Polycarboxylate water reducer derived from environmentally friendly and odorless raw materials and its preparation method and application

Abstract

This application relates to a polycarboxylate water reducer derived from environmentally friendly and odorless raw materials, which is made of the following raw materials in parts by weight: 100 parts of unsaturated polyether, 8 to 24 parts of acrylic acid, 1 to 6 Parts of sodium methacrylate, 0.6-3.0 parts of ammonium persulfate, 1.0-2.0 parts of hydrogen peroxide, 0.6-1.0 parts of L-ascorbic acid, 0.2-0.7 parts of E51, 0.3-0.9 parts of sodium formaldehyde sulfoxylate, 1.5-7.5 parts sodium phosphite and 123 to 294 parts of water, the number average molecular weight of the unsaturated polyether is 2000 to 3000, and it is one or more of the following: methallyl polyoxyethylene ether, methyl Enyl butyl polyoxyethylene ether or vinyl glycol ether polyoxyethylene ether. The present application also relates to the preparation method and use method of the polycarboxylate water reducer and its application in construction engineering. The polycarboxylate water reducer of the present application has a simple preparation process, is convenient to operate, has good initial fluidity and good slump retention, and has remarkable economic, social and environmental benefits.

Description

technical field [0001] This application relates to the technical field of building materials, in particular to a polycarboxylate water reducer derived from environmentally friendly and odorless raw materials, a preparation method of the polycarboxylate water reducer derived from environmentally friendly The use method of the polycarboxylate water reducer and the application of the polycarboxylate water reducer derived from environmentally friendly and odorless raw materials in construction projects that require high concrete initial fluidity and slump retention effect. Background technique [0002] Due to its unique comb structure, the polycarboxylate superplasticizer has multiple charged groups on the main chain and hydrophilic active groups on the side chains, thus playing the role of dispersing cement particles. It has the advantages of low dosage, high water reducing rate, and small loss of slump over time. It has become the most widely used concrete water reducing agent...

AI Technical Summary

Problems solved by technology

In recent years, with the country's emphasis on green environmental protection, and the needs of various production companies for energy saving and emission reduction, shortening the production cycle, and improving efficiency, the synthesis of polyacid water reducers by traditional high-temperature reactions has also gradually developed a normal temperature synthesis method, but The conventional small materials used, such as mercaptopropionic acid, mercaptoacetic acid, mercaptoethanol, etc., have a strong sulfide smell, especially in the hot summer, the smell is even more unbearable

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