Anti-mud agent for concrete

Abstract

The invention discloses an anti-mud agent for concrete. The anti-mud agent is prepared by the following steps: 1) preparing a mixed aqueous solution of acrylamide and ethanol, adding 1,2-dibromoethane and epoxypropane, carrying out stirring, adding sodium methacrylate and an aqueous solution of tetramethylethylenediamine and dimethylamine, carrying out stirring, adding dimethyl diallyl ammonium chloride, ammonium persulfate, glucose and ascorbic acid, and performing water-bath constant-temperature stirring to obtain a mixture A; 2) adding an aqueous solution of methacryloyloxyethyl trimethyl ammonium chloride into the mixture A, conducting stirring, adding an aqueous solution of sodium sulfite and potassium persulfate, and carrying out constant-temperature water bath treatment; and 3) adding allyl alcohol polyoxyethylene ether and cysteine, conducting stirring, carrying out air cooling, adding sodium tripolyphosphate, and performing stirring to obtain the anti-mud agent for the concrete. The anti-mud agent prepared by the method provided by the invention has good dispersion effect and dispersion retention effect on cement, is high in water-reducing rate and free of obvious deterioration in compressive strength, and has obvious advantages compared with the existing anti-mud agents.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a concrete anti-mud agent. Background technique [0002] The volume of aggregate in concrete accounts for about 70% of the volume of concrete. The quality of aggregate has a very important impact on the performance of concrete. Clay content is one of the many performance indicators of aggregate. Micro-substances such as clay and stone powder are common mud components. They may cause increased water demand or weaken concrete performance or be more easily weathered, hinder the full development of cement-aggregate bonding, prevent the normal hydration of cement or interact with the ingredients in cement. Chemical reaction, most aggregates contain one or several impurities, among which clay and stone powder are the most common, they work in various forms in concrete, and often have adverse effects on the working performance of concrete. To solve the problem of the adverse...

AI Technical Summary

Problems solved by technology

To solve the problem of adverse effects of mud content on concrete, the general method is to replace materials or greatly increase the amount of admixtures such as water reducing agents, but this brings about a corresponding increase in workload and cost.

Images