Compound type cement-based permeable crystallization type waterproof material

Abstract

The invention discloses a compound type cement-based permeable crystallization type waterproof material. The material comprises the following raw materials in parts by weight: 320-570 parts of Portland cement, 240-480 parts of quartz sand, 60-250 parts of heavy calcium, 5-150 parts of silica fume, 2-125 parts of redispersible latex powder, 0.5-50 parts of a surfactant, 0.5-30 parts of a catalyst,0.05-2 parts of cellulose ether. After the material and water are acted, active chemicals in the waterproof material employ water as a carrier and penetrate into internal porosities of cement concretedue to high permeability, in order to promote generation of hydration reaction of unhydrated cement particles, generate a lot of needle-like crystal, and block closed capillary channels, and the cement concrete has excellent waterproof impervious impermeability function; when new fine cracks are generated in concrete, under a wet condition or water infiltrates, active chemical substances are reactivated, new hydration reactions are generated by catalysis, and new needle-like crystals are generated in slits in order to fill and block fine cracks with excellent self-repairing function.

Description

technical field [0001] The invention relates to the field of building waterproof materials, in particular to a composite cement-based permeable crystalline waterproof material. Background technique [0002] Constructions such as subways, tunnels, culverts, reservoirs, dams, docks, ports, swimming pools, basements, and irrigation canals use cement concrete as construction materials, usually due to water and water-soluble carbonates, chloride ions, sulfur dioxide and sulfuric acid Corrosive substances such as salt infiltrate from structural defects (such as cracks, cracks and micropores) to corrode the steel bars inside the concrete, resulting in the degradation of the performance of the reinforced steel bars inside the concrete, which seriously affects the service life of the construction project. Therefore, it is necessary to use waterproof materials to waterproof the concrete. [0003] At present, there are many waterproof materials developed and used. Generally speaking, ...

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Problems solved by technology

[0004] Although traditional flexible waterproof materials such as polymer coils and coatings have the advantages of flexibility and convenient construction, they have weak adhesion to the base concrete, especially when the base is wet or seepage, and cannot be used as a backing. Waterproofing of water surfaces and wet substrates

On the other hand, since the flexible waterproof material is a high polymer, it is easy to age, decompose, and degrade, so its service life is shorter than that of rigid waterproof materials.

At the same time, most flexible waterproof materials are harmful to the environment and cannot be used as green building materials

[0005] Rigid cement-based waterproof materials have incomparable performance with flexible materials, and are widely used in special fields and occasions. However, concrete structures will be damaged under stress or other factors, resulting in microcracks. Although these damages are invisible, if not If it is repaired in time, these micro-cracks will further develop, and large cracks will appear. Due to the infiltration of water, the steel bars will be corroded, which will reduce the earthquake resistance and service life of the concrete structure.

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