Amphoteric early-strength polycarboxylate superplasticizer mother solution for C30 concrete

Abstract

The invention provides an amphoteric early-strength polycarboxylate superplasticizer mother solution for C30 concrete. The polycarboxylate superplasticizer mother solution comprises, by weight, 330-339 parts of polyether macromonomers with the molecular weight being 4000, 22-25 parts of acrylic acid, 11-18 parts of quaternary ammonium and quaternary phosphorus cation micromonomers, 2-5 parts of 27.5% industrial-grade hydrogen peroxide, 3-6 parts of unsaturated sulfonate, 2-4 parts of phosphate functional monomers, 4-8 parts of amide micromonomers, 0.4-1 part of reducing agent, 6-12 parts of caustic soda liquid, 0.4-0.8 part of chain transfer agent and the balance water, wherein the total weight of the components is 1000 parts. The mass fraction of the polycarboxylate superplasticizer mother solution is 40%, and the acid-ether ratio of the mother solution is controlled to be 3.7-4.1. Compared with relatively-low-molecular-weight polyether macromonomers such as polyether macromonomers with the molecular weight being 2400 used by existing common polycarboxylate superplasticizers, the polyether macromonomers with the molecular weight being 4000 and used by the polycarboxylate superplasticizer mother solution have cost advantages and can meet the production requirements of low cost and high effectiveness.

Description

technical field [0001] The invention relates to the technical field of building materials and concrete admixtures, in particular to a mother liquor of an amphoteric early-strength polycarboxylate superplasticizer for C30 concrete. Background technique [0002] With the continuous development of the concrete industry, the water reducing agents used to improve the workability of concrete are becoming more and more diverse. The water reducing agents currently on the market can be divided into lignin-based, naphthalene-based, and amine-based according to their chemical composition. Sulfonates, polycarboxylates, resins, etc. Compared with other types of water reducers, polycarboxylate water reducers have superior performance, so they are more widely used. [0003] Polycarboxylate superplasticizer is an anionic surfactant containing carboxyl copolymer in its molecular structure. When used, the water reducing rate can reach about 25%-40%, and it has excellent slump retention effec...

AI Technical Summary

Problems solved by technology

Normally, the cement particles will be positively charged, so the water reducer molecules should be made anionic to interact with it, and the sand with high mud content means that the clay content is high, and the clay particles are negatively charged, so the single anion Type water reducing agent can not play a good water reducing effect

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