Silane modified polymer concrete mud inhibitor and preparation method thereof

Abstract

The invention provides a silane modified polymer concrete mud inhibitor and a preparation method thereof. The prepared silane modified polymer concrete mud inhibitor is a low-molecular-weight linear copolymer and can chemically adsorb mud by virtue of chemical bonding, the mud adsorbing capacity is high, the absorption is firm, and a certain dispersive action is further applied to mud after the absorption, so that the flowing property of a concrete system is improved; by being compound with a polycarboxylate water reducer in use, the silane modified polymer concrete mud inhibitor has a strong competitive adsorption advantage, the absorption of mud to the polycarboxylate water reducer can be obviously reduced, and adverse effects caused by mud in concrete can be effectively relieved.

Description

technical field [0001] The invention relates to the technical field of preparation and application of high-performance concrete admixtures, in particular to a silane-modified polymer concrete mud inhibitor capable of effectively alleviating the negative impact of soil on concrete and a preparation method thereof. Background technique [0002] Due to the rapid development of the concrete industry, the consumption of raw materials is increasing day by day, high-quality sand and gravel are seriously in short supply, and there are more and more inferior sand and gravel with high mud content. affect the performance of concrete. First of all, when the soil content in sand and gravel is high, the water reducing rate of polycarboxylate superplasticizer will be greatly reduced, the fluidity of concrete will drop sharply, the slump loss will be rapid, and the transportable time will be greatly shortened, so it is difficult to guarantee Transportation, pumping and construction require...

AI Technical Summary

Problems solved by technology

First of all, when the soil content in sand and gravel is high, the water reducing rate of polycarboxylate superplasticizer will be greatly reduced, the fluidity of concrete will drop sharply, the slump loss will be rapid, and the transportable time will be greatly shortened, so it is difficult to guarantee Transportation, pumping and construction requirements for concrete

Secondly, when there is a lot of soil in the aggregate sandstone, it will also reduce the bond strength between the cement and the aggregate, which will adversely affect the properties of concrete such as compression resistance, shrinkage, flexural resistance, and wear resistance.

Patent CN102358763A proposes a method for preparing an admixture for suppressing the side effects of clay. This admixture reduces the adsorption of clay to polycarboxylate superplasticizer through competitive adsorption, and has a certain inhibitory effect on clay, but its interaction with clay The mode of action is electrostatic adsorption. This kind of physical adsorption by electrostatic action has its limitations in universality and stability. The adsorption capacity is weak, and the adsorption on the soil is not firm, so the inhibitory performance on clay is not strong. limited effect

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