Concrete aqueous demolding agent and preparation method thereof

Abstract

The invention belongs to the technical field of concrete, and particularly relates to a concrete aqueous demolding agent and a preparation method thereof. The concrete aqueous demolding agent is prepared from the following raw materials and components of 0.2-2.5% of a composite emulsifying agent, 8.5-14% of engine oil and 85-91% of water, wherein the composite emulsifying agent is compounded from a nonionic surfactant, a dispersing agent, a film forming agent, a corrosion inhibitor, polyether-modified siloxane, a preservative and an emulsion stabilizing agent. The concrete aqueous demolding agent disclosed by the invention is good in stability, and good in adhesion properties on various steel molds and wooden molds; and when the concrete aqueous demolding agent is used as a demolding agent for building a precast component, the surface of the component is free from greasy dirt residues, the surface is smooth, and few concrete residues exist on templates. The concrete aqueous unmolding agent disclosed by the invention is prepared by emulsifying the engine oil by the composite emulsifying agent; the composite emulsifying agent is small in addition quantity, simple in the ingredients, free from environment pollution and high in emulsifying force; and the engine oil does not need to be heated at high temperature, and the engine oil can be emulsified under a low-temperature condition.

Description

technical field [0001] The invention belongs to the technical field of concrete, and in particular relates to a concrete water-based release agent and a preparation method thereof. Background technique [0002] Concrete release agent is a kind of coating or spraying on the inner surface of the formwork, which can produce a layer of isolation film to lubricate and isolate, and can effectively reduce the adhesion between the concrete and the formwork, so that the concrete can be smoothly separated from the formwork when the formwork is removed. , the substance or material that keeps the shape of concrete intact and clean. As an essential concrete admixture, a good release agent can effectively ensure that the edges and corners of concrete components are neat and undamaged, and the surface color is uniform, smooth and even. Moreover, the formwork is easy to clean after demoulding, and can improve labor productivity, etc., so it plays a very important role in the development an...

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Problems solved by technology

[0003] At present, there are many kinds of concrete release agents at home and abroad, which can be divided into: soap, pure oil, water quality, solvent, polymer, paint and emulsified oil according to chemical composition; soap release effect is general, and soap The aqueous solution is an alkaline solution, which affects the surface quality of the concrete after it is formed; using pure oil such as motor oil or waste motor oil as a release material is easier to remove from the mold, but it takes a long time to dry after coating, and it is easy to contaminate construction operators Clothes and polluted steel bars, and there are often oil spots on the surface of the structure after the concrete is hardened and formwork removed, which affects the appearance of the concrete surface and has a very adverse effect on the later decoration of the concrete surface; water quality can not be applied multiple times each time It is not available for construction in the winter rainy season; solvents are expensive and pollute; polymers and paints are expensive and difficult to clean; the existing emulsified oil release agent has a high emulsification temperature, and the amount of emulsifier used is large, and The produced emulsified oil has poor stability, is prone to stratification, and is not suitable for long-term storage. After the film is formed, the template has poor resistance to rain erosion. On the other hand, some emulsifiers used in the compound will pollute the environment and are not conducive to large-scale use

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