CN103698241B - The method of stone flour and cement content in quantitative measurement artificial sand or mixed sand - Google Patents
The method of stone flour and cement content in quantitative measurement artificial sand or mixed sand Download PDFInfo
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Abstract
The invention provides a kind of method of stone flour and cement content in quantitative measurement artificial sand or mixed sand, belong to building field.Comprise the steps: mud powder and stone flour total content ω in (1) test artificial sand or mixed sand
always, total MB value a of mud powder and stone flour, if clay powder content is ω
n, content of stone powder is ω
s; (2) pure artificial sand or pure mixed sand is prepared; (3) get a certain amount of pure artificial sand or pure mixed sand i part, in every part, add a certain amount of stone flour, measure the MB value b of every part of stone flour
i, average
(4) get a certain amount of pure artificial sand or pure mixed sand j part, in every part, add a certain amount of mud powder, test every part of clay powder content x
jwith MB value y
j, obtain the regression equation of MB value and clay powder content, be set to y=c+dx; (5) according to following formula determination content of stone powder ω
swith clay powder content ω
n: <maths num=" 0001 " >
</maths> ω
s=ω
always-ω
nadopt the method for the invention can to solve in prior art and can not calculate the problem of mud powder and content of stone powder in artificial sand or mixed sand by simultaneous quantitative.
Description
Technical field
The present invention relates to a kind of method of stone flour and cement content in quantitative measurement artificial sand or mixed sand.Belong to building field.
Background technology
Along with the exhaustion of natural resources and the attention of Environmental protection; the ratio of the reinforcement of concrete natural sand is all being the trend of successively decreasing year by year in Beijing and even the whole nation; for solving the imbalance between supply and demand of natural sand, as the substitute of natural sand---artificial sand or mixed sand (i.e. the potpourri of artificial sand and natural sand) are arisen at the historic moment.Match therewith, new sandstone standard has been formulated or has been revised in country and place in succession, and object is the reasonable employment of better guidance and specification artificial sand or mixed sand.But find in artificial sand or mixed sand use procedure, except by except grain type is bad, rough surface, fineness are partially thick restriction, also have an important factor to be exactly lack of standardization due in exploitation and process, cause the content of stone flour and mud (particle of particle diameter below 75 μm is referred to as stone flour and mud) in artificial sand or mixed sand all higher.
But the stone flour in artificial sand or mixed sand and the mud effect difference in concrete is larger.Stone flour, on the one hand due to its huge specific surface area, can increase concrete water consumption, on the other hand, because it belongs to tiny spheric grain, therefore also have shape effect, can improve concrete workability.If use proper to stone flour, concrete combination property can be made to improve.But the mud contained in artificial sand or mixed sand then has adverse effect to concrete performance, certainly strictly should limit, so just be necessary to know stone flour and mud content separately in artificial sand or mixed sand, be beneficial to the quality control of mixed earth.
In prior art, be all carry out according to the method specified in standard GB/T14684-2011 to the mensuration of stone flour and cement content in artificial sand or mixed sand.Specify in standard GB/T14684-2011, the method that the assay method of stone flour and cement content adopts methylenum careuleum to dip in dye test is carried out.But when dipping in dye test determination stone flour and cement content by methylenum careuleum, it simply can only judge that artificial sand or mixed sand are based on stone flour, or based on mud, and quantitative measurement or calculating can not provide its content separately.Easy like this artificial sand or the mixed sand of causing is in application process, originally thought that strictly limiting silt content result but limited the helpful content of stone powder of concrete performance, or simply press regulation enforcement in the lump to the two, result but result in the unnecessary increase of materials processing cost.
Summary of the invention
Technical matters to be solved by this invention is when solving prior art to stone flour in artificial sand or mixed sand and cement content mensuration, quantitative measurement cannot provide its content separately, so provide a kind of can the assay method of stone flour and cement content in quantitative measurement artificial sand and mixed sand.
In order to solve the problems of the technologies described above, the invention provides a kind of method of stone flour and cement content in quantitative measurement artificial sand or mixed sand, comprising the steps:
(1) method specified according to standard GB/T14684-2011 tests total MB value of mud powder and stone flour total content and mud powder and stone flour in artificial sand or mixed sand, and the test result of mud powder and stone flour total content is ω
always, the test result of total MB value of mud powder and stone flour is a, and setting clay powder content in described artificial sand or mixed sand is ω
n, content of stone powder is ω
s;
(2) get artificial sand or mixed sand, after soaking respectively, remove the mud powder in artificial sand or mixed sand and stone flour, then dry, screen out the particle being greater than 2.36mm, obtain pure artificial sand or pure mixed sand respectively;
(3) above-mentioned pure artificial sand or pure mixed sand i part is got, 1st, the pure artificial sand of i part or the parts by weight of pure mixed sand are respectively 200 weight portions, [200-(i-1) × m] weight portion, successively to the 1st, 0 weight portion is added in the artificial sand that i part is pure or pure mixed sand, the stone flour of [(i-1) × m] weight portion, specify according to GB/T14684-2011 standard, described in sequentially determining the 1st, i part is mixed with the methylenum careuleum MB value of stone flour in the artificial sand of stone flour or mixed sand, test result is respectively b
1..., b
i, get b
1..., b
imean value
,
(4) above-mentioned pure artificial sand or mixed sand j part is got, 1st ..., the pure artificial sand of j part or mixed sand parts by weight be respectively 200 weight portions ..., [200-(j-1) × n] weight portion, successively to the 1st ..., add in the pure artificial sand of j part or mixed sand 0 weight portion ..., [(j-1) × n] weight portion mud powder, calculate described 1st ..., j part is mixed with the mass percentage of mud powder in the artificial sand of mud powder or mixed sand, result of calculation is respectively x
1..., x
j, according to GB/T14684-2011 standard regulation, described in sequentially determining the 1st ..., j part is mixed with the methylenum careuleum MB value of mud powder in the artificial sand of mud powder or mixed sand, test result is followed successively by y
1..., y
j, according to y
jwith x
jlinear regression relation, obtain the methylenum careuleum MB value of mud powder and the regression equation of clay powder content, be set to y=c+dx, related coefficient is R, described R > 0.99;
(5) according to the artificial sand in following formula determining step (1) or the content of stone powder ω in mixed sand
swith clay powder content ω
n:
ω
s=ω
always-ω
n
Wherein, i be more than or equal to 2 natural number; M is non-zero natural number; J be more than or equal to 2 natural number; N is non-zero natural number.
Preferably, described i and m meets [(i-1) × m]/200≤0.15.
Preferably, described j and n meets [(j-1) × n]/200≤0.09.
Further preferred described i is 4, and described m is 10, and described j is 7, and described n is 3.
The present invention compared with prior art tool has the following advantages:
(1) method of stone flour and cement content in quantitative measurement artificial sand of the present invention or mixed sand, after artificial sand or mixed sand are soaked respectively, remove the mud powder in artificial sand or mixed sand and stone flour, obtain the pure artificial sand or the mixed sand that contain mud powder and stone flour hardly; And then get the pure artificial sand of a certain amount of i part or pure mixed sand, respectively to wherein adding a certain amount of stone flour, specify according to GB/T14684-2011 standard again, measure described 1st ..., i part is mixed with stone flour methylenum careuleum MB value in the artificial sand of a certain amount of stone flour or mixed sand, known by test result, stone flour methylenum careuleum MB value does not change with the change of content of stone powder substantially, illustrates that methylene blue test is insensitive to content of stone powder; Get the pure artificial sand of a certain amount of j part or mixed sand again, after wherein adding a certain amount of mud powder, specify according to GB/T14684-2011 standard, measure described 1st ..., j part is mixed with mud powder methylenum careuleum MB value in the artificial sand of a certain amount of mud powder or mixed sand, known by test result, the mud powder methylenum careuleum MB value of i part and its clay powder content have good linear dependence, after linear regression, can obtain the methylenum careuleum MB value of mud powder and the regression equation of clay powder content, the correlativity of regression equation is fine.And by measuring the content ω of total stone flour and mud powder in artificial sand or mixed sand
alwayswith total MB value a, utilize the formula set up can calculate respective content respectively, solving in standard the two can not the problem that calculates of simultaneous quantitative, is conducive to Zhi Sha unit and ready-mixed concrete enterprise carries out quality control.By proving the demonstration test of mixed sand, the computing formula of foundation is reliable, and has certain applicability.
Accompanying drawing explanation
Fig. 1 is the MB value y of the artificial sand in embodiment 1 under different clay powder content
iwith clay powder content x
igraph of relation;
Fig. 2 is the MB value y of the artificial sand in embodiment 2 under different clay powder content
iwith clay powder content x
igraph of relation;
Fig. 3 is the MB value y of the artificial sand in embodiment 3 under different clay powder content
iwith clay powder content x
igraph of relation;
Fig. 4 is the MB value y of the mixed sand in checking example under different clay powder content
iwith clay powder content x
igraph of relation.
Embodiment
Below in conjunction with embodiment, the present invention is further described in detail, but is not limited to this.
In the artificial sand specified in standard GB/T14684-2011 or mixed sand, the method for testing of total MB value of mud powder and stone flour is as follows:
A) get the artificial sand of 400g, put into baking oven and dry to constant at (105 ± 5) DEG C, to be cooled to room temperature, screen out the particle being greater than 2.36mm for subsequent use;
B) the sample 200g after above-mentioned process is taken, be accurate to 0.1g, sample is poured in the beaker filling (500 ± 5) mL distilled water, 5min is stirred with (600 ± 60) r/min rotating speed with turbine stirrer, form suspending liquid, then continue to stir, until off-test with (400 ± 40) r/min rotating speed;
C) 5mL methylene blue solution is added in suspending liquid, stir at least after 1min with (400 ± 40) r/min rotating speed, a suspending liquid (hanging drop of getting should make sediment diameter in 8mm ~ 12mm) is picked with glass bar, dripping (is placed on sky beaker or other suitable stilts in filter paper, with make its surface not with any solid or liquid comes into contact) on, tinge is there is not around weak sediment, add 5mL methylene blue solution again, continue to stir 1min, a suspending liquid is picked again with glass bar, drip on filter paper, if there is tinge not yet around sediment, repeat above-mentioned steps, until occur around sediment that about 1mm's stablizes light blue tinge.Now, should continue to stir, do not add methylene blue solution, every 1min is once infected with test.If tinge disappears in 4min, then add 5mL methylene blue solution; If tinge disappears at 5min, then adds 2mL methylene blue solution, in two kinds of situations, all should proceed stir and be infected with test, until the sustainable 5min of tinge;
D) record the methylene blue solution cumulative volume added when tinge continues 5min, be accurate to 1mL;
E) methylenum careuleum MB value is calculated as follows total MB value of stone flour and mud powder in sample:
Wherein, MB-methylene blue number, g/kg, represents the methylenum careuleum grams that every kilogram of 0 ~ 2.36mm grade sample consumes;
G-sample mass, g
The total amount of the methylene blue solution of V-add, mL.
Relevant regulations in establishing criteria GB/T14684-2011, the total content ω of mud powder and stone flour in artificial sand or mixed sand
alwaysmethod of testing as follows:
A) get 1100g artificial sand or mixed sand, put and dry to constant at (500 ± 5) DEG C in an oven, to be cooled for subsequent use to room temperature.
B) 500g (m is taken
0) artificial sand or mixed sand, be accurate to 0.1g, pour into and eluriate in container, injected clear water, makes the water surface be about 150mm higher than sample face, after stirring, soak 2h, then in water, eluriate sample with hand, make dirt bits, mud is separated with sand grains with clay, muddy water is slowly poured into (1.18mm sieve is placed on above 75 μm of sieves) on the bushing screen of 1.18mm and 75 μm, the particle that elimination is less than 75 μm.Before test, water-wet first should be used in the two sides of sieve, and in whole process, care should be used to prevents sand grains to run off.
C) again to injected clear water in container, aforesaid operations is repeated, till the water range estimation in container is limpid.
D) particulate on sieve is remained in water wash, and 75 μm of sieves are placed on the waggle that (makes the water surface slightly exceed the upper surface of sand grains in sieve) in water, fully to wash the particle being less than 75 μm off, then the sample enamel tray of falling people in the lump cleaned in the sieved particles and clean container that two are sieved, put and dry to constant at (105 scholar 5) DEG C in an oven, to be cooled to room temperature, weigh, be designated as m
1, be accurate to 0.1g.
E) the total content ω of mud powder and stone flour is calculated as follows
always:
In formula: ω
always---the total content of mud powder and stone flour, %
M
0---the quality of test front baking dry sample, g;
M
1---the quality of test post-drying sample, g.
embodiment 1
(1) artificial sand to be measured is pressed above-mentioned standard GB/T14684-2011 predetermined processing, get the artificial sand 200g to be determined after process, the total MB value a testing mud powder and stone flour in described artificial sand according to the concrete method of testing specified in standard GB/T14684-2011 is 0.62, and the total content ω of mud powder and stone flour
alwaysbe 5.7%;
(2) take fully the artificial sand of enough weight, clean according to the correlation technique specified in standard GB/T14684-2011.Concrete cleaning method is as follows: take 500g at every turn, pour into and eluriate in container, note people clear water, make the water surface be about 150mm higher than sample face, after stirring, soak 2h, then in water, sample is eluriated with hand, make that dirt is considered to be worth doing, mud is separated with sand grains with clay, muddy water is slowly poured into (1.18mm sieve is placed on above 75 μm of sieves) on the bushing screen of 1.18mm and 75 μm, the particle that elimination is less than 75 μm.Before test, water-wet first should be used in the two sides of sieve, and in whole process, care should be used to prevents sand grains to run off.In container, note people's clear water again, repeat aforesaid operations, till the water range estimation in container is limpid.The particulate on sieve is remained in water wash, and 75 μm of sieves are placed on the waggle that (makes the water surface slightly exceed the upper surface of sand grains in sieve) in water, fully to wash the particle being less than 75 μm off, then the sample enamel tray of falling people in the lump cleaned in the sieved particles and clean container that two are sieved, put constant at (105 scholar 5) DEG C in an oven, to be cooled for subsequent use to room temperature.All oven dry and cooled artificial sand mix, screen out the particle being greater than 2.36mm, obtain pure artificial sand;
(3) artificial sand pure in above-mentioned steps (2) 4 parts (i.e. i=4) is got, the heavy 200g of 1st part of artificial sand (namely i is 1, m is 10), the 2nd part of heavy 190g of artificial sand (namely i is 2, m is 10), the 3rd part of artificial sand weight 180g (namely i is 3, m is 10), the 4th part of artificial sand weight 170g (namely i is 4, m is 10), the stone flour adding the stone flour of 0g successively in the 1st part of artificial sand, add the stone flour of 10g in the 2nd part of artificial sand, add the stone flour of 20g in the 3rd part of artificial sand, add 30g in the 4th part of artificial sand.The MB value of the artificial sand under above-mentioned 1st, 2,3, the 4 part of different stone powder mixing quantity of method test that establishing criteria GB/T14684-2011 specifies, test result is as follows: b
1be 0.23, b
2be 0.25, b
3be 0.24, b
4be 0.26,
;
(4) the pure artificial sand 7 parts (i.e. j=7) in above-mentioned steps (2) is got, (namely j is 1 to the 1st part of heavy 200g of artificial sand, n is 3), (namely j is 2 to the 2nd part of heavy 197g of artificial sand, n is 3), (namely j is 3 to the 3rd part of heavy 194g of artificial sand, n is 3), (namely j is 4 to the 4th part of heavy 191g of artificial sand, n is 3), (namely j is 5 to the 5th part of heavy 188g of artificial sand, n is 3), (namely j is 6 to the 6th part of heavy 185g of artificial sand, n is 3), (namely j is 7 to the 7th part of heavy 182g of artificial sand, n is 3), the mud powder of 0g is added successively in the 1st part of artificial sand, the mud powder of 3g is added in the 2nd part of artificial sand, the mud powder of 6g is added in the 3rd part of artificial sand, the mud powder of 9g is added in the 4th part of artificial sand, the mud powder of 12g is added in the 5th part of artificial sand, the mud powder of 15g is added in the 6th part of artificial sand, the mud powder of 18g is added in the 7th part of artificial sand.Calculate described 1st, 2,3,4,5,6, the 7 part of mass percentage being mixed with mud powder in the artificial sand of mud powder, result of calculation is respectively the mass percentage x that the 1st part is mixed with mud powder in the artificial sand of mud powder
1=0, the 2nd part of mass percentage x being mixed with mud powder in the artificial sand of mud powder
2=1.5wt%, the 3rd part of mass percentage x being mixed with mud powder in the artificial sand of mud powder
3=3wt%, the 4th part of mass percentage x being mixed with mud powder in the artificial sand of mud powder
4=4.5wt%, the 5th part of mass percentage x being mixed with mud powder in the artificial sand of mud powder
5=6wt%, the 6th part of mass percentage x being mixed with mud powder in the artificial sand of mud powder
6=7.5wt%, the 7th part of mass percentage x being mixed with mud powder in the artificial sand of mud powder
7=9wt%, the MB value of the artificial sand under above-mentioned 1st, 2,3,4,5,6, the 7 part of different mud powder volume of method test that establishing criteria GB/T14684-2011 specifies, test result is as follows: y
1=0.25, y
2=0.34, y
3=0.58, y
4=0.62, y
5=0.85, y
6=0.91, y
7=1.10, according to the MB value y of the artificial sand under different clay powder content
iwith clay powder content x
ido graph of relation, as shown in Figure 1, according to y
jwith x
jlinear regression relation, obtain the methylenum careuleum MB value of mud powder and the regression equation of clay powder content, be set to y=0.2471+0.0933x, coefficient R=0.992;
(5) according to the content of stone powder ω in the artificial sand in following formula determining step (1)
s=4.3% and clay powder content ω
n=1.4%:
ω
s=ω
always-ω
n
embodiment 2
(1) get artificial sand, the total MB value a testing mud powder and stone flour in described artificial sand according to the concrete method of testing of GB/T14684-2011 regulation in standard is 0.65, and the total content ω of mud powder and stone flour
alwaysbe 6.0;
(2) amount of taking fully artificial sand, cleans according to the cleaning method specified in the standard GB/T14684-2011 described in embodiment 1, obtains pure artificial sand;
(3) above-mentioned pure artificial sand 4 parts (i.e. i=4) is got, the heavy 200g of 1st part of artificial sand (namely i is 1, m is 5), the 2nd part of heavy 195g of artificial sand (namely i is 2, m is 5), the 3rd part of artificial sand weight 190g (namely i is 3, m is 5), the 4th part of artificial sand weight 185g (namely i is 4, m is 5), the stone flour adding the stone flour of 0g successively in the 1st part of artificial sand, add the stone flour of 5g in the 2nd part of artificial sand, add the stone flour of 10g in the 3rd part of artificial sand, add 15g in the 4th part of artificial sand.The MB value of the artificial sand under above-mentioned 1st, 2,3, the 4 part of different stone powder mixing quantity of method test that establishing criteria GB/T14684-2011 specifies, test result is as follows: b
1be 0.23, b
2be 0.254, b
3be 0.26, b
4be 0.26,
;
(4) above-mentioned pure artificial sand 6 parts (i.e. j=6) is got, (namely j is 1 to the 1st part of heavy 200g of artificial sand, n is 2), (namely j is 2 to the 2nd part of heavy 198g of artificial sand, n is 2), (namely j is 3 to the 3rd part of heavy 196g of artificial sand, n is 2), (namely j is 4 to the 4th part of heavy 194g of artificial sand, n is 2), (namely j is 5 to the 5th part of heavy 192g of artificial sand, n is 2), (namely j is 6 to the 6th part of heavy 190g of artificial sand, n is 2), the mud powder of 0g is added successively in the 1st part of artificial sand, the mud powder of 2g is added in the 2nd part of artificial sand, the mud powder of 4g is added in the 3rd part of artificial sand, the mud powder of 6g is added in the 4th part of artificial sand, the mud powder of 8g is added in the 5th part of artificial sand, the mud powder of 10g is added in the 6th part of artificial sand.Calculate described 1st, 2,3,4,5, the 6 part of mass percentage being mixed with mud powder in the artificial sand of mud powder, result of calculation is respectively the mass percentage x that the 1st part is mixed with mud powder in the artificial sand of mud powder
1=0, the 2nd part of mass percentage x being mixed with mud powder in the artificial sand of mud powder
2=1wt%, the 3rd part of mass percentage x being mixed with mud powder in the artificial sand of mud powder
3=2wt%, the 4th part of mass percentage x being mixed with mud powder in the artificial sand of mud powder
4=3wt%, the 5th part of mass percentage x being mixed with mud powder in the artificial sand of mud powder
5=4wt%, the 6th part of mass percentage x being mixed with mud powder in the artificial sand of mud powder
6=5wt%, the MB value of the artificial sand under above-mentioned 1st, 2,3,4,5, the 6 part of different mud powder volume of method test that establishing criteria GB/T14684-2011 specifies, test result is as follows: y
1=0.24, y
2=0.35, y
3=0.41, y
4=0.55, y
5=0.61, y
6=0.71, according to the MB value y of the artificial sand under different clay powder content
iwith clay powder content x
ido graph of relation, as shown in Figure 2, according to y
jwith x
jlinear regression relation, obtain the methylenum careuleum MB value of mud powder and the regression equation of clay powder content, be set to y=0.2448+0.0934x, coefficient R=0.995;
(5) according to the content of stone powder ω in the artificial sand in following formula determining step (1)
s=4.3 and clay powder content ω
n=1.7:
ω
s=ω
always-ω
n
embodiment 3
(1) get artificial sand, the total MB value a testing mud powder and stone flour in described artificial sand according to the concrete method of testing of GB/T14684-2011 regulation in standard is 0.60, and the total content ω of mud powder and stone flour
alwaysbe 5.7;
(2) amount of taking fully artificial sand, cleans according to the cleaning method specified in the standard GB/T14684-2011 described in embodiment 1, obtains pure artificial sand;
(3) above-mentioned pure artificial sand 6 parts (i.e. i=6) is got, the heavy 200g of 1st part of artificial sand (namely i is 1, m is 7), the 2nd part of heavy 193g of artificial sand (namely i is 2, m is 7), the 3rd part of heavy 186g of artificial sand (namely i is 3, m is 7), the 4th part of artificial sand weigh 179g (namely i is 4, m be 7), the 5th part of artificial sand weighs 172g (namely i is 5, m is 7), the 6th part of artificial sand weighs 165g (namely i is 6, m is 7); The stone flour adding 0g successively in the 1st part of artificial sand, the stone flour adding 7g in the 2nd part of artificial sand, add in the 3rd part of artificial sand 14g stone flour, add in the 4th part of artificial sand 21g stone flour, in the 5th part of artificial sand, add the stone flour of 28g, in the 6th part of artificial sand, add the stone flour of 35g.The MB value of the artificial sand under above-mentioned 1st, 2,3,4,5, the 6 part of different stone powder mixing quantity of method test that establishing criteria GB/T14684-2011 specifies, test result is as follows: b
1be 0.24, b
2be 0.23, b
3be 0.25, b
4be 0.26, b
5be 0.25, b
6be 0.26,
;
(4) above-mentioned pure artificial sand 5 parts (i.e. j=5) is got, (namely j is 1 to the 1st part of heavy 200g of artificial sand, n is 6), (namely j is 2 to the 2nd part of heavy 194g of artificial sand, n is 6), (namely j is 3 to the 3rd part of heavy 188g of artificial sand, n is 6), (namely j is 4 to the 4th part of heavy 182g of artificial sand, n is 6), (namely j is 5 to the 5th part of heavy 176g of artificial sand, n is 6), the mud powder of 0g is added successively in the 1st part of artificial sand, the mud powder of 6g is added in the 2nd part of artificial sand, the mud powder of 12g is added in the 3rd part of artificial sand, the mud powder of 18g is added in the 4th part of artificial sand, the mud powder of 24g is added in the 5th part of artificial sand.Calculate described 1st, 2,3,4, the 5 part of mass percentage being mixed with mud powder in the artificial sand of mud powder, result of calculation is respectively the mass percentage x that the 1st part is mixed with mud powder in the artificial sand of mud powder
1=0, the 2nd part of mass percentage x being mixed with mud powder in the artificial sand of mud powder
2=3wt%, the 3rd part of mass percentage x being mixed with mud powder in the artificial sand of mud powder
3=6wt%, the 4th part of mass percentage x being mixed with mud powder in the artificial sand of mud powder
4=9wt%, the 5th part of mass percentage x being mixed with mud powder in the artificial sand of mud powder
5=12wt%, the MB value of the artificial sand under above-mentioned 1st, 2,3,4, the 5 part of different mud powder volume of method test that establishing criteria GB/T14684-2011 specifies, test result is as follows: y
1=0.23, y
2=0.56, y
3=0.80, y
4=1.09, y
5=1.37, according to the MB value y of the artificial sand under different clay powder content
iwith clay powder content x
ido graph of relation, as shown in Figure 3, according to y
jwith x
jlinear regression relation, obtain the methylenum careuleum MB value of mud powder and the regression equation of clay powder content, be set to y=0.248+0.0937x, coefficient R=0.999;
(5) according to the content of stone powder ω in the artificial sand in following formula determining step (1)
s=4.6 and clay powder content ω
n=1.1:
ω
s=ω
always-ω
n
demonstration test:
Artificial sand, after washing and cross 75 μm of sieves, gets sieve upper part dry for standby.Get the pure artificial sand 1800g after oven dry and 200g carbonate-free lime rock dust respectively, reconfigure the artificial sand into known 10.0% content of stone powder; Separately get the known silt content of 2000g be 4.4% natural sand (dry after) and described content of stone powder be 10.0% artificial sand mixed in equal amounts evenly after obtain mixed sand, now actual content of stone powder ω ' in mixed sand
sbe 5.0%, actual clay powder content ω '
nbe 2.2%.Content of stone powder ω in this mixed sand is tested according to the method for the invention
swith clay powder content ω
n.
(1) the total MB value a testing mud powder and stone flour in described mixed sand according to the method for testing specified in GB/T14684-2011 is 0.70, and the total content ω of mud powder and stone flour
alwaysbe 7.1%;
(2) according to the relevant cleaning method specified in standard GB/T14684-2011, gradation cleaning, oven dry and cooling are carried out to mixed sand, then mixes, obtain the pure mixed sand of the q.s needed for testing;
(3) above-mentioned pure mixed sand 5 parts (i.e. i=5) is got, the heavy 200g of 1st part of mixed sand (namely i is 1, m is 6), the 2nd part of heavy 194g of mixed sand (namely i is 2, m is 6), the 3rd part of mixed sand weight 188g (namely i is 3, m is 6), (namely i is 4 to the 4th part of mixed sand weight 182g,, m is 6), the 5th part of heavy 176g of mixed sand (namely i is 5, m be 6); The stone flour adding 0g successively in the 1st part of mixed sand, the stone flour adding 6g in the 2nd part of mixed sand, add in the 3rd part of mixed sand 12g stone flour, in the 4th part of mixed sand, add the stone flour of 18g, in the 5th part of mixed sand, add the stone flour of 24g.The MB value of the mixed sand under above-mentioned 1st, 2,3,4, the 5 part of different stone powder mixing quantity of method test that establishing criteria GB/T14684-2011 specifies, test result is as follows: b
1be 0.24, b
2be 0.24, b
3be 0.25, b
4be 0.26, b
5be 0.25,
;
(4) above-mentioned pure mixed sand 4 parts (i.e. j=4) is got, the heavy 200g of 1st part of mixed sand (namely j is 1, n is 4), the 2nd part of heavy 196g of mixed sand (namely j is 2, n is 4), the 3rd part of mixed sand weight 192g (namely j is 3, n is 4), (namely j is 4 to the 4th part of mixed sand weight 188g,, n is 4), the mud powder adding the mud powder of 0g successively in the 1st part of mixed sand, add the mud powder of 4g in the 2nd part of mixed sand, add the mud powder of 8g in the 3rd part of mixed sand, add 12g in the 4th part of mixed sand.Calculate described 1st, 2,3, the 4 part of mass percentage being mixed with mud powder in the mixed sand of mud powder, result of calculation is respectively the mass percentage x that the 1st part is mixed with mud powder in the mixed sand of mud powder
1=0, the 2nd part of mass percentage x being mixed with mud powder in the mixed sand of mud powder
2=2wt%, the 3rd part of mass percentage x being mixed with mud powder in the mixed sand of mud powder
3=4wt%, the 4th part of mass percentage x being mixed with mud powder in the mixed sand of mud powder
4=6wt%, the MB value of the mixed sand under above-mentioned 1st, 2,3, the 4 part of different mud powder volume of method test that establishing criteria GB/T14684-2011 specifies, test result is as follows: y
1=0.24, y
2=0.44, y
3=0.60, y
4=0.81, according to the MB value y of the natural sand under different clay powder content
iwith clay powder content x
ido graph of relation, as shown in Figure 4, according to y
jwith x
jlinear regression relation, obtain the methylenum careuleum MB value of mud powder and the regression equation of clay powder content, be set to y=0.242+0.0935x, coefficient R=0.999;
(5) according to the content of stone powder ω in the mixed sand in following formula determining step (1)
sfor with clay powder content ω
nfor;
ω
s=ω
always-ω
n
ω as calculated
nbe 2.196%, ω
nbe 4.904%.
In the mixed sand of above-mentioned demonstration test, actual content of stone powder ω '
sbe 5.0%, the error of calculated value and actual value is-1.92%, actual clay powder content ω '
nbe 2.2%, the error of calculated value and actual value is 0.18%, and error range, within ± 2%, illustrates that method of testing is substantially accurate.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments, and thus the apparent change of extending out or variation be still among the protection domain of the invention claim.
Claims (5)
1. the method for stone flour and cement content in quantitative measurement artificial sand or mixed sand, comprises the steps:
(1) method specified according to standard GB/T14684-2011 tests total MB value of mud powder and stone flour total content and mud powder and stone flour in artificial sand or mixed sand, and the test result of mud powder and stone flour total content is ω
always, the test result of total MB value of mud powder and stone flour is a, and setting clay powder content in described artificial sand or mixed sand is ω
n, content of stone powder is ω
s;
(2) get artificial sand or mixed sand, after soaking respectively, remove the mud powder in artificial sand or mixed sand and stone flour, then dry, screen out the particle being greater than 2.36mm, obtain pure artificial sand or pure mixed sand respectively;
(3) above-mentioned pure artificial sand or pure mixed sand i part is got, 1st, the pure artificial sand of i part or the parts by weight of pure mixed sand are respectively 200 weight portions, [200-(i-1) × m] weight portion, successively to the 1st, 0 weight portion is added in the artificial sand that i part is pure or pure mixed sand, the stone flour of [(i-1) × m] weight portion, specify according to GB/T14684-2011 standard, described in sequentially determining the 1st, i part is mixed with the methylenum careuleum MB value of stone flour in the artificial sand of stone flour or mixed sand, test result is respectively b
1..., b
i, get b
1..., b
imean value
(4) above-mentioned pure artificial sand or pure mixed sand j part is got, 1st ..., the pure artificial sand of j part or pure mixed sand parts by weight be respectively 200 weight portions ..., [200-(j-1) × n] weight portion, successively to the 1st ..., add in the pure artificial sand of j part or pure mixed sand 0 weight portion ..., [(j-1) × n] weight portion mud powder, calculate described 1st ..., j part is mixed with the mass percentage of mud powder in the artificial sand of mud powder or mixed sand, result of calculation is respectively x
1..., x
j, according to GB/T14684-2011 standard regulation, described in sequentially determining the 1st ..., j part is mixed with the methylenum careuleum MB value of mud powder in the artificial sand of mud powder or mixed sand, test result is followed successively by y
1..., y
j, according to y
jwith x
jlinear regression relation, obtain the methylenum careuleum MB value of mud powder and the regression equation of clay powder content, be set to y=c+dx, related coefficient is R, described R > 0.99;
(5) according to the artificial sand in following formula determining step (1) or the content of stone powder ω in mixed sand
swith clay powder content ω
n:
ω
s=ω
always-ω
n
Wherein, i be more than or equal to 2 natural number; M is non-zero natural number; J be more than or equal to 2 natural number; N is non-zero natural number.
2. the method for stone flour and cement content in quantitative measurement artificial sand or mixed sand according to claim 1, is characterized in that, described [(i-1) × m]/200≤0.15.
3. the method for stone flour and cement content in quantitative measurement artificial sand or mixed sand according to claim 1 or 2, is characterized in that, described [(j-1) × n]/200≤0.09.
4. the method for stone flour and cement content in quantitative measurement artificial sand or mixed sand according to claim 1 or 2, it is characterized in that, described i is 4, and described m is 10, and described j is 7, and described n is 3.
5. the method for stone flour and cement content in quantitative measurement artificial sand or mixed sand according to claim 3, it is characterized in that, described i is 4, and described m is 10, and described j is 7, and described n is 3.
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| CN109187381A (en) * | 2018-08-01 | 2019-01-11 | 中建西部建设西南有限公司 | A kind of method of quick measurement Machine-made Sand MB value |
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| CN111721893B (en) * | 2020-06-29 | 2022-09-23 | 重庆大学 | Method for determining clay mineral composition and content of each component in mud powder in sand |
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| CN113686745A (en) * | 2021-09-17 | 2021-11-23 | 新疆西建科研检测有限责任公司 | Method for detecting mud content in sand |
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