CN108956302A - A method of measurement compressive strength of aerated autoclaved concrete blocks - Google Patents
A method of measurement compressive strength of aerated autoclaved concrete blocks Download PDFInfo
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- CN108956302A CN108956302A CN201811056672.9A CN201811056672A CN108956302A CN 108956302 A CN108956302 A CN 108956302A CN 201811056672 A CN201811056672 A CN 201811056672A CN 108956302 A CN108956302 A CN 108956302A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
A method of measurement compressive strength of aerated autoclaved concrete blocks, comprising steps of step 1, chooses autoclave aerated concrete building block A several groups, range of a portion moisture control 8%~12%, another part is absolute dry condition；Autoclave aerated concrete building block B several groups are chosen, range of a portion moisture control 8%~12%, another part is absolute dry condition；Step 2 tests each compressive strength of aerated autoclaved concrete blocks；Step 3 obtains the compression strength relational expression of the autoclave aerated concrete building block for the autoclave aerated concrete building block and absolute dry condition that two groups of moisture content are 8%~12%；Step 4, comprehensive analysis obtain the compression strength under 8%~12% state and the compression strength relational expression under absolute dry condition；Step 5 verifies relational expression in step 4.The present invention solves condition difficulty needed for traditional compressive strength of aerated autoclaved concrete blocks is tested and realizes, and tests age longer technical problem.
Description
Technical field
The present invention relates to the field of building materials, and in particular to a kind of side for measuring compressive strength of aerated autoclaved concrete blocks
Method.
Background technique
In recent years, autoclave aerated concrete building block relies on the advantage of light thermal-insulation, it has also become realizes building energy efficiency target
Ideal materials for wall, is widely used in civil building.However building block is during inspection that there are still some problems, builds
The Specifeca tion speeification of block is compression strength and dry density, and the influence of the compression strength of building block is very sensitive to moisture content.If
Measurement data inaccuracy is in time, it is likely that very big loss is brought to engineering.GB/T11968~2009 " steam-pressing aero-concrete
Method for testing performance " require in standard the water content of block of detection compression strength should be in 8%~12% range, otherwise pressure resistance
Degree is invalid, needs sample presentation again.So the moisture content for how controlling building block just becomes most important.Laboratory testing side at present
Method is mainly divided to two kinds: first method is that first building block dries to constant weight, of short duration soaked baking later to desired moisture content.Second
Kind method is the average moisture content and average dry density that building block is obtained using dry density test, when the average moisture content of building block is greater than
It when 12%, is dried in the baking oven of (60 ± 5) DEG C, when water content of block closes on 8%~12%, increases pendulous frequency until aqueous
Rate is met the requirements, when moisture content is less than 8%, it is of short duration it is soaked after be dried to and require moisture content.The common of above two method lacks
Point is: on the one hand since building block is very uneven, the moisture content and dry density of each building block is different, takes a part for the whole；Another party
During interview part is dried to and requires moisture content, testing staff needs to take a significant amount of time with energy to measure, and is easy to
The time for requiring moisture content is missed, working efficiency is low.
Summary of the invention
The object of the present invention is to provide a kind of methods for measuring compressive strength of aerated autoclaved concrete blocks, to solve tradition
Compressive strength of aerated autoclaved concrete blocks test needed for condition it is relatively difficult to achieve, and test age longer technical problem.
To achieve the above object, the present invention adopts the following technical scheme that.
A method of measurement compressive strength of aerated autoclaved concrete blocks, including steps are as follows.
Step 1 chooses autoclave aerated concrete building block A several groups, and is divided into two parts: portion is steam pressurized coagulation
Earth building blocks A1, another is autoclave aerated concrete building block A2；By autoclave aerated concrete building block A1Moisture control 8%
~12% range, and by autoclave aerated concrete building block A2Drying most absolute dry condition；Meanwhile choosing steam pressurized coagulation
Earth building blocks B several groups, and it is divided into two parts: portion is autoclave aerated concrete building block B1, another is steam-pressing aero-concrete
Building block B2；By autoclave aerated concrete building block B1Range of the moisture control 8%~12%, and by steam pressurized coagulation
Earth building blocks B2Drying most absolute dry condition.
Step 2 tests each autoclave aerated concrete building block A respectively1Compression strength be y1、y2……yn, obtain steaming
Pressing aero-concrete building block A1Compression strength average value beEach autoclave aerated concrete building block A is tested respectively2Pressure resistance
Degree is x1、x2……xn, obtain autoclave aerated concrete building block A2Compression strength average value beMeanwhile it testing respectively each
Autoclave aerated concrete building block B1Compression strength be y1’、y2’……yn', obtain autoclave aerated concrete building block B1Pressure resistance
Spending average value isAlso, each autoclave aerated concrete building block B is tested respectively2Compression strength be x1’、x2’……xn', it obtains
Autoclave aerated concrete building block B out2Compression strength average value be
Step 3 obtains autoclave aerated concrete building block A according to linear equation1Compression strength and steam-pressing aero-concrete
Building block A2Compression strength relational expression be y=b1x+a1；Meanwhile autoclave aerated concrete building block B is obtained according to linear equation1
Compression strength and autoclave aerated concrete building block B2Compression strength relational expression be y '=b2x’+a2。
Step 4, by the data of the autoclave aerated concrete building block A measured in step 2 and autoclave aerated concrete building block B
Data carry out comprehensive analysis, obtain the compression strength and absolute dry condition of autoclave aerated concrete building block under 8%~12% state
The compression strength relational expression Y=bX+a of lower autoclave aerated concrete building block.
Step 5 verifies the relational expression Y=bX+a in step 4:
Autoclave aerated concrete building block A ' the several groups of same producer's different batches are chosen, and are divided into two parts: Yi Fenwei
Autoclave aerated concrete building block A '1, another is autoclave aerated concrete building block A '2；Autoclave aerated concrete building block A '1Contain
The control of water rate measures its compression strength P in 8%~12% rangeA’Actual measurement 1；Autoclave aerated concrete building block A '2It dries most exhausted
Dry state, measures its compression strength PA’Actual measurement 2；Then by PA’Actual measurement 2Bring into relational expression Y=bX+a extrapolate moisture content be 8%~
Autoclave aerated concrete building block A ' under 12% state1Compression strength PA’Calculate 1；Analyze PA’Calculate 1With PA’Actual measurement 1, it is accurate to verify it
Degree；
Autoclave aerated concrete building block B ' the several groups of same producer's different batches are chosen, and are divided into two parts: Yi Fenwei
Autoclave aerated concrete building block B '1, another is autoclave aerated concrete building block B '2；Autoclave aerated concrete building block B '1Contain
The control of water rate measures its compression strength P in 8%~12% rangeB’Actual measurement 1；Autoclave aerated concrete building block B '2It dries most exhausted
Dry state, measures its compression strength PB’Actual measurement 2；Then by PB’Actual measurement 2Bring into relational expression Y=bX+a extrapolate moisture content be 8%~
Autoclave aerated concrete building block B ' under 12% state1Compression strength PB’Calculate 1；Analyze PB’Calculate 1With PB’Actual measurement 1, it is accurate to verify it
Degree.
Step 6 works as PA’Calculate 1With PA’Actual measurement 1Difference within the scope of specified value when, and PB’Calculate 1With PB’Actual measurement 1Difference advising
When in limits, relational expression Y=bX+a is moisture content autoclave aerated concrete building block resistance to compression under 8%~12% range
Compressive strength of aerated autoclaved concrete blocks relationship under intensity and absolute dry condition.
Autoclave aerated concrete building block to be measured is dried to absolute dry condition by step 7, and measuring its compression strength is POver dry,
Then by POver dryIt brings into relational expression Y=bX+a, that is, finds out the compression strength under 8%~12% state of standard requirements moisture content
PStandard。
Preferably, in step 1, autoclave aerated concrete building block A chooses at least 100 groups, and is equally divided into two parts:
Wherein, autoclave aerated concrete building block A1At least 50 groups, autoclave aerated concrete building block A2At least 50 groups；It is steam pressurized mixed
Solidifying earth building blocks B chooses at least 100 groups, and is equally divided into two parts: where autoclave aerated concrete building block B1At least 50
Group, autoclave aerated concrete building block B2At least 50 groups.
Preferably, in step 2, autoclave aerated concrete building block A1Compression strength and autoclave aerated concrete building block B1's
The test method of compression strength, including steps are as follows.
Step 1, measurement sample dimensions, and the compression area S of calculation testing piece.
Step 2 first takes at least three autoclave aerated concrete building block A1Test specimen and at least three steam-pressing aero-concretes are built
Block B1Test specimen.
Step 3, the autoclave aerated concrete building block A that will be fetched1Test specimen and autoclave aerated concrete building block B1Test specimen is put respectively
In the lower platen center of Material Testing Machine, the compression direction of test specimen is vertical with the direction of steam pressure air-flow when production test specimen.
Step 4 starts testing machine, when top board and test specimen are close, adjusts ball seat, contacts top board with test specimen flat
Weighing apparatus.
Step 5 records peak load P up to test specimen destruction with the loading of the speed continuous uniform of 2.0 ± 0.5kN/s.
Test specimen after destruction is weighed quality by step 6, is dried to constant weight at 105 ± 5 DEG C, is calculated its moisture content.
If step 7, destroy after test specimen moisture content in the range of 8%~12%, utilize peak load P and test specimen
The compression strength that compression area S is calculated is autoclave aerated concrete building block pressure resistance of the moisture content in 8%~12% range
Degree.
It preferably,, will be steam pressurized mixed if the moisture content of the test specimen after destroying exceeds 8%~12% range in step 7
The moisture content of solidifying earth building blocks is adjusted to desired moisture content, then tests each autoclave aerated concrete building block A respectively1Compression strength
With each autoclave aerated concrete building block B1Compression strength.
Preferably, in step 4, the data of autoclave aerated concrete building block A and the data of autoclave aerated concrete building block B
The method for carrying out comprehensive analysis is as follows: by autoclave aerated concrete building block A1Data y1、y2……ynWith steam-pressing aero-concrete
Building block B1Data y1’、y2’……yn' united analysis is carried out, show that autoclave aerated concrete building block obtains steam pressurized coagulation
Compression strength average value of the earth building blocks A and B in 8%~12% range isBy autoclave aerated concrete building block A2Data x1、
x2……xnWith autoclave aerated concrete building block B2Data x1’、x2’……xn' united analysis is carried out, obtain steam pressurized coagulation
Earth building blocks show that compression strength average value of the autoclave aerated concrete building block A and B under absolute dry condition isPass through linear regression
Obtain relational expression Y=bX+a.
Preferably, the autoclave aerated concrete building block A in step 5 chooses at least 20 groups, and is equally divided into two parts:
Wherein, autoclave aerated concrete building block A '1At least 10 groups, autoclave aerated concrete building block A '2At least 10 groups；In step 5
Autoclave aerated concrete building block B ' choose at least 20 groups, and be equally divided into two parts: where autoclave aerated concrete building block
B’1At least 10 groups, autoclave aerated concrete building block B '2At least 10 groups.
Preferably, the standard of relational expression Y=bX+a accuracy is judged in step 5 are as follows: when autoclave aerated concrete building block
Strength grade is in A3.5~A7.5, PA’Calculate 1With PA’Actual measurement 1Difference within 3%, and PB’Calculate 1With PB’Actual measurement 1Difference 3%
Within, relational expression Y=bX+a be moisture content under 8%~12% range compressive strength of aerated autoclaved concrete blocks and absolutely
Compressive strength of aerated autoclaved concrete blocks relationship under dry state；
When the strength grade of autoclave aerated concrete building block A2.5 and it is following when, PA’Calculate 1With PA’Actual measurement 1Difference 4%
Within, and PB’Calculate 1With PB’Actual measurement 1Difference within 4%, relational expression Y=bX+a is range of the moisture content 8%~12%
Compressive strength of aerated autoclaved concrete blocks relationship under lower compressive strength of aerated autoclaved concrete blocks and absolute dry condition.
Preferably, in step 6, work as PA’Calculate 1With PA’Actual measurement 1Difference exceed specified value range when or PB’Calculate 1With PB’Actual measurement 1
Difference exceed specified value range when, terminate the measurement of compressive strength of aerated autoclaved concrete blocks.
Compared with prior art the invention has the characteristics that and beneficial effect.
1, the present invention in compression strength, it is only necessary to by test specimen, drying to constant weight, then according to standard GB/T11969~
Method as defined in 2008 " steam-pressing aero-concrete method for testing performances " is tested, and goes out standard requirements using regression equation calculation
Compression strength；The invention avoid autoclave aerated concrete building block test before need to handle it is cumbersome to 8%~12% moisture content
It is relatively difficult to achieve to solve condition needed for traditional compressive strength of aerated autoclaved concrete blocks is tested for process, and test age compared with
Long technical problem.
2, since measurement test specimen moisture content is firstly the need of its dry density is measured, age is longer, and controls the process of moisture content
Also it is complex, it is easy to since test specimen moisture content causes compression strength invalid, again not in standard prescribed limit after test
Test；And operation of the present invention is simple, being conducive to autoclave aerated concrete building block enterprise controls the quality of product, and practicability is very
By force.
Specific embodiment
The method of this measurement compressive strength of aerated autoclaved concrete blocks, including steps are as follows.
Step 1 chooses autoclave aerated concrete building block A several groups, and is divided into two parts: portion is steam pressurized coagulation
Earth building blocks A1, another is autoclave aerated concrete building block A2；By autoclave aerated concrete building block A1Moisture control 8%
~12% range, and by autoclave aerated concrete building block A2Drying most absolute dry condition；Meanwhile choosing steam pressurized coagulation
Earth building blocks B several groups, and it is divided into two parts: portion is autoclave aerated concrete building block B1, another is steam-pressing aero-concrete
Building block B2；By autoclave aerated concrete building block B1Range of the moisture control 8%~12%, and by steam pressurized coagulation
Earth building blocks B2Drying most absolute dry condition.
Step 2 tests each autoclave aerated concrete building block A respectively1Compression strength be y1、y2……yn, obtain steaming
Pressing aero-concrete building block A1Compression strength average value beEach autoclave aerated concrete building block A is tested respectively2Pressure resistance
Degree is x1、x2……xn, obtain autoclave aerated concrete building block A2Compression strength average value beMeanwhile each steaming is tested respectively
Pressing aero-concrete building block B1Compression strength be y1’、y2’……yn', obtain autoclave aerated concrete building block B1Compression strength
Average value isAlso, each autoclave aerated concrete building block B is tested respectively2Compression strength be x1’、x2’……xn', it obtains
Autoclave aerated concrete building block B2Compression strength average value be
Step 3 obtains autoclave aerated concrete building block A according to linear equation1Compression strength and steam-pressing aero-concrete
Building block A2Compression strength relational expression be y=b1x+a1；Meanwhile autoclave aerated concrete building block B is obtained according to linear equation1
Compression strength and autoclave aerated concrete building block B2Compression strength relational expression be y '=b2x’+a2。
Step 4, by the data of the autoclave aerated concrete building block A measured in step 2 and autoclave aerated concrete building block B
Data carry out comprehensive analysis, obtain the compression strength and absolute dry condition of autoclave aerated concrete building block under 8%~12% state
The compression strength relational expression Y=bX+a of lower autoclave aerated concrete building block.
Step 5 verifies the relational expression Y=bX+a in step 4:
Autoclave aerated concrete building block A ' the several groups of same producer's different batches are chosen, and are divided into two parts: Yi Fenwei
Autoclave aerated concrete building block A '1, another is autoclave aerated concrete building block A '2；Autoclave aerated concrete building block A '1It is aqueous
Rate control measures its compression strength P in 8%~12% rangeA’Actual measurement 1；Autoclave aerated concrete building block A '2Drying most over dry
State measures its compression strength PA’Actual measurement 2；Then by PA’Actual measurement 2Bringing relational expression Y=bX+a into and extrapolating moisture content is 8%~12%
Autoclave aerated concrete building block A ' under state1Compression strength PA’Calculate 1；Analyze PA’Calculate 1With PA’Actual measurement 1, verify its accuracy；
The autoclave aerated concrete building block B of same producer's different batches, several groups are chosen, and are divided into two parts: Yi Fenwei
Autoclave aerated concrete building block B '1, another is autoclave aerated concrete building block B '2；Autoclave aerated concrete building block B '1Contain
The control of water rate measures its compression strength P in 8%~12% rangeB’Actual measurement 1；Autoclave aerated concrete building block B '2Drying most over dry
State measures its compression strength PB’Actual measurement 2；Then by PB’Actual measurement 2Bringing relational expression Y=bX+a into and extrapolating moisture content is 8%~12%
Autoclave aerated concrete building block B ' under state1Compression strength PB’Calculate 1；Analyze PB’Calculate 1With PB’Actual measurement 1, verify its accuracy.
Step 6 works as PA’Calculate 1With PA’Actual measurement 1Difference within the scope of specified value when, and PB’Calculate 1With PB’Actual measurement 1Difference advising
When in limits, relational expression Y=bX+a is moisture content autoclave aerated concrete building block resistance to compression under 8%~12% range
Compressive strength of aerated autoclaved concrete blocks relationship under intensity and absolute dry condition；
Work as PA’Calculate 1With PA’Actual measurement 1Difference exceed specified value range when or PB’Calculate 1With PB’Actual measurement 1Difference exceed specified value
When range, illustrate that moisture content is to steam under the compression strength of autoclave aerated concrete building block and absolute dry condition under 8%~12% state
The compression strength of pressing aero-concrete building block terminates the measurement of compressive strength of aerated autoclaved concrete blocks without linear relationship.
Step 7 works as PA’Calculate 1With PA’Actual measurement 1Difference within the scope of specified value when, and PB’Calculate 1With PB’Actual measurement 1Difference advising
When in limits, autoclave aerated concrete building block to be measured is dried to absolute dry condition, and measuring its compression strength is POver dry, so
Afterwards by POver dryIt brings into relational expression Y=bX+a, that is, finds out the compression strength P under 8%~12% state of standard requirements moisture contentStandard。
In the present embodiment, in step 1, autoclave aerated concrete building block A be same producer, same batch, same kind,
Same specification, same grade intensity rank be A3.5, the autoclave aerated concrete building block that bulk density rank is B05, steam pressure
Air-entrained concrete building block A chooses at least 100 groups, and is equally divided into two parts: where autoclave aerated concrete building block A1At least
There are 50 groups, autoclave aerated concrete building block A2At least 50 groups；Autoclave aerated concrete building block B be same producer, same batch,
Same kind, same specification, same grade intensity rank be A5.0, high-class product that bulk density rank is B06 it is steam pressurized
Concrete segment, autoclave aerated concrete building block B chooses at least 100 groups, and is equally divided into two parts: where steam pressurized
Concrete segment B1At least 50 groups, autoclave aerated concrete building block B2At least 50 groups.
In the present embodiment, in step 2, autoclave aerated concrete building block A1Compression strength and steam-pressing aero-concrete build
Block B1Compression strength test method, comprise the following steps that
Step 1 checks test specimen appearance；
Step 2, measurement sample dimensions, exact value 1mm, and the compression area S of calculation testing piece；
Step 3 first takes at least three autoclave aerated concrete building block A1Test specimen and at least three steam-pressing aero-concretes are built
Block B1Test specimen；
Step 4, the autoclave aerated concrete building block A that will be fetched1Test specimen and autoclave aerated concrete building block B1Test specimen is put respectively
In the lower platen center of Material Testing Machine, the compression direction of test specimen is vertical with the direction of steam pressure air-flow when production test specimen；
Step 5 starts testing machine, when top board and test specimen are close, adjust ball seat, makes top board and test specimen contact equilibrium；
Step 6 records peak load P up to test specimen destruction with the loading of the speed continuous uniform of 2.0 ± 0.5kN/s；
Test specimen after destruction is weighed quality by step 7, is dried to constant weight at 105 ± 5 DEG C, is calculated its moisture content；
If step 8, destroy after test specimen moisture content in the range of 8%~12%, using peak load P and test specimen by
The compression strength that pressure surface product S is calculated is compressive strength of aerated autoclaved concrete blocks of the moisture content in 8%~12% range；
Autoclave aerated concrete building block A2Compression strength and autoclave aerated concrete building block B2Compression strength test method
With autoclave aerated concrete building block A1Test specimen and autoclave aerated concrete building block B1It is identical；If the test specimen after destroying is absolute dry condition, using most
The compression strength that the compression area S of big load P and test specimen is calculated is compressive strength of aerated autoclaved concrete blocks under absolute dry condition.
The test data of step 2 such as the following table 1.
1 compression strength data of table
Linear regression is carried out according to test data:
According to the autoclave aerated concrete building block A that 50 groups of A3.5B05 moisture content are under 8%~12% state1Data ynWith
Autoclave aerated concrete building block A under absolute dry condition2Compression strength data xnIt obtains respectivelyWithIt derivesWithLine
Property regression equation be y=0.8065x+0.1331, correlation coefficient rxy 2=0.9846, correlation is higher；
According to the autoclave aerated concrete building block B that 50 groups of A5.0B06 moisture content are under 8%~12% state1Data yn’
With the autoclave aerated concrete building block B under absolute dry condition2Compression strength data xn' obtain respectivelyWithIt derivesWithEquation of linear regression be y=0.851x-0.1548, correlation coefficient rxy 2=0.9801, correlation is higher.
In the present embodiment, in step 7, if the moisture content of the test specimen after destroying exceeds 8%~12% range, by steam pressure plus
Gas concrete segment is dried to the moisture content of requirement or places humidification laboratory in (60 ± 5) DEG C adjusts its moisture content, then distinguishes
Test each autoclave aerated concrete building block A1Compression strength and each autoclave aerated concrete building block B1Compression strength.
In the present embodiment, in step 4, the data of autoclave aerated concrete building block A are with autoclave aerated concrete building block B's
The method that data carry out comprehensive analysis is as follows: by autoclave aerated concrete building block A1Data y1、y2……ynIt is mixed with steam pressurized
Solidifying earth building blocks B1Data y1’、y2’……yn' united analysis is carried out, it is steam pressurized to show that autoclave aerated concrete building block obtains
Compression strength average value of the concrete segment A and B in 8%~12% range isBy autoclave aerated concrete building block A2Number
According to x1、x2……xnWith autoclave aerated concrete building block B2Data x1’、x2’……xn' united analysis is carried out, show that steam pressure adds
Gas concrete segment show that compression strength average value of the autoclave aerated concrete building block A and B under absolute dry condition isPass through line
Property return obtain relational expression Y=0.8129X+0.1017, correlation coefficient rxy 2=0.9984.
In the present embodiment, the same grade strength rank and same bulk density rank of same producer's different batches are chosen
The same grade strength rank and same bulk density of autoclave aerated concrete building block A ' several groups and same producer's different batches
Autoclave aerated concrete building block B ' the several groups of rank, verify relational expression Y=bX+a, the data obtained such as table 2.
2 compressive strength of aerated autoclaved concrete blocks of table
In addition, also choosing the different brackets intensity rank and different volumes density of different manufacturers different batches in the present embodiment
The different brackets intensity rank and different volumes of the autoclave aerated concrete building block several groups of rank and same producer's different batches
The other autoclave aerated concrete building block several groups of density level, verify relational expression Y=bX+a, the data obtained such as 3 He of table
Table 4.
The compressive strength of aerated autoclaved concrete blocks of 3 different manufacturers of table
The compressive strength of aerated autoclaved concrete blocks of 4 different manufacturers of table
Analyze conclusion: from table 2, table 3 and table 4 it can be seen that whether same producer's different batches or different manufacturers
Compression strength in the state of the autoclave aerated concrete building block moisture content 8%~12% of A3.5, A5.0 and A7.5 strength grade
PActual measurementThe compression strength P obtained with the equation of linear regression of the compression strength under autoclave aerated concrete building block absolute dry conditionIt calculatesKnot
For fruit deviation within 3%, relational expression Y=bX+a is moisture content autoclave aerated concrete building block under 8%~12% range
Compressive strength of aerated autoclaved concrete blocks relationship under compression strength and absolute dry condition；And work as the strong of autoclave aerated concrete building block
Spend grade A2.5 and it is following when, and PB calculates 1With PActual measurementDifference within 4%, relational expression Y=bX+a is moisture content 8%
Compressive strength of aerated autoclaved concrete blocks and autoclave aerated concrete building block pressure resistance under absolute dry condition under~12% range
Degree relationship, control standard 3% and 4% is obtained by data deviation, and mainly autoclave aerated concrete building block is due to itself
Compression strength is smaller, causes error relative value larger, determines equation of linear regression for A2.5 extremely by data verification above
The accuracy of strength grade is very high between A7.5, and test method is substantially accurate.
Certainly in other the present embodiment, autoclave aerated concrete building block A ' in step 5 chooses at least 20 groups, and
And it is equally divided into two parts: where autoclave aerated concrete building block A '1At least 10 groups, autoclave aerated concrete building block A '2At least
There are 10 groups；Autoclave aerated concrete building block B ' in step 5 chooses at least 20 groups, and is equally divided into two parts: where steams
Pressing aero-concrete building block B '1At least 10 groups, autoclave aerated concrete building block B '2At least 10 groups.
Above-described embodiment is not the exhaustion of specific embodiment, can also there is other embodiments, and above-described embodiment purpose exists
In illustrating the present invention, the protection scope being not intended to limit the present invention, all applications from simple change of the present invention all fall within this
In the protection scope of invention.
Claims (8)
1. a kind of method for measuring compressive strength of aerated autoclaved concrete blocks, which is characterized in that comprise the following steps that
Step 1 chooses autoclave aerated concrete building block A several groups, and is divided into two parts: portion is that steam-pressing aero-concrete is built
Block A1, another is autoclave aerated concrete building block A2；By autoclave aerated concrete building block A1Moisture control 8%~
12% range, and by autoclave aerated concrete building block A2Drying most absolute dry condition；Meanwhile choosing steam-pressing aero-concrete
Building block B several groups, and it is divided into two parts: portion is autoclave aerated concrete building block B1, another is steam-pressing aero-concrete block
Block B2；By autoclave aerated concrete building block B1Range of the moisture control 8%~12%, and by steam-pressing aero-concrete
Building block B2Drying most absolute dry condition；
Step 2 tests each autoclave aerated concrete building block A respectively1Compression strength be y1、y2……yn, obtain steam pressurized
Concrete segment A1Compression strength average value beEach autoclave aerated concrete building block A is tested respectively2Compression strength be
x1、x2……xn, obtain autoclave aerated concrete building block A2Compression strength average value beMeanwhile each steam pressure is tested respectively and is added
Gas concrete segment B1Compression strength be y1’、y2’……yn', obtain autoclave aerated concrete building block B1Compression strength it is average
Value isAlso, each autoclave aerated concrete building block B is tested respectively2Compression strength be x1’、x2’……xn', obtain steam pressure
Air-entrained concrete building block B2Compression strength average value be
Step 3 obtains autoclave aerated concrete building block A according to linear equation1Compression strength and autoclave aerated concrete building block
A2Compression strength relational expression be y=b1x+a1；Meanwhile autoclave aerated concrete building block B is obtained according to linear equation1It is anti-
Compressive Strength and autoclave aerated concrete building block B2Compression strength relational expression be y '=b2x’+a2；
Step 4, by the number of the data of the autoclave aerated concrete building block A measured in step 2 and autoclave aerated concrete building block B
According to comprehensive analysis is carried out, obtains and steamed under the compression strength of autoclave aerated concrete building block and absolute dry condition under 8%~12% state
The compression strength relational expression Y=bX+a of pressing aero-concrete building block；
Step 5 verifies the relational expression Y=bX+a in step 4:
Choose the autoclave aerated concrete building block A ' several groups of same producer's different batches, and be divided into two parts: portion is steam pressure
Air-entrained concrete building block A '1, another is autoclave aerated concrete building block A '2；Autoclave aerated concrete building block A '1Moisture content
The range 8%~12% is controlled, its compression strength P is measuredA’Actual measurement 1；Autoclave aerated concrete building block A '2Drying most over dry shape
State measures its compression strength PA’Actual measurement 2；Then by PA’Actual measurement 2Bringing relational expression Y=bX+a into and extrapolating moisture content is 8%~12% shape
Autoclave aerated concrete building block A ' under state1Compression strength PA’Calculate 1；Analyze PA’Calculate 1With PA’Actual measurement 1, verify its accuracy；
Choose the autoclave aerated concrete building block B ' several groups of same producer's different batches, and be divided into two parts: portion is steam pressure
Air-entrained concrete building block B '1, another is autoclave aerated concrete building block B '2；Autoclave aerated concrete building block B '1Moisture content
The range 8%~12% is controlled, its compression strength P is measuredB’Actual measurement 1；Autoclave aerated concrete building block B '2Drying most over dry shape
State measures its compression strength PB’Actual measurement 2；Then by PB’Actual measurement 2Bringing relational expression Y=bX+a into and extrapolating moisture content is 8%~12% shape
Autoclave aerated concrete building block B ' under state1Compression strength PB’Calculate 1；Analyze PB’Calculate 1With PB’Actual measurement 1, verify its accuracy；
Step 6 works as PA’Calculate 1With PA’Actual measurement 1Difference within the scope of specified value when, and PB’Calculate 1With PB’Actual measurement 1Difference in specified value
When in range, relational expression Y=bX+a is moisture content compressive strength of aerated autoclaved concrete blocks under 8%~12% range
With compressive strength of aerated autoclaved concrete blocks relationship under absolute dry condition；
Autoclave aerated concrete building block to be measured is dried to absolute dry condition by step 7, and measuring its compression strength is POver dry, then
By POver dryIt brings into relational expression Y=bX+a, that is, finds out the compression strength P under 8%~12% state of standard requirements moisture contentStandard。
2. a kind of method for measuring compressive strength of aerated autoclaved concrete blocks according to claim 1, feature exist
In: in step 1, autoclave aerated concrete building block A chooses at least 100 groups, and is equally divided into two parts: where steam pressurized
Concrete segment A1At least 50 groups, autoclave aerated concrete building block A2At least 50 groups；Autoclave aerated concrete building block B chooses
At least 100 groups, and it is equally divided into two parts: where autoclave aerated concrete building block B1At least 50 groups, steam pressurized coagulation
Earth building blocks B2At least 50 groups.
3. a kind of method for measuring compressive strength of aerated autoclaved concrete blocks according to claim 1, feature exist
In: in step 2, autoclave aerated concrete building block A1Compression strength and autoclave aerated concrete building block B1Compression strength survey
Method for testing comprises the following steps that
Step 1, measurement sample dimensions, and the compression area S of calculation testing piece；
Step 2 first takes at least three autoclave aerated concrete building block A1Test specimen and at least three autoclave aerated concrete building block B1Examination
Part；
Step 3, the autoclave aerated concrete building block A that will be fetched1Test specimen and autoclave aerated concrete building block B1Test specimen is individually placed to material
Expect that the lower platen center of testing machine, the compression direction of test specimen are vertical with the direction of steam pressure air-flow when production test specimen；
Step 4 starts testing machine, when top board and test specimen are close, adjust ball seat, makes top board and test specimen contact equilibrium；
Step 5 records peak load P up to test specimen destruction with the loading of the speed continuous uniform of 2.0 ± 0.5kN/s；
Test specimen after destruction is weighed quality by step 6, is dried to constant weight at 105 ± 5 DEG C, is calculated its moisture content；
If the moisture content of the test specimen after step 7, destruction utilizes the compression of peak load P and test specimen in the range of 8%~12%
The compression strength that area S is calculated is compressive strength of aerated autoclaved concrete blocks of the moisture content in 8%~12% range.
4. a kind of method for measuring compressive strength of aerated autoclaved concrete blocks according to claim 3, feature exist
In: in step 7, if the moisture content of the test specimen after destroying exceeds 8%~12% range, by containing for autoclave aerated concrete building block
Water rate is adjusted to desired moisture content, then tests each autoclave aerated concrete building block A respectively1Compression strength and each steam pressure add
Gas concrete segment B1Compression strength.
5. a kind of method for measuring compressive strength of aerated autoclaved concrete blocks according to claim 1, feature exist
In: in step 4, the data of autoclave aerated concrete building block A and the data of autoclave aerated concrete building block B carry out comprehensive analysis
Method it is as follows: by autoclave aerated concrete building block A1Data y1、y2……ynWith autoclave aerated concrete building block B1Data
y1’、y2’……yn' united analysis is carried out, show that autoclave aerated concrete building block show that autoclave aerated concrete building block A and B exist
Compression strength average value in 8%~12% range isBy autoclave aerated concrete building block A2Data x1、x2……xnWith steaming
Pressing aero-concrete building block B2Data x1’、x2’……xn' united analysis is carried out, show that autoclave aerated concrete building block obtains
Compression strength average value of the autoclave aerated concrete building block A and B under absolute dry condition isRelational expression Y is obtained by linear regression
=bX+a.
6. a kind of method for measuring compressive strength of aerated autoclaved concrete blocks according to claim 1, feature exist
In: the autoclave aerated concrete building block A ' in step 5 chooses at least 20 groups, and is equally divided into two parts: where steam pressure adds
Gas concrete segment A '1At least 10 groups, autoclave aerated concrete building block A '2At least 10 groups；It is steam pressurized mixed in step 5
Solidifying earth building blocks B ' chooses at least 20 groups, and is equally divided into two parts: where autoclave aerated concrete building block B '1At least 10
Group, autoclave aerated concrete building block B '2At least 10 groups.
7. a kind of method for measuring compressive strength of aerated autoclaved concrete blocks according to claim 1, feature exist
In: the standard of relational expression Y=bX+a accuracy is judged in step 5 are as follows:
When the strength grade of autoclave aerated concrete building block is in A3.5~A7.5, PA’Calculate 1With PA’Actual measurement 1Difference within 3%,
And PB’Calculate 1With PB’Actual measurement 1Difference within 3%, relational expression Y=bX+a is moisture content steam pressure under 8%~12% range
Compressive strength of aerated autoclaved concrete blocks relationship under air-entrained concrete building block compression strength and absolute dry condition；
When the strength grade of autoclave aerated concrete building block A2.5 and it is following when, PA’Calculate 1With PA’Actual measurement 1Difference within 4%,
And PB’Calculate 1With PB’Actual measurement 1Difference within 4%, relational expression Y=bX+a is moisture content steam pressure under 8%~12% range
Compressive strength of aerated autoclaved concrete blocks relationship under air-entrained concrete building block compression strength and absolute dry condition.
8. a kind of method for measuring compressive strength of aerated autoclaved concrete blocks according to claim 7, feature exist
In: in step 6, work as PA’Calculate 1With PA’Actual measurement 1Difference exceed specified value range when or PB’Calculate 1With PB’Actual measurement 1Difference beyond rule
When limits, terminate the measurement of compressive strength of aerated autoclaved concrete blocks.
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