Cement-based self-healing capillary crystalline material and preparation method thereof

Abstract

The invention relates to the technical field of waterproof materials, and discloses a cement-based self-healing capillary crystalline material. Comprising the following raw materials in parts by weight: 50-70 parts of Portland cement, 60-80 parts of quartz sand, 60-80 parts of fly ash, 10-12 parts of a water reducing agent, 5-7 parts of sodium metasilicate pentahydrate, 6-8 parts of calcium chloride, 10-12 parts of hydroxypropyl methyl cellulose, 5-7 parts of silicone oil, 8-10 parts of tartaric acid, 6-8 parts of polyvinyl alcohol fibers, 12-16 parts of gypsum powder, 12-16 parts of vesuvianite powder, 5-7 parts of a curing agent and 10-12 parts of perlite. According to the cement-based self-healing capillary crystalline material and the preparation method thereof, an active chemical substance is formed by chemical substances such as sodium metasilicate pentahydrate, calcium chloride, hydroxypropyl methyl cellulose, silicone oil and tartaric acid, and can react with a concrete hydration product in capillary pores in the process of stirring cement to form concrete; and needle-shaped or fiber-shaped crystals are generated, capillary channels in the concrete can be blocked, automatic healing of cracks in the concrete is further achieved, and the compactness of the concrete is enhanced.

Description

technical field [0001] The invention relates to the technical field of waterproof materials, in particular to a cement-based self-healing permeable crystalline material and a preparation method thereof. Background technique [0002] Cement is a powdery hydraulic inorganic gelling material. It can be mixed with water to form a slurry. It can be hardened in air or in water, and can firmly bond materials such as sand and stone together. The mixture of early lime and volcanic ash and modern Lime pozzolanic cement is very similar. Concrete made of crushed stones is cemented with it. After hardening, it not only has high strength, but also can resist the erosion of fresh water or salt water. For a long time, it has been widely used as an important cementing material. Civil engineering, water conservancy and national defense projects. [0003] For example, Chinese patent CN 104230290 B discloses a heat-storing black body cement and its preparation method. The black body cement is ...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a cement-based self-healing permeable crystalline material and its preparation method, which has the advantages of good compactness, etc., and solves the problem that the reduction of compactness in the process of concrete molding further affects the quality of concrete molding