Shrinkage reducing and curing agent for concrete

Abstract

The invention relates to a shrinkage reducing and curing agent for concrete, which has double functions of a shrinkage reducing agent for concrete and a curing agent for concrete and belongs to a building material. The shrinkage reducing and curing agent for concrete comprises a multifunctional high molecular polymer, and is a high-efficiency shrinkage and reducing curing agent comprising a water-soluble organic high-molecular film-forming agent, an inorganic densification agent, a shrinkage reducing agent, and the like. The shrinkage reducing and curing agent is directly brushed on the concrete surface layer to prevent water evaporation, and is capable of permeating through the capillary pores of the concrete to block the channel from which water in the capillary pores evaporates outwards. Meanwhile, the shrinkage reducing and curing agent can reduce the surface tension of water in the capillary pores so as to reduce the drying shrinkage of the concrete, thereby playing a good role in reducing shrinkage, conserving water and curing.

Description

technical field [0001] The invention relates to a concrete additive, in particular to a concrete shrinkage-reducing curing agent. Background technique [0002] After the concrete is poured, it must be cured during the initial setting process, that is, to maintain the necessary humidity so that it has enough water to ensure the complete hydration reaction. Our country started relatively late in the development and application of concrete curing agents, and it was only in the past ten years that chemical curing methods were adopted in some concrete projects. There are the following types of main curing agents that are practical: (1) paraffin wax emulsion; (2) silicate aqueous solution based on water glass; (3) solvent-based resin solution. Their maintenance mechanism is to form a water-resistant layer on the surface of the concrete to prevent the volatilization of mixing water, so as to realize the self-curing of the concrete. Although curing agents have been widely used in ...

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Problems solved by technology

However, the price of shrinkage reducing agent is high at present, and the incorporation into concrete has caused compatibility problems between water reducing agent and shrinkage reducing agent, which directly affects its domestic promotion and application.

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