required diameter 25
μm ~ 60 μm between hole pore-size distribution mean value and porosity mean value.
Step 25, the porosity that diameter is greater than 60 μm of holes compares verifying: using the identical method of step 24, extracting diameter
Greater than the porosity mean value of 60 μm of holes, the porosity mean value is then compared verifying with the porosity that step 15 obtains.
Step 3, obtain the porosity and pore-size distribution of hole of the diameter between 5 μm ~ 25 μm: specific acquisition methods are such as
Under.
Step 31, it takes concrete test block three: in each sampling point that step 21 is chosen, then respectively taking a block concrete test block
Three；The size of concrete test block three need to make under the size, X-ray scanners when choosing according to the model of X-ray scanners
Resolution ratio can reach 5 μm.
Step 32, X-ray computed tomography scanning: every block concrete test block three that step 31 is chosen is divided using X-ray scanners
It carry out not X-ray computed tomography scanning.
Step 33, X-ray computed tomography scanning information processing: to step 32 scan every block concrete test block three all in accordance with step
13 scan process mode calculates the surveyed region of every block concrete test block three in three-dimensional space.
Step 34, the porosity mean value of diameter hole between 5 μm ~ 25 μm is extracted: according in step 33 in three-dimensional space
Calculated result, every block concrete test block three divided equally to you can well imagine take the hole information of blind hole of the diameter between 5 μm ~ 25 μm,
Volume, aperture and spatial distribution including each hole, and calculate hole total volume；Then, according to step 15 method to every
Block concrete test block three calculates separately out the slurry total volume and porosity of diameter hole between 5 μm ~ 25 μm；Then, by institute
The pore-size distribution and porosity data for having concrete test block three to extract are averaged, which is final required diameter in 5 μ
The pore-size distribution mean value and porosity mean value of hole between m ~ 25 μm.
Step 35, diameter porosity of hole between 25 μm ~ 60 μm compares verifying: the identical method of step 34 is used,
Extract the porosity mean value of diameter hole between 25 μm ~ 60 μm, the porosity mean value for then obtaining this step and step 24
Obtained porosity mean value is compared verifying.
Step 4, the porosity and pore-size distribution of hole of the diameter between 100nm ~ 5 μm are obtained: step 21 is chosen
All concrete test blocks two, according to GB/T 21650.3-2011, sampling, drying carry out Mercury injection test；Every block concrete is tried
Block two, after calculating Mercury injection test, the porosity and pore-size distribution of diameter hole between 100nm ~ 5 μm；Then, to all mixed
Porosity mean value and pore-size distribution mean value after solidifying soil two pressure mercury of test block experiment, obtain mortar inside diameter in 100nm ~ 5 μm
Between hole porosity and pore-size distribution.
Step 5, the porosity and pore-size distribution of hole of the diameter between 0.4nm ~ 100nm are obtained: step 31 is chosen
All concrete test blocks three, according to GB/T 21650.3-2011, sampling, drying carry out gas absorption test；It is mixed to every piece
Solidifying soil test block three, after the test of calculating gas absorption, the porosity and pore-size distribution of diameter hole between 0.4nm ~ 100nm；
Then, porosity mean value and pore-size distribution mean value after taking gas absorption to test all concrete test blocks three, obtain in mortar
The porosity and pore-size distribution of portion's diameter hole between 0.4nm ~ 100nm.
Step 6, the porosity of step 1 to step 5 gained mortar is added, obtains mortar inside diameter in 0.4nm or more
The porosity and pore-size distribution of hole；Including gravel apparent volume is rethought, by calculating, the porosity of entire test block can be obtained
And pore-size distribution.
The concrete test block is highly 20 centimetres of packet first is that section side length is 5 centimetres.
In the step 21, the sampling point in concrete test block one is three, is separately positioned on concrete test block one
The position of upper, middle and lower three.
Each concrete test block two is the cube that side length is 2 centimetres.
Each concrete test block three is that section side length is 0.5 centimetre, is highly 0.8 centimetre of packet.
In step 13, when by Vgstudiomax analysis software, gray threshold setting need to be carried out；Gray threshold
When setting, selected perforated outer rim will combine closely with slurry, cannot there is the hole of omission, can not select slurry into this
Area.
In step 25 and step 35, when carrying out porosity verifying, when error is within ± 2%, then it is assumed that test result is closed
Reason；When error is greater than 2%, calculating verifying is carried out again after gray threshold need to be reset.
The present invention after adopting the above method, has the following beneficial effects:
1. the selection of concrete test block one, concrete test block two and concrete test block three, close to concrete structure institute coring
Sample ruler cun, it is representative.
2.X ray tomography scanning information processing when use three-dimensional test analysis method, improve data statistics and can
Reliability.
3. sample error is reduced to minimum for being tested for concrete test block one by entire test process.
4. the result that different test methods are obtained carries out Data Matching and soundness verification, concrete test block is finally obtained
Interior nanometer-centimeter scale range porosity and pore-size distribution, test object are 5 μm of diameter or more of closed pore and 0.4nm-5 μm
Aperture；
Precision is high, can quantitative test go out the porosity and pore-size distribution of inside concrete.
Detailed description of the invention
Fig. 1 shows the X-ray computed tomography scanning X-Y scheme before and after X-ray computed tomography scanning information processing of the present invention.Wherein, scheme
1-1 is the X-ray computed tomography scanning X-Y scheme before the information processing of X-ray computed tomography scanning, and Fig. 1-2 is at X-ray computed tomography scanning information
X-ray computed tomography scanning X-Y scheme after reason.
Fig. 2 shows the schematic diagram of concrete test block one and three sampling points.
Specific embodiment
Xia Mianjiehefutuhejuti compare Jia Shishifangshiduibenfamingzuojinyibuxiangxishuoming.
A kind of measuring method of the multiple dimensioned hole of concrete, includes the following steps.
Step 1, porosity and pore-size distribution that diameter is greater than 60 μm of holes are obtained, specific acquisition methods are as follows.
Step 11, take concrete test block one: the size of concrete test block one, need to be according to X-ray scanners when choosing
Model makes under the size, and the resolution ratio of X-ray scanners can reach 60 μm.
In the present invention, the section of concrete test block one is preferably square, and concrete test block one is preferably that section side length is 5
Centimetre, it is highly 20 centimetres of packet.
Step 12, X-ray computed tomography scanning: X is carried out to the concrete test block one that step 11 is chosen using X-ray scanners and is penetrated
Line computed tomography scanning.
Step 13, X-ray computed tomography scanning information processing: according to concrete grout in the X-ray computed tomography scanning information of step 12
The difference of gray value between body, stone and hole, by Vgstudiomax analyze software, to surveyed region three-dimensional space into
Row calculates.
When being analyzed using Vgstudiomax analysis software, gray threshold setting need to be carried out；Gray threshold setting
When, selected perforated outer rim will combine closely with slurry, cannot there is the hole of omission, can not be by the area slurry Xuan Jingai.
X-ray computed tomography scanning X-Y scheme before and after X-ray computed tomography scanning information processing is as shown in Figure 1.Wherein, Fig. 1-1 is X
X-ray computed tomography scanning X-Y scheme before the processing of ray tomography scanning information, Fig. 1-2 are the X after the information processing of X-ray computed tomography scanning
Ray tomography scans X-Y scheme.
Step 14, it extracts diameter to be greater than the hole information of 60 μm of holes and calculate hole total volume: according in step 13 three
Calculated result in dimension space extracts the hole information of blind hole of the diameter greater than 60 μm, volume, aperture including each hole
And spatial distribution, calculate hole total volume.
Step 15, calculated diameter is greater than the porosity of 60 μm of holes: according to the calculated result in step 13 in three-dimensional space,
Stone is extracted, and calculates volume shared by stone, to calculate slurry total volume；By the calculated hole total volume of step 14
Compared with mortar total volume, the porosity that diameter is greater than 60 μm of concrete holes is obtained.
Step 2, obtain the porosity and pore-size distribution of hole of the diameter between 25 μm ~ 60 μm: specific acquisition methods are such as
Under.
Step 21, it takes concrete test block two: in the concrete test block one that step 11 is chosen, it is different to choose at least three
Sampling point.In the present invention, sampling point is preferably three, three sampling parts be separately positioned on concrete test block one it is upper,
In, lower three positions.Three sampling points label 1,2 and 3 as shown in Figure 2.
A block concrete test block two is respectively taken in each sampling point；The size of concrete test block two, need to be according to X when choosing
The model of ray scanner makes under the size, and the resolution ratio of X-ray scanners can reach 25 μm.
In the present invention, each concrete test block two is both preferably the cube that side length is 2 centimetres.
Step 22, X-ray computed tomography scanning: every block concrete test block two that step 21 is chosen is divided using X-ray scanners
It carry out not X-ray computed tomography scanning.
Step 23, X-ray computed tomography scanning information processing: to step 22 scan every block concrete test block two all in accordance with step
13 scan process mode calculates the surveyed region of every block concrete test block two in three-dimensional space.
Step 24, the porosity mean value of diameter hole between 25 μm ~ 60 μm is extracted: according in step 23 in three-dimensional space
Calculated result, every block concrete test block two divided equally to you can well imagine take the hole information of blind hole of the diameter between 25 μm ~ 60 μm,
Volume, aperture and spatial distribution including each hole, and calculate hole total volume.
Then, diameter hole between 25 μm ~ 60 μm is calculated separately out to every block concrete test block two according to step 15 method
The slurry total volume in hole, calculated hole total volume obtains porosity compared with mortar total volume in this step；
Then, pore-size distribution and porosity data that all concrete test blocks two extract are averaged, which is
The pore-size distribution mean value and porosity mean value of final required diameter hole between 25 μm ~ 60 μm.
Step 25, the porosity that diameter is greater than 60 μm of holes compares verifying: using the identical method of step 24, extracting diameter
Greater than the porosity mean value of 60 μm of holes, the porosity mean value is then compared verifying with the porosity that step 15 obtains.
When carrying out porosity verifying, when error is within ± 2%, then it is assumed that test result is reasonable；When error is greater than 2%
When, calculating verifying is carried out again after gray threshold need to be reset.
Step 3, obtain the porosity and pore-size distribution of hole of the diameter between 5 μm ~ 25 μm: specific acquisition methods are such as
Under.
Step 31, it takes concrete test block three: in each sampling point that step 21 is chosen, then respectively taking a block concrete test block
Three；The size of concrete test block three need to make under the size, X-ray scanners when choosing according to the model of X-ray scanners
Resolution ratio can reach 5 μm.
In the present invention, the section of each concrete test block three is both preferably square, and each concrete test block three is preferably
It is 0.5 centimetre for section side length, is highly 0.8 centimetre of packet.
Step 32, X-ray computed tomography scanning: every block concrete test block three that step 31 is chosen is divided using X-ray scanners
It carry out not X-ray computed tomography scanning.
Step 33, X-ray computed tomography scanning information processing: to step 32 scan every block concrete test block three all in accordance with step
13 scan process mode calculates the surveyed region of every block concrete test block three in three-dimensional space.
Step 34, the porosity mean value of diameter hole between 5 μm ~ 25 μm is extracted: according in step 33 in three-dimensional space
Calculated result, every block concrete test block three divided equally to you can well imagine take the hole information of blind hole of the diameter between 5 μm ~ 25 μm,
Volume, aperture and spatial distribution including each hole, and calculate hole total volume；Then, according to step 15 method to every
Block concrete test block three calculates separately out the slurry total volume of diameter hole between 5 μm ~ 25 μm, calculated hole in this step
Hole total volume obtains porosity compared with mortar total volume；Then, the pore-size distribution all concrete test blocks three extracted and hole
Gap rate data are averaged, which is final required diameter the pore-size distribution mean value of hole and hole between 5 μm ~ 25 μm
Gap rate mean value.
Step 35, diameter porosity of hole between 25 μm ~ 60 μm compares verifying: the identical method of step 34 is used,
Extract the porosity mean value of diameter hole between 25 μm ~ 60 μm, the porosity mean value for then obtaining this step and step 24
Obtained porosity mean value is compared verifying.
When carrying out porosity verifying, when error is within ± 2%, then it is assumed that test result is reasonable；When error is greater than 2%
When, calculating verifying is carried out again after gray threshold need to be reset.
Step 4, the porosity and pore-size distribution of hole of the diameter between 100nm ~ 5 μm are obtained: step 21 is chosen
All concrete test blocks two, according to GB/T 21650.3-2011, sampling, drying carry out Mercury injection test；Every block concrete is tried
Block two, after calculating Mercury injection test, the porosity and pore-size distribution of diameter hole between 100nm ~ 5 μm；Then, to all mixed
Porosity mean value and pore-size distribution mean value after solidifying soil two pressure mercury of test block experiment, obtain mortar inside diameter in 100nm ~ 5 μm
Between hole porosity and pore-size distribution.
It is 3.6nm-360000nm that mercury injection method used in the present invention, which can survey pore diameter range, and the higher data model of practical confidence level
It is trapped among 10nm-10000nm, in order to improve confidence level, and is connected with step 3 acquired results, the taken range of results of the present invention is
100nm(> 100nm) -5 μm (≤5 μm).The average value for taking the surveyed mercury pressuring data of three concrete test blocks two, thus obtains mortar
The porosity and pore-size distribution of the internal size range.
Step 5, the porosity and pore-size distribution of hole of the diameter between 0.4nm ~ 100nm are obtained: step 31 is chosen
All concrete test blocks three, according to GB/T 21650.3-2011, sampling, drying carry out gas absorption test；It is mixed to every piece
Solidifying soil test block three, after the test of calculating gas absorption, the porosity and pore-size distribution of diameter hole between 0.4nm ~ 100nm；
Then, porosity mean value and pore-size distribution mean value after taking gas absorption to test all concrete test blocks three, obtain in mortar
The porosity and pore-size distribution of portion's diameter hole between 0.4nm ~ 100nm.
It is 0.35nm-500nm that the gases used absorption method of the present invention, which can survey pore diameter range, and more effective analyst coverage is 2-
200nm, the present invention take 0.4nm (>=0.4nm) -100nm (≤100nm).What hole information and step 4 greater than 100nm were surveyed
Data are compared verifying, if the porosity distribution trend of 100nm-500nm range is close with pressure mercury acquired results, then it is assumed that number
According to reliable.Thus the average value for taking three gas adsorption method the data obtained of concrete test block obtains the size range inside mortar
Porosity and pore-size distribution.
Step 6, the porosity of step 1 to step 5 gained mortar is added, obtains mortar inside diameter in 0.4nm or more
The porosity and pore-size distribution of hole；Including gravel apparent volume is rethought, by calculating, the porosity of entire test block can be obtained
And pore-size distribution.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail a variety of equivalents can be carried out to technical solution of the present invention within the scope of the technical concept of the present invention, this
A little equivalents all belong to the scope of protection of the present invention.
Claims (7)
1. a kind of measuring method of the multiple dimensioned hole of concrete, characterized by the following steps:
Step 1, obtain porosity and pore-size distribution that diameter is greater than 60 μm of holes: diameter is greater than the porosity and hole of 60 μm of holes
The specific acquisition methods of diameter distribution are as follows:
Step 11, take concrete test block one: the size of concrete test block one when choosing, need to according to the model of X-ray scanners,
Make under the size, the resolution ratio of X-ray scanners can reach 60 μm；
Step 12, X-ray layer X-ray computed tomography scanning: is carried out to the concrete test block one that step 11 is chosen using X-ray scanners
Analysis scanning；
Step 13, X-ray computed tomography scanning information processing: according to concrete mortar, stone in the X-ray computed tomography scanning information of step 12
The difference of gray value between son and hole is analyzed software by Vgstudiomax, is counted to surveyed region in three-dimensional space
It calculates；
Step 14, it extracts diameter to be greater than the hole information of 60 μm of holes and calculate hole total volume: according to three-dimensional space in step 13
Interior calculated result extracts the hole information of blind hole of the diameter greater than 60 μm, volume, aperture and sky including each hole
Between be distributed, calculate hole total volume；
Step 15, calculated diameter is greater than the porosity of 60 μm of holes: according to the calculated result in step 13 in three-dimensional space, extracting
Stone, and volume shared by stone is calculated, to calculate slurry total volume；By the calculated hole total volume of step 14 and sand
Slurry total volume is compared, and the porosity that diameter is greater than 60 μm of concrete holes is obtained；
Step 2, obtain the porosity and pore-size distribution of hole of the diameter between 25 μm ~ 60 μm: specific acquisition methods are as follows:
Step 21, it takes concrete test block two: in the concrete test block one that step 11 is chosen, choosing at least three different samplings
Position respectively takes a block concrete test block two in each sampling point；The size of concrete test block two need to be penetrated when choosing according to X
The model of line scanner makes under the size, and the resolution ratio of X-ray scanners can reach 25 μm；
Step 22, X-ray computed tomography scanning: every block concrete test block two that step 21 is chosen using X-ray scanners respectively into
Row X-ray computed tomography scanning；
Step 23, X-ray computed tomography scanning information processing: to step 22 scan every block concrete test block two all in accordance with step 13
Scan process mode calculates the surveyed region of every block concrete test block two in three-dimensional space；
Step 24, the porosity mean value of diameter hole between 25 μm ~ 60 μm is extracted: according to the meter in step 23 in three-dimensional space
Calculating as a result, dividing equally to every block concrete test block two you can well imagine the hole information for taking blind hole of the diameter between 25 μm ~ 60 μm, including
Volume, aperture and the spatial distribution of each hole, and calculate hole total volume；Then, mixed to every piece according to step 15 method
Solidifying soil test block two calculates separately out the slurry total volume and porosity of diameter hole between 25 μm ~ 60 μm；It then, will be all mixed
The pore-size distribution and porosity data that solidifying soil test block two is extracted are averaged, the average value be final required diameter 25 μm ~
The pore-size distribution mean value and porosity mean value of hole between 60 μm；
Step 25, the porosity that diameter is greater than 60 μm of holes compares verifying: using the identical method of step 24, extracting diameter and is greater than
Then the porosity mean value is compared verifying with the porosity that step 15 obtains by the porosity mean value of 60 μm of holes；
Step 3, obtain the porosity and pore-size distribution of hole of the diameter between 5 μm ~ 25 μm: specific acquisition methods are as follows:
Step 31, it takes concrete test block three: in each sampling point that step 21 is chosen, then respectively taking a block concrete test block three；
The size of concrete test block three need to make under the size when choosing according to the model of X-ray scanners, point of X-ray scanners
Resolution can reach 5 μm；
Step 32, X-ray computed tomography scanning: every block concrete test block three that step 31 is chosen using X-ray scanners respectively into
Row X-ray computed tomography scanning；
Step 33, X-ray computed tomography scanning information processing: to step 32 scan every block concrete test block three all in accordance with step 13
Scan process mode calculates the surveyed region of every block concrete test block three in three-dimensional space；
Step 34, the porosity mean value of diameter hole between 5 μm ~ 25 μm is extracted: according to the meter in step 33 in three-dimensional space
Calculating as a result, dividing equally to every block concrete test block three you can well imagine the hole information for taking blind hole of the diameter between 5 μm ~ 25 μm, including
Volume, aperture and the spatial distribution of each hole, and calculate hole total volume；Then, mixed to every piece according to step 15 method
Solidifying soil test block three calculates separately out the slurry total volume and porosity of diameter hole between 5 μm ~ 25 μm；It then, will be all mixed
The pore-size distribution and porosity data that solidifying soil test block three is extracted are averaged, which is final required diameter 5 μm ~ 25
The pore-size distribution mean value and porosity mean value of hole between μm；
Step 35, diameter porosity of hole between 25 μm ~ 60 μm compares verifying: using the identical method of step 34, extracts
The porosity mean value of diameter hole between 25 μm ~ 60 μm, then obtains the porosity mean value that this step obtains with step 24
Porosity mean value be compared verifying；
Step 4, the porosity and pore-size distribution of hole of the diameter between 100nm ~ 5 μm are obtained: step 21 being chosen all
Concrete test block two, according to GB/T 21650.3-2011, sampling, drying carry out Mercury injection test；To every block concrete test block two,
After calculating Mercury injection test, the porosity and pore-size distribution of diameter hole between 100nm ~ 5 μm；Then, to all concrete
Porosity mean value and pore-size distribution mean value after the experiment of two pressure mercury of test block, obtain mortar inside diameter between 100nm ~ 5 μm
The porosity and pore-size distribution of hole；
Step 5, the porosity and pore-size distribution of hole of the diameter between 0.4nm ~ 100nm: the institute that step 31 is chosen are obtained
There is concrete test block three, according to GB/T 21650.3-2011, sampling, drying carry out gas absorption test；To every block concrete
Test block three, after the test of calculating gas absorption, the porosity and pore-size distribution of diameter hole between 0.4nm ~ 100nm；Then,
Porosity mean value and pore-size distribution mean value after taking gas absorption to test all concrete test blocks three, obtain mortar inside diameter
The porosity and pore-size distribution of hole between 0.4nm ~ 100nm；
Step 6, the porosity of step 1 to step 5 gained mortar is added, obtains mortar inside diameter in 0.4nm or more hole
Porosity and pore-size distribution；Including gravel apparent volume is rethought, by calculating, porosity and the hole of entire test block can be obtained
Diameter distribution.
2. the measuring method of the multiple dimensioned hole of concrete according to claim 1, it is characterised in that: the concrete test block
First is that section side length is 5 centimetres, it is highly 20 centimetres of packet.
3. the measuring method of the multiple dimensioned hole of concrete according to claim 1, it is characterised in that: in the step 21,
Sampling point in concrete test block one is three, is separately positioned on the position of upper, middle and lower three of concrete test block one.
4. the measuring method of the multiple dimensioned hole of concrete according to claim 1, it is characterised in that: each concrete test block
Two be the cube that side length is 2 centimetres.
5. the measuring method of the multiple dimensioned hole of concrete according to claim 1, it is characterised in that: each concrete test block
Three be section side length be 0.5 centimetre, is highly 0.8 centimetre of packet.
6. the measuring method of the multiple dimensioned hole of concrete according to claim 1, it is characterised in that: in step 13, borrow
When helping Vgstudiomax analysis software, gray threshold setting need to be carried out；When gray threshold is arranged, outside selected perforated
Edge will combine closely with slurry, cannot there is the hole of omission, can not be by the area slurry Xuan Jingai.
7. the measuring method of the multiple dimensioned hole of concrete according to claim 1, it is characterised in that: step 25 and step 35
In, when carrying out porosity verifying, when error is within ± 2%, then it is assumed that test result is reasonable；When error is greater than 2%, weight is needed
Calculating verifying is carried out again after new setting gray threshold.
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