Anti-crack micro-expansive concrete for building and preparation method of anti-crack micro-expansive concrete

Abstract

The invention relates to the technical field of concrete, in particular to anti-crack micro-expansive concrete for buildings and a preparation method of the anti-crack micro-expansive concrete. The anti-crack micro-expansive concrete for the building is prepared from the following raw materials in parts by mass: 780 to 900 parts of cement, 250 to 280 parts of fly ash, 700 to 730 parts of lightweight aggregate, 100 to 200 parts of glass fiber, 10 to 20 parts of amino-terminated polyamidoamine, 10 to 20 parts of magnesium oxide, 10 to 50 parts of hydrotalcite, 10 to 20 parts of graphene oxide and 10 to 50 parts of thionyl chloride. The obtained concrete is applied to the fields of water conservancy projects, underground buildings and the like, water leakage can be effectively prevented, normal use and safety of the structure are guaranteed, the anti-cracking performance and the anti-seepage performance are excellent, meanwhile, the preparation method is simple, and the concrete is suitable for large-scale application and popularization.

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