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Method for detecting content of river sand and fly ash in concrete mixture

A detection method and technology for concrete, which are applied in the preparation of test samples, weighing by removing certain components, and material analysis by observing the influence of chemical indicators, which can solve the problems of inability to analyze the content of fly ash. , to achieve the effect of accurate and reliable detection results, simple detection methods and convenient operation.

Inactive Publication Date: 2006-06-21
重庆市节能技术服务中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is not suitable for aggregate mud content fluctuations, and concrete prepared with ultra-fine sand, mountain sand and machine-made sand, and cannot analyze fly ash content. Due to the limitation of raw material conditions and in order to improve the performance of concrete in Chongqing, A large amount of ultra-fine sand, machine-made sand and fly ash are used in concrete production. In order to ensure the quality of the project, it is necessary to have a corresponding quantitative detection method for the content of river sand and fly ash in concrete.

Method used

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  • Method for detecting content of river sand and fly ash in concrete mixture
  • Method for detecting content of river sand and fly ash in concrete mixture
  • Method for detecting content of river sand and fly ash in concrete mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: preparation river sand content is 10%, fly ash content is the standard concrete sample of 3%, then detects according to the inventive method, and its detection step is:

[0042] (1), sampling, obtain 11.75kg of concrete mixture samples from the above-mentioned prepared standard concrete samples, and simultaneously extract cement, river sand and fly ash samples in the concrete raw materials, and use sample bags for cement and fly ash samples respectively seal;

[0043] (2), separate the coarse aggregate, move the sample of the concrete mixture taken to a 4.75mm standard square hole sieve to fully wash and sieve, and collect the sieved mortar and water mixture with a container for use, and the coarse aggregate on the sieve Aggregate discard;

[0044] (3), separate the fine aggregate, move the above-mentioned collected mortar and water mixture to a 0.15mm standard square hole sieve for full washing and sieving, and collect the sieved cementitious material an...

Embodiment 2

[0075] Embodiment 2: preparation river sand content is 13.25%, fly ash content is the standard concrete sample of 1.67%, then detects according to the inventive method, and its detection step is:

[0076] (1), sampling, obtain 11.80kg of concrete mixture sample from above-mentioned prepared standard concrete sample, extract cement, river sand and fly ash sample in concrete raw material simultaneously, cement and fly ash sample use sample bag respectively seal;

[0077] (2), separate the coarse aggregate, move the sample of the concrete mixture taken to a 4.75mm standard square hole sieve to fully wash and sieve, and collect the sieved mortar and water mixture with a container for use, and the coarse aggregate on the sieve Aggregate discard;

[0078] (3), separate the fine aggregate, move the above-mentioned collected mortar and water mixture to a 0.15mm standard square hole sieve for full washing and sieving, and collect the sieved cementitious material and water mixture with...

Embodiment 3

[0109] Embodiment 3: preparation river sand content is 19.67%, fly ash content is the standard concrete sample of 1%, then detects according to the inventive method, and its detection step is:

[0110] (1), sampling, obtain 11.70kg of concrete mixture samples from the above-mentioned prepared standard concrete samples, and simultaneously extract cement, river sand and fly ash samples from the concrete raw materials, and use sample bags for cement and fly ash samples respectively seal;

[0111] (2), separate the coarse aggregate, move the sample of the concrete mixture taken to a 4.75mm standard square hole sieve to fully wash and sieve, and collect the sieved mortar and water mixture with a container for use, and the coarse aggregate on the sieve Aggregate discard;

[0112] (3), separate the fine aggregate, move the above-mentioned collected mortar and water mixture to a 0.15mm standard square hole sieve for full washing and sieving, and collect the sieved cementitious materi...

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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 [0001] The invention relates to a method for detecting the content of components in concrete mixtures, in particular to a method for detecting the contents of river sand and fly ash in freshly mixed concrete. Background technique [0002] At present, there are national standards on the analysis method of concrete mixture ratio in the national standard, but this standard is generally used to detect the content of cement, sand and stone in concrete (such as separation method). It is not suitable for aggregate mud content fluctuations, and concrete prepared with ultra-fine sand, mountain sand and machine-made sand, and cannot analyze fly ash content. Due to the limitation of raw material conditions and in order to improve concrete performance in Chongqing, A large amount of ultra-fine sand, machine-made sand and fly ash are used in concrete production. In order to ensure the quality of the project, it is necessary to have a corresponding quantitative detection m...

Claims

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Application Information

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IPC IPC(8): G01N5/04G01N1/34G01N21/78G06F19/00
Inventor 吴建华杨渝兰陈恽万体智
Owner 重庆市节能技术服务中心
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