Concrete micro-foam air entraining agent

The invention belongs to the technical field of engineering material preparation, and particularly discloses a concrete micro-foam air entraining agent which is prepared from the following components in parts by weight: 8-10 parts of fatty alcohol-polyoxyethylene ether sodium sulfate, 10-12 parts of alpha-sodium olefin sulfonate, 8-10 parts of maltodextrin, 10-12 parts of carboxymethyl starch and 60 parts of water. The invention aims to solve the technical problems that bubbles of high-fluidity concrete prepared from a polycarboxylate superplasticizer are easy to migrate and float and are gathered and communicated to form inferior large bubbles, and the fracture loss is serious. The concrete foam stabilizer is compounded in the concrete air entraining agent prepared by the research of the project, so that the bubble strength is improved, and the breakage rate is reduced. Meanwhile, the foam stabilizer can improve the viscoplasticity of the concrete, prevent the bubbles from floating and migrating, prevent the