CN100520350C - Method for detecting content of river sand and fly ash in concrete mixture - Google Patents
Method for detecting content of river sand and fly ash in concrete mixture Download PDFInfo
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- CN100520350C CN100520350C CNB2005100574670A CN200510057467A CN100520350C CN 100520350 C CN100520350 C CN 100520350C CN B2005100574670 A CNB2005100574670 A CN B2005100574670A CN 200510057467 A CN200510057467 A CN 200510057467A CN 100520350 C CN100520350 C CN 100520350C
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Abstract
The invention discloses a content testing method of river sand and coal ash in the concrete mixture, which comprises the following steps: sampling; segregating rough aggregate; segregating fine aggregate; preparing the gelatinization material sample; analyzing through chemical selection solution method; calculating the content of river sand and coal ash in the concrete, wherein the rough aggregate segregation adapts wash screening method of 4.75mm standard square mesh sieve; the fine aggregate segregation adapts wash screening method of 0.15mm standard square mesh sieve; the preparation of gelatinization material sample adapts the ceramic funnel to extract and filter the gelatinization material and water mixing paste and dry the filtered cement paste in the baking oven at 105-110 deg.c to constant weight.
Description
Technical field
The present invention relates to the detection method of component concentration in the concrete mix, specifically, relate to river sand in a kind of fresh concrete, flyash content detecting method.
Background technology
At present, relevant for the national standard of concrete mix match ratio analytical approach, but this standard generally is the content (as partition method) that is used for detecting cement in the concrete, sand and stone etc. in national standard.It is big not to be suitable for the fluctuation of aggregate silt content, and with the concrete of special fine sand, mountain sand and the preparation of machine-processed sand, and can not analyze flyash content, and the Chongqing City is because the restriction of starting material condition, and in order to improve concrete performance, a large amount of special fine sand, machine-processed sand and flyash of using for guaranteeing construction quality, must have accordingly river sand, flyash content in the concrete are carried out quantitative detection method in concrete production.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, river sand in a kind of concrete mix, flyash content detecting method are provided, this detection method detection speed is fast, and detection method is simple, and testing result accurately and reliably.
For this reason, mixture river sand, flyash content detecting method comprise the following steps: in the concrete of the present invention
(1), the sampling, get the concrete mix sample, extract cement in the concrete raw material, river sand and fine coal ash sample simultaneously, cement and fine coal ash sample seal with sample sack respectively;
(2), separate coarse aggregate, getting concrete mix sample is moved on to fully to wash on the 4.75mm standard square hole screen sieves, mortar that sieves and aqueous mixtures are collected stand-by with container, the coarse aggregate on the sieve abandons;
(3), isolating fine aggregate, the mortar of above-mentioned collection and aqueous mixtures moved on to fully to wash on the 0.15mm standard square hole screen sieve, Binder Materials of sieving and aqueous mixtures are collected stand-by with container, fine aggregate on the sieve moves in 105～110 ℃ the baking oven and dries to constant weight, weighing obtains the quality of fine aggregate, and it is all standby by 0.15mm standard square hole screen that the fine aggregate after will drying then is levigate;
(4), the preparation of Binder Materials sample, the Binder Materials and the aqueous mixtures of above-mentioned collection are weighed, the brute force back that stirs is divided and to be got about slurry 5L and weigh, the slurry that branch is got moves to the filtration of bleeding of ceramic funnel, and funnel filter paper place mat is then with absolute ethanol washing at least 4 times, to stop hydrated reaction of cement, grout after filtering moved in 105～110 ℃ the baking oven and dry, claim its quality, calculate the Binder Materials quality then to constant weight;
(5), select the dissolution method analysis, calculate the content of river sand, flyash in the concrete, wherein the computing formula of river sand content is in the concrete with chemistry:
P in the formula
ShThe percentage composition of river sand in the-concrete,
R
CarefullyThe percentage composition of-step (3) gained fine aggregate acid insoluble slag,
m
sThe quality of-step (3) gained fine aggregate,
m
0-step (1) the concrete mix sample quality of getting,
R
s-step (1) is got the percentage composition of river sand sample acid insoluble slag,
P
s-step (1) the river sand sample of getting on 0.15mm standard square hole screen, tail over number percent;
The computing formula of flyash content is in the concrete:
P in the formula
FhThe percentage composition of flyash in the-concrete,
R
GlueThe percentage composition of-step (4) gained Binder Materials sample acid insoluble slag,
F
1In-step (4) the gained Binder Materials sample, the percentage composition of cement acid insoluble slag,
F
2In-step (4) the gained Binder Materials sample, the percentage composition of river sand acid insoluble slag,
m
jThe quality of-step (4) gained Binder Materials sample,
m
0-step (1) the concrete mix sample quality of getting,
R
f-step (1) the percentage composition of the fine coal ash sample of getting acid insoluble slag,
Wherein:
R in the formula
Glue Si-step (4) gained Binder Materials sample acid stripping SiO
2Percentage composition,
R
Si-step (1) cement-like of getting acid stripping SiO
2Percentage composition,
R
c-step (1) the percentage composition of the cement-like of getting acid insoluble slag,
m
sThe quality of-step (3) gained fine aggregate,
R
CarefullyThe percentage composition of-step (3) gained fine aggregate acid insoluble slag,
m
jThe quality of-step (4) gained Binder Materials sample,
P
s-step (1) the river sand sample of getting on 0.15mm standard square hole screen, tail over number percent.
The present invention adopts physics to combine with chemical method, earlier wash method with water and isolate coarse aggregate in the mixture, fine aggregate and Binder Materials layer by layer with the standard square hole screen, then with chemical selection dissolution method analysis, calculate the content of river sand, flyash in the concrete mix.By preparing three groups of standard samples, carry out test experience with the inventive method then, its testing result contrast is as shown in the table:
As can be seen from the above table, the absolute deviation of testing result is all less than 5%.
Remarkable result of the present invention is: detection method is simple, quick, easy to operate, testing result accurately and reliably, absolute deviation is less than 5%.
Description of drawings
Fig. 1 is the FB(flow block) of detection method of the present invention.
Embodiment
Below in conjunction with embodiment the present invention is described in further detail:
Embodiment 1: preparation river sand content is 10%, flyash content is 3% standard concrete sample, detects according to the inventive method then, and it detects step and is:
(1), the sampling, from the above-mentioned standard concrete sample for preparing, obtain concrete mix sample 11.75kg, extract cement in the concrete raw material, river sand and fine coal ash sample simultaneously, cement and fine coal ash sample seal with sample sack respectively;
(2), separate coarse aggregate, getting concrete mix sample is moved on to fully to wash on the 4.75mm standard square hole screen sieves, mortar that sieves and aqueous mixtures are collected stand-by with container, the coarse aggregate on the sieve abandons;
(3), isolating fine aggregate, the mortar of above-mentioned collection and aqueous mixtures moved on to fully to wash on the 0.15mm standard square hole screen sieve, Binder Materials of sieving and aqueous mixtures are collected stand-by with container, fine aggregate on the sieve moves in 105～110 ℃ the baking oven and dries to constant weight, the quality that obtains fine aggregate of weighing is 2.012kg, and it is all standby by 0.15mm standard square hole screen that the fine aggregate after will drying then is levigate;
(4), the preparation of Binder Materials sample, with the Binder Materials of above-mentioned collection and the aqueous mixtures 18.7kg that weighs, brute force stirs, and divides and gets about slurry 5L, 2.45kg weighs; The slurry that branch is got moves to the filtration of bleeding of ceramic funnel, funnel filter paper place mat is then with absolute ethanol washing at least 4 times, to stop hydrated reaction of cement, grout after filtering moved in 105～110 ℃ the baking oven and dry, claim that its quality is 0.4385kg to constant weight; Calculate Binder Materials samples weighed 3.347kg.
(5), select the dissolution method analysis, calculate the content of river sand, flyash in the concrete, wherein the computing formula of river sand content is in the concrete with chemistry:
P in the formula
ShThe percentage composition of river sand in the-concrete,
R
CarefullyThe percentage composition of-step (3) gained fine aggregate acid insoluble slag is 42.4%,
m
sThe quality of-step (3) gained fine aggregate is 2.012kg,
m
0-step (1) the concrete mix sample quality of getting is 11.75kg,
R
sThe percentage composition that-step (1) is got river sand sample acid insoluble slag is 83.75%,
P
s-step (1) the tail over number percent of the river sand sample of getting on 0.15mm standard square hole screen be 90.00%;
The percentage composition that above-mentioned numerical value substitution formula is calculated river sand in this group concrete standard sample is 9.63%, deviation-0.37%.
The computing formula of flyash content is in the concrete:
P in the formula
FhThe percentage composition of flyash in the-concrete,
R
GlueThe percentage composition of-step (4) gained Binder Materials sample acid insoluble slag is 17.76%,
F
1In-step (4) the gained Binder Materials sample, the percentage composition of cement acid insoluble slag,
F
2In-step (4) the gained Binder Materials sample, the percentage composition of river sand acid insoluble slag,
m
jThe quality of-step (4) gained Binder Materials sample is 3.347kg,
m
0-step (1) the concrete mix sample quality of getting is 11.75kg,
R
f-step (1) the percentage composition of the fine coal ash sample of getting acid insoluble slag be 100%,
Wherein:
R in the formula
Glue Si-step (4) gained Binder Materials sample acid stripping SiO
2Percentage composition be 19.27%,
R
Si-step (1) cement-like of getting acid stripping SiO
2Percentage composition be 9.62%,
R
c-step (1) the percentage composition of the cement-like of getting acid insoluble slag be 1.192%,
m
sThe quality of-step (3) gained fine aggregate is 2.012kg,
R
CarefullyThe percentage composition of-step (3) gained fine aggregate acid insoluble slag is 42.40%,
m
jThe quality of-step (4) gained Binder Materials sample is 3.347kg,
P
s-step (1) the tail over number percent of the river sand sample of getting on 0.15mm standard square hole screen be 90.00%.
The percentage composition that above-mentioned numerical value substitution formula is calculated flyash in this group concrete standard sample is 3.92%, deviation+0.92%.
Embodiment 2: preparation river sand content is 13.25%, flyash content is 1.00% standard concrete sample, detects according to the inventive method then, and it detects step and is:
(1), the sampling, from the above-mentioned standard concrete sample for preparing, obtain concrete mix sample 11.80kg, extract cement in the concrete raw material, river sand and fine coal ash sample simultaneously, cement and fine coal ash sample seal with sample sack respectively;
(2), separate coarse aggregate, getting concrete mix sample is moved on to fully to wash on the 4.75mm standard square hole screen sieves, mortar that sieves and aqueous mixtures are collected stand-by with container, the coarse aggregate on the sieve abandons;
(3), isolating fine aggregate, the mortar of above-mentioned collection and aqueous mixtures moved on to fully to wash on the 0.15mm standard square hole screen sieve, Binder Materials of sieving and aqueous mixtures are collected stand-by with container, fine aggregate on the sieve moves in 105～110 ℃ the baking oven and dries to constant weight, the quality that obtains fine aggregate of weighing is 3.165kg, and it is all standby by 0.15mm standard square hole screen that the fine aggregate after will drying then is levigate;
(4), the preparation of Binder Materials sample, with the Binder Materials of above-mentioned collection and the aqueous mixtures 25.35kg that weighs, brute force stirs, and divides and gets about slurry 5L, 3.00kg weighs; The slurry that branch is got moves to the filtration of bleeding of ceramic funnel, funnel filter paper place mat is then with absolute ethanol washing at least 4 times, to stop hydrated reaction of cement, grout after filtering moved in 105～110 ℃ the baking oven and dry, claim that its quality is 0.2088kg to constant weight; Calculate Binder Materials samples weighed 1.758kg.
(5), select the dissolution method analysis, calculate the content of river sand, flyash in the concrete, wherein the computing formula of river sand content is in the concrete with chemistry:
P in the formula
ShThe percentage composition of river sand in the-concrete,
R
CarefullyThe percentage composition of-step (3) gained fine aggregate acid insoluble slag is 51.28%,
m
sThe quality of-step (3) gained fine aggregate is 3.165kg,
m
0-step (1) the concrete mix sample quality of getting is 11.80kg,
R
sThe percentage composition that-step (1) is got river sand sample acid insoluble slag is 93.50%,
P
s-step (1) the tail over number percent of the river sand sample of getting on 0.15mm standard square hole screen be 89.35%;
The percentage composition that above-mentioned numerical value substitution formula is calculated river sand in this group concrete standard sample is 16.46%, deviation-3.21%.
The computing formula of flyash content is in the concrete:
P in the formula
FhThe percentage composition of flyash in the-concrete,
R
GlueThe percentage composition of-step (4) gained Binder Materials sample acid insoluble slag is 13.37%,
F
1In-step (4) the gained Binder Materials sample, the percentage composition of cement acid insoluble slag,
F
2In-step (4) the gained Binder Materials sample, the percentage composition of river sand acid insoluble slag,
m
jThe quality of-step (4) gained Binder Materials sample is 1.758kg,
m
0-step (1) the concrete mix sample quality of getting is 11.80kg,
R
f-step (1) the percentage composition of the fine coal ash sample of getting acid insoluble slag be 100%,
Wherein:
R in the formula
Glue Si-step (4) gained Binder Materials sample acid stripping SiO
2Percentage composition be 14.75%,
R
Si-step (1) cement-like of getting acid stripping SiO
2Percentage composition be 21.12%,
R
c-step (1) the percentage composition of the cement-like of getting acid insoluble slag be 1.69%,
m
sThe quality of-step (3) gained fine aggregate is 3.165kg,
R
CarefullyThe percentage composition of-step (3) gained fine aggregate acid insoluble slag is 51.28%,
m
jThe quality of-step (4) gained Binder Materials sample is 1.758kg,
P
s-step (1) the tail over number percent of the river sand sample of getting on 0.15mm standard square hole screen be 89.35%.
The percentage composition that above-mentioned numerical value substitution formula is calculated flyash in this group concrete standard sample is 0.18%, deviation-0.82%.
Embodiment 3: preparation river sand content is 19.67%, flyash content is 1% standard concrete sample, detects according to the inventive method then, and it detects step and is:
(1), the sampling, from the above-mentioned standard concrete sample for preparing, obtain concrete mix sample 11.70kg, extract cement in the concrete raw material, river sand and fine coal ash sample simultaneously, cement and fine coal ash sample seal with sample sack respectively;
(2), separate coarse aggregate, getting concrete mix sample is moved on to fully to wash on the 4.75mm standard square hole screen sieves, mortar that sieves and aqueous mixtures are collected stand-by with container, the coarse aggregate on the sieve abandons;
(3), isolating fine aggregate, the mortar of above-mentioned collection and aqueous mixtures moved on to fully to wash on the 0.15mm standard square hole screen sieve, Binder Materials of sieving and aqueous mixtures are collected stand-by with container, fine aggregate on the sieve moves in 105～110 ℃ the baking oven and dries to constant weight, the quality that obtains fine aggregate of weighing is 3.48kg, and it is all standby by 0.15mm standard square hole screen that the fine aggregate after will drying then is levigate;
(4), the preparation of Binder Materials sample, with the Binder Materials of above-mentioned collection and the aqueous mixtures 18.55kg that weighs, brute force stirs, and divides and gets about slurry 5L, 3.05kg weighs; The slurry that branch is got moves to the filtration of bleeding of ceramic funnel, funnel filter paper place mat is then with absolute ethanol washing at least 4 times, to stop hydrated reaction of cement, grout after filtering moved in 105～110 ℃ the baking oven and dry, claim that its quality is 0.262kg to constant weight; Calculate Binder Materials samples weighed 1.593kg.
(5), use chemistry to select the content of river sand, flyash in dissolution method analysis, the calculating concrete, wherein
The computing formula of river sand content is in the concrete:
P in the formula
ShThe percentage composition of river sand in the-concrete,
R
CarefullyThe percentage composition of-step (3) gained fine aggregate acid insoluble slag is 64.72%,
m
sThe quality of-step (3) gained fine aggregate is 3.48kg,
m
0Step (1) the concrete mix sample quality of getting is 11.70kg,
R
s-step (1) the percentage composition of the fine aggregate of getting acid insoluble slag be 93.50%,
P
s-step (1) the tail over number percent of the river sand sample of getting on 0.15mm standard square hole screen be 89.35%;
The percentage composition that above-mentioned numerical value substitution formula is calculated river sand in this group concrete standard sample is 23.04%, deviation+3.37%.
The computing formula of flyash content is in the concrete:
P in the formula
FhThe percentage composition of flyash in the-concrete,
R
GlueThe percentage composition of-step (4) gained Binder Materials sample acid insoluble slag is 22.59%,
F
1In-step (4) the gained Binder Materials sample, the percentage composition of cement acid insoluble slag,
F
2In-step (4) the gained Binder Materials sample, the percentage composition of river sand acid insoluble slag,
m
jThe quality of-step (4) gained Binder Materials sample is 1.593kg,
m
0-step (1) the concrete mix sample quality of getting is 11.70kg,
R
f-step (1) the percentage composition of the fine coal ash sample of getting acid insoluble slag be 100%,
Wherein:
R in the formula
Glue Si-step (4) gained Binder Materials sample acid stripping SiO
2Percentage composition be 14.62%,
R
Si-step (1) cement-like of getting acid stripping SiO
2Percentage composition be 21.12%,
R
c-step (1) the percentage composition of the cement-like of getting acid insoluble slag be 1.69%,
m
sThe quality of-step (3) gained fine aggregate is 3.48kg,
R
CarefullyThe percentage composition of-step (3) gained fine aggregate acid insoluble slag is 64.72%,
m
jThe quality of-step (4) gained Binder Materials sample is 1.593kg,
P
s-step (1) the tail over number percent of the river sand sample of getting on 0.15mm standard square hole screen be 89.35%.
The percentage composition that above-mentioned numerical value substitution formula is calculated flyash in this group concrete standard sample is 0.62%, deviation-0.38%.
From the result that river sand, flyash content in the standard concrete sample of preparing above-mentioned three embodiment are detected, absolute deviation is all less than 5%, thereby having improved the accuracy of testing result greatly, is a kind of detection method that building trade is worthy of popularization.
Claims (2)
1, river sand, flyash content detecting method in a kind of concrete mix is characterized in that comprising the following steps:
(1), the sampling, get the concrete mix sample, extract cement in the concrete raw material, river sand and fine coal ash sample simultaneously, cement and fine coal ash sample seal with sample sack respectively;
(2), separate coarse aggregate, getting concrete mix sample is moved on to fully to wash on the 4.75mm standard square hole screen sieves, mortar that sieves and aqueous mixtures are collected stand-by with container, the coarse aggregate on the sieve abandons;
(3), isolating fine aggregate, the mortar of above-mentioned collection and aqueous mixtures moved on to fully to wash on the 0.15mm standard square hole screen sieve, Binder Materials of sieving and aqueous mixtures are collected stand-by with container, fine aggregate on the sieve moves in 105～110 ℃ the baking oven and dries to constant weight, weighing obtains the quality of fine aggregate, and it is all standby by 0.15mm standard square hole screen that the fine aggregate after will drying then is levigate;
(4), the preparation of Binder Materials sample, the Binder Materials and the aqueous mixtures of above-mentioned collection are weighed, the brute force back that stirs is divided and to be got about slurry 5L and weigh, the slurry that branch is got moves to the filtration of bleeding of ceramic funnel, and funnel filter paper place mat is then with absolute ethanol washing at least 4 times, to stop hydrated reaction of cement, grout after filtering moved in 105～110 ℃ the baking oven and dry, claim its quality, calculate the Binder Materials quality then to constant weight;
(5), select the dissolution method analysis, calculate the content of river sand, flyash in the concrete, wherein the computing formula of river sand content is in the concrete with chemistry:
P in the formula
ShThe percentage composition of river sand in the-concrete,
R
CarefullyThe percentage composition of-step (3) gained fine aggregate acid insoluble slag,
m
sThe quality of-step (3) gained fine aggregate,
m
0-step (1) the concrete mix sample quality of getting,
R
s-step (1) is got the percentage composition of river sand sample acid insoluble slag,
P
s-step (1) the river sand sample of getting on 0.15mm standard square hole screen, tail over number percent; The computing formula of flyash content is in the concrete:
P in the formula
FhThe percentage composition of flyash in the-concrete,
R
GlueThe percentage composition of-step (4) gained Binder Materials sample acid insoluble slag,
F
1In-step (4) the gained Binder Materials sample, the percentage composition of cement acid insoluble slag,
F
2In-step (4) the gained Binder Materials sample, the percentage composition of river sand acid insoluble slag,
m
jThe quality of-step (4) gained Binder Materials sample,
m
0-step (1) the concrete mix sample quality of getting,
R
fThe sour insoluble slag percentage composition of-step (1) the fine coal ash sample of getting,
Wherein:
R in the formula
Glue Si-step (4) gained Binder Materials sample acid stripping SiO
2Percentage composition,
R
Si-step (1) cement-like of getting acid stripping SiO
2Percentage composition,
R
c-step (1) the percentage composition of the cement-like of getting acid insoluble slag,
m
sThe quality of-step (3) gained fine aggregate,
R
CarefullyThe percentage composition of-step (3) gained fine aggregate acid insoluble slag,
m
j-step (4) gained Binder Materials sample mass,
P
s-step (1) the river sand sample of getting on 0.15mm standard square hole screen, tail over number percent.
2, river sand, flyash content detecting method in the concrete mix according to claim 1, it is characterized in that each sample acid insoluble slag percentage composition adopts the cement component quantitative measurement device to record in the step (5) under 10 ± 2 ℃ constant temperature, each sample acid stripping SiO
2Percentage composition adopt the silicon molybdenum blue colourimetry to measure.
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| CN100520350C true CN100520350C (en) | 2009-07-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102269682B (en) * | 2011-05-12 | 2013-05-08 | 湖南大学 | Method for detecting mineral admixtures in freshly mixed cement paste, mortar and concrete |
| CN102275225B (en) * | 2011-05-23 | 2013-02-13 | 杨旭 | Intelligent and transportable dry-mixed mortar instant mixing platform |
| CN104990826B (en) * | 2015-07-23 | 2017-10-31 | 山东建泽混凝土有限公司 | Clay content measuring method in silt test instrument and dry sand in dry sand |
| CN105424687A (en) * | 2015-11-11 | 2016-03-23 | 中国科学院水生生物研究所 | Method for detecting biogenic silicon content in bottom sediment |
| CN106018159A (en) * | 2016-05-26 | 2016-10-12 | 廊坊市高瓷新材料科技有限公司 | Detection method for content of ceramic powder of organic ceramic mixture |
| CN107036925A (en) * | 2016-11-10 | 2017-08-11 | 哈尔滨工业大学 | The detection method of fly ash content in concrete |
| CN107621428B (en) * | 2017-09-29 | 2019-08-20 | 中国水利水电第十六工程局有限公司 | Cementitious material content assaying method suitable for limestone fine aggregate maturing |
| CN107941645B (en) * | 2017-12-15 | 2020-04-14 | 东南大学 | Method for measuring reaction degree of each substance in fly ash, silica fume and cement three-phase composite system |
| CN109115569A (en) * | 2018-07-27 | 2019-01-01 | 北京矿冶科技集团有限公司 | The epoxy resin samples preparation method tested automatically for process mineralogy |
| CN109946191A (en) * | 2019-03-29 | 2019-06-28 | 苏交科集团股份有限公司 | A kind of fresh concrete uniformity detection |
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|---|---|---|---|---|
| JP2002098686A (en) * | 2000-09-22 | 2002-04-05 | Sumitomo Osaka Cement Co Ltd | Method for pozzolan determination in cement |
| JP2003212619A (en) * | 2002-01-21 | 2003-07-30 | Kao Corp | Method of determining quality of fly ash |
| CN1595102A (en) * | 2004-07-16 | 2005-03-16 | 重庆市建筑科学研究院 | Method for detecting content of fly ash in newly stirred concrete |
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2005
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002098686A (en) * | 2000-09-22 | 2002-04-05 | Sumitomo Osaka Cement Co Ltd | Method for pozzolan determination in cement |
| JP2003212619A (en) * | 2002-01-21 | 2003-07-30 | Kao Corp | Method of determining quality of fly ash |
| CN1595102A (en) * | 2004-07-16 | 2005-03-16 | 重庆市建筑科学研究院 | Method for detecting content of fly ash in newly stirred concrete |
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