High performance-price-ratio polycarboxylic acid water reducing agent

Abstract

The invention belongs to the technical field of cement concrete admixtures, and particularly relates to a high performance-price-ratio polycarboxylic acid water reducing agent preparation method. According to the present invention, a basic constructing unit is synthesized by using methylallyl polyoxyethylene ether, acrylic acid and a comonomer as polymerization monomers under the action of a reducing agent, and an auxiliary constructing unit is added to the basic constructing unit to obtain the high performance-price-ratio polycarboxylic acid water reducing agent; the technology is guided by the concepts of molecular chemistry and supramolecular chemistry, establishes the basic constructing unit and the auxiliary constructing unit for the supramolecular assembly of GPCA products, and optimizes the supramolecular assembly; the test and application results prove that the related performances of the assembled high performance-price-ratio polycarboxylic acid water reducing agent meet the first grade standard requirements of the corresponding product, the consumption of the macromonomer in the product is reduced by 10-15% compared with the similar product, the coat of the initiation system can be reduced by 30-40%, the ultimate cost of the product is reduced by 8-15%, the adaptability is improved, and the product has strong market competitiveness.

Description

technical field [0001] The invention belongs to the technical field of cement concrete admixtures, and in particular relates to a preparation method of a cost-effective polycarboxylate water reducer. Background technique [0002] Concrete admixtures have become one of the main components of cement concrete materials, and water reducers are the most important components. Among the four basic properties of concrete durability, workability, strength and economy, admixtures are one of their indispensable and important components. With the extensive application of cement concrete materials, the demand for corresponding raw materials has increased. However, at present, not only the quantity of concrete raw materials is limited, but also the quality of raw materials is more prominent. There are also many problems, especially the insufficient supply of sand and gravel materials and excessive mud content. Seriously affect the workability of concrete preparation and the strength and ...

AI Technical Summary

Problems solved by technology

With the extensive application of cement concrete materials, the demand for corresponding raw materials has increased. However, at present, not only the quantity of concrete raw materials is limited, but also the quality of raw materials is more prominent. There are also many problems, especially the insufficient supply of sand and gravel materials and excessive mud content. Seriously affect the workability of concrete preparation and the strength and durability of products

The most prominent performance deterioration of concrete is the reduction of workability. The current basic solutions are: first, increase the amount of admixtures, and second, purify sand and gravel. These measures will cause corresponding cost increases, which are unacceptable to relevant enterprises.

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