A kind of combined anti-mud agent, anti-mud pumping agent and preparation method thereof based on polycarboxylate pumping agent

Abstract

The invention provides a composite anti-mud agent based on a polycarboxylate-type pumping agent, an anti-mud pumping agent and a preparation method of the anti-mud pumping agent. The anti-mud pumping agent comprises a water reducing component which is namely a liquid polycarboxylate superplasticizer with solid content of 40%, a retarder component which is namely a conventional retarder, an entraining component which is namely an anionic surfactant synthesizing entraining agent and a composite anti-mud agent which is namely a mixture of calcium nitrate, polyvinyl alcohol, beta dextrin and diallyl dimethyl ammonium chloride. The preparation method of the anti-mud pumping agent comprises the following steps: firstly adding raw materials of the composite anti-mud agent into water, and preparing a composite anti-mud agent solution; adding the composite anti-mud agent solution into a mixture of the polycarboxylate superplasticizer, the entraining agent, the retarder and water, and uniformly stirring. The anti-mud pumping agent has the advantages that influence of content of mud in sand and stones on flowability of concrete can be obviously reduced without increasing the cost, the time loss in collapsed slump is reduced, and other properties such as strength of the concrete are not influenced.

Description

technical field [0001] The invention relates to the technical field of admixtures for concrete, in particular to a combined anti-mud agent based on a polycarboxylate pumping agent, an anti-mud pumping agent and a preparation method thereof. Background technique [0002] As a new generation of high-performance superplasticizer, polycarboxylate superplasticizer has the advantages of low dosage, high water reducing rate, small shrinkage, and greatly improves the early and late strength of concrete. However, it is sensitive to mud content, which hinders the popularization of polycarboxylate superplasticizer. Moreover, with the mining of a large amount of sand and gravel materials, serious environmental problems have been caused. Therefore, the government has issued special laws to restrict the mining of sand and gravel materials, which has led to the deterioration of the quality of sand and gravel, and the problem of mud content has become more and more serious. How to solve th...

AI Technical Summary

Problems solved by technology

It solves the technical problem that the poor mud resistance of the existing pumping agent causes the sand and stone mud content to have a great influence on the strength and other properties of the concrete

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