Efficient water reducing agent and preparation method thereof

Abstract

The invention provides an efficient water reducing agent and a preparation method thereof. The efficient water reducing agent is prepared from the following raw materials in parts by weight: 40-60 parts of ethylene oxide, 40-60 parts of epoxypropane, 5-10 parts of methallyl alcohol, 5-10 parts of prenyl alcohol, 20-35 parts of acrylic acid, 20-35 parts of methyl acrylate, 20-35 parts of butyl acrylate, 20-35 parts of methyl methacrylate, 2-4 parts of mercaptoethanol, 2-4 parts of formosul and 2-4 parts of a vitamin C. The efficient water reducing agent is simple in technological process, and has the advantages of high water resistance, small concrete pump conveying resistance, no bubbles, strong anti-freeze capacity, convenient construction and the like. A polyether I-type intermediate prepared in a first step and a polyether II-type intermediate prepared in a second step are stored in a feeding tank for guaranteeing a form of a semi-finished product which is convenient for follow-up working section treatment. The mercaptoethanol, the formosul and the vitamin C in auxiliary material water solution are used as reaction raw materials, the modified effect is achieved to a product of the polycarboxylic acid water reducing agent, and the water reducing effect and the collapse protecting effect of the water reducing agent are improved.

Description

technical field [0001] The invention relates to the technical field of preparation of concrete admixtures, in particular to a high-efficiency water reducer and a preparation method thereof. Background technique [0002] Water reducer is a kind of cement dispersant in the preparation and construction of cement concrete. Widely used in highways, bridges, dams, tunnels, high-rise buildings and other projects. However, most of the polycarboxylate superplasticizers currently on the market have some defects. For example, as the requirements for the durability and strength of concrete buildings in engineering construction and application are getting higher and higher, it is required to develop a low-volume, A high-quality polycarboxylate water-reducer with high water-reducing rate, small change in slump over time, low energy consumption, safety and environmental protection, for this reason, people try to improve the preparation method of polycarboxylate water-reducer. Contents o...

AI Technical Summary

Problems solved by technology

However, most of the polycarboxylate superplasticizers currently on the market have some defects. For example, as the requirements for the durability and strength of concrete buildings in engineering construction and application are getting higher and higher, it is required to develop a low-volume, A high-quality polycarboxylate water-reducer with high water-reducing rate, small change in slump over time, low energy consumption, safety and environmental protection, for this reason, people try to improve the preparation method of polycarboxylate water-reducer