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

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...

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