A kind of foam control agent and the air-entraining water-reducing compound agent thereof, concrete

Abstract

The invention provides a foam control agent and an air-entraining water reducing compounding agent and concrete prepared thereof. The foam control agent is mainly formed by compounding the following components by weight: 5-40% of an alkynol wetting agent E20, 40-70% of an alkynol wetting agent E40, 20-50% of an alkynol wetting agent E65, and the balance other accessories. The foam control agent has double technical effects of air entraining and foam control, can control the foam density and the foam size of a system, makes foams more uniform, eliminates big harmful foams, and makes the cement strength, stability and other properties improved.

Description

technical field [0001] The invention relates to the technical field of concrete additives, in particular to a foam control agent and an air-entraining water-reducing compound agent and concrete made thereof. Background technique [0002] The development and application of concrete superplasticizers has a long history. So far, high-efficiency superplasticizers have become an indispensable part of high-performance concrete. According to the action mechanism of the water reducer on cement, the polycarboxylate water reducer has a molecular chain with a comb structure synthesized by the molecular design method, which solves the common slump loss over time of the traditional water reducer from the molecular structure. Large, relatively low water reduction rate, and problems such as harm to the environment. Therefore, polycarboxylate superplasticizers will surely become an important direction for the development of green concrete superplasticizers in the 21st century. The current...

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Problems solved by technology

The current product has disadvantages: the effect of the compound components of polycarboxylate superplasticizer is not superimposed, but inhibits each other, reducing the strength of concrete

Although air-entraining agents have been produced and applied in my country for decades, many construction and design units still have misunderstandings about air-entraining agents, and the performance of many air-entraining agents still has a certain gap compared with similar foreign products. There are few varieties of air-entraining agents produced, and in addition, we do not have much research on the application technology of air-entraining agents. The common concrete air-entraining agents currently on the market in my country mainly include rosin soap and rosin thermal polymers, lauryl sulfates, and triterpene saponins. class etc.

Due to the poor solubility of rosin products, the poor bubble structure and foam stability, the compounding performance of lauryl sulfate and triterpene saponins with other additives is poor, especially the above three types of products are all compatible with the new generation of high-efficiency Water reducer - polycarboxylate water reducer is difficult to be compatible and other reasons, the application of engineering is limited

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