Method for enhancing workability of concrete

Abstract

The invention provides a method for enhancing workability of concrete. A technical scheme of the invention is that a workability improving agent with hydrophilic colloid as a main component is added into the concrete to enhance workability of the concrete. Adding the workability improving agent with hydrophilic colloid as the main component into the concrete can reduce sensitivity of water reducer to aggregate, improve concrete holding phenomenon during strong concrete pumping, reduce concrete pumping pressure, so as to endow better construction performance on the concrete.

Description

technical field [0001] The invention relates to a method for improving the comprehensive performance of concrete, in particular to a method for improving the workability of concrete. Background technique [0002] Water reducer has become an indispensable fifth component in concrete, and more and more attention has been paid to it. Polycarboxylate superplasticizer is a kind of superplasticizer with better comprehensive performance. Its high water reducing rate and good slump retention are beyond the reach of previous naphthalene or aliphatic water reducers. . In China, polycarboxylate superplasticizers have developed rapidly due to their excellent performance, but polycarboxylate superplasticizers also have many shortcomings, because most of the performance of polycarboxylate superplasticizers mainly depends on the performance of the masterbatch Bad performance makes the compounding of polycarboxylate superplasticizer easier, but when encountering problems, it becomes impos...

AI Technical Summary

Problems solved by technology

In China, polycarboxylate superplasticizers have developed rapidly due to their excellent performance, but polycarboxylate superplasticizers also have many shortcomings, because most of the performance of polycarboxylate superplasticizers mainly depends on the performance of the masterbatch Bad to reflect, making the compounding of polycarboxylate superplasticizer become simple, but when encountering problems, it becomes impossible to start

Especially because the water-reducing rate of polycarboxylate superplasticizer is too high, when the concrete mixing station uses electronic scales to measure the amount of polycarboxylate superplasticizer, if the amount of polycarboxylate superplasticizer is slightly excessive, the concrete will have problems such as bleeding and exposed stones. , the workability becomes poor; polycarboxylate superplasticizers are sensitive to sand and gravel, so that even a small change in the material will greatly affect the amount of polycarboxylate superplasticizer; Bottom phenomenon, pumping difficulty, etc.

[0003] Chinese Patent Publication No. CN101293946 patent provides a polycarboxylate superplasticizer mother liquor single problem, which uses polyethylene glycol monomethyl ether methacrylate and methacrylic acid aqueous solution as raw materials, and controls the temperature of the reaction system and the pH value of the solution. Prepared a kind of air-entraining controllable polycarboxylate water reducer

The technologies provided in the above patents have a certain effect on improving the workability of concrete, but the production process conditions of these technical solutions are complicated, and the cost of preparing raw materials is high