Concrete tackifying and water retaining agent and preparation method and application thereof

Abstract

The invention relates to a concrete tackifying and water retaining agent. The concrete tackifying and water retaining agent is formed by polymerizing methyl ene butyl polyoxyethylene polyoxypropylene, unsaturated monocarboxylic acid or / and derivatives of unsaturated monocarboxylic acid, unsaturated alkenyl sulfonic acid or / and sodium salt of unsaturated alkenyl sulfonic acid and an unsaturated alkenyl organosilicone cross-linking agent. The invention further provides a preparation method of the concrete tackifying and water retaining agent. The concrete tackifying and water retaining agent can be applied to concrete with the grade of C30 or below, the tackifying and water retaining effect is excellent, the concrete fluidity loss is small, and high engineering application value is achieved.

Description

technical field [0001] The invention relates to the field of preparation of concrete admixtures, in particular to a concrete viscosity-increasing and water-retaining agent. Background technique [0002] Green high-performance concrete and reinforced concrete are the most important structural engineering materials for buildings in the 21st century. Due to the rapid development of domestic urbanization in recent years, a large amount of concrete raw materials have been consumed, and the corresponding supply of concrete raw materials has been changed. The uniform stability of concrete is the difficulty and focus of the preparation of green high-performance concrete today. In fact, there is a shortage of natural sand and gravel resources, and there is no sand to be mined. The trend of machine-made sand and gravel to replace natural sand and gravel to prepare high-performance concrete is obvious; limestone machine-made sand concrete, C30 and below low-strength grade concrete all ...

AI Technical Summary

Problems solved by technology

In fact, there is a shortage of natural sand and gravel resources, and there is no sand to be mined. The trend of machine-made sand and gravel to replace natural sand and gravel to prepare high-performance concrete is obvious; limestone machine-made sand concrete, C30 and below low-strength grade concrete all have poor concrete cohesion and concrete flow. The problem of quick loss of properties; clay mineral admixtures are easy to absorb water and cause volume expansion, and at the same time accelerate the loss of concrete fluidity or slump. The common method is to increase the amount of water reducer and increase the water-cement ratio, which will also lead to The working stability of the mixture and the poor mechanical properties of hardened concrete

Concrete of C30 and below is prone to problems such as insufficient slurry, segregation and bleeding of concrete after pouring, settlement shrinkage and cracking of hardened concrete, more porous structure of surface concrete, looseness, and greatly reduced strength, etc.

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