Early-strength polycarboxylate superplasticizer having slump-loss prevention function and preparation method thereof

Abstract

The invention discloses an early-strength polycarboxylate superplasticizer having a slump-loss prevention function and a preparation method of the polycarboxylate superplasticizer. The polycarboxylate superplasticizer is prepared through the following steps: (I) copolymerizing 5-12% of a monomer a, 73-89% of a modified low-foam early-strength polyether monomer b with the molecular weight (M) in a range of 2000-5000, and 6-15% of a monomer c in an aqueous solution at 50-70 DEG C to obtain a copolymerization reactant, wherein the total amount of the monomer a, the monomer b, and the monomer c is 100% by weight; and (II) adding a pH value conditioning agent into the copolymer for a neutralization reaction, wherein the pH value of the copolymer is adjusted to 6.8-7.2. According to the invention, the early-strength polycarboxylate superplasticizer having a slump-loss prevention function enables the fluidity of cement paste of concrete to be well kept. The concrete is low in air content and short in setting time, and the early-strength of the concrete is significantly enhanced. The polycarboxylate superplasticizer enables the concrete to have certain slump maintenance, and is particularly suitable for production of a prefabricated component of a pile tube or duct piece.

Description

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AI Technical Summary

Benefits of technology

This patented new type of chemical called PolyCarboxymerdia Water Reductor was developed earlier than previous types such as Calomelon Superplasticizer. It consists mainly of two main components – one being a hydrogel copolymers made from different starting compounds like Acrylate Monozygopolysilane(AMS). One component acts as a reagent for improving rapid hardening properties while another component helps maintain strong structures during curing without losing their shape after they set up. Overall this innovative technology provides technical benefits over existing methods used alone.

Problems solved by technology

The present invention relates to improved polymers called Poly Carbon Aggregator (PCAs). These compositions include specific types of chemical compounds like Acrylate Super Plumbers (SPAN) and CPEs (Carbon Paper Preparations)。 PCAS consist primarily of carbons reinforced together during preparative stages of making pipes from wet castings. They help increase tensile force while maintaining good quality standards. Additionally they provide long term durable structures without requiring frequent replacements due to corrosion caused by chlorides. Water soluble salts containing sulfonic ammonium salt were developed earlier than before. By adding these salts, the properties of the resulting structure could be enhanced compared to traditional methods involving longer curing times.

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