A high-efficiency cement-based permeable crystalline waterproof coating and its preparation method and construction method

Abstract

The invention relates to an efficient cementitious capillary crystalline waterproofing coating. The coating is prepared from the following raw materials in parts by weight: 40-70% of silicate cement, 12-23% of high-activity master batch, 20-30% of quartz sand, 0.3-1.2% of a catalyst and 1.2-3% of a diffusion agent. According to the invention, active chemical materials are doped into silicate cement and quartz sand which are adopted as base materials so as to prepare a powder material; then the powder material can be mixed with water to prepare slurry which can be coated or sprayed onto the surface of cement concrete, or the powder material can be coated or pressed onto the surface of the cement concrete which is not completely solidified so that the anti-penetrability performance of the concrete is increased; the function mechanism is as follows: the active chemical materials in the waterproofing coating permeate into the inside of the concrete and react with various oxides in the concrete, then water-insoluble crystallines are formed in the concrete and capillary channels are blocked, so that the concrete is compact and fireproof.

Description

technical field [0001] The invention relates to a waterproof coating, in particular to a high-efficiency cement-based permeable crystalline waterproof coating and a preparation method and a construction method thereof, belonging to the field of construction engineering waterproof coatings. Background technique [0002] In industrial and civil reinforced concrete construction projects, due to the poor impermeability and waterproof performance of concrete materials, cracks are prone to occur on the surface of buildings and water leakage occurs. The method of laying waterproof membranes or painting paint on the concrete surface not only has high cost and complicated construction methods, but also has problems such as poor durability and environmental pollution. [0003] Cement-based permeable crystalline waterproof coating is a new type of rigid waterproof material in China. It has the advantages of energy saving, environmental protection, harmless to human health, simple produ...

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Problems solved by technology

The method of laying waterproof membranes or painting on the concrete surface is not only costly and complicated, but also has problems such as poor durability and environmental pollution.

[0003] Cement-based permeable crystalline waterproof coating is a new type of rigid waterproof material in China. It has the advantages of energy saving, environmental protection, harmless to human health, simple production process, low cost, simple construction process, long-term waterproof effect, and wide application prospects. etc., but the market is flooded with counterfeit and shoddy cement-based osmotic crystalline waterproof coatings. Most of the commonly used cement-based waterproof materials are surface-sealed waterproofing agents. The waterproof effect only acts on the surface and cannot penetrate into the structure automatically and deeply. The pressure is low; the waterproof effect is not durable, and as time goes by, a continuous degradation process occurs. Once the waterproof layer is damaged, the waterproof ability will be lost, and there is no secondary impermeability; it is easy to cause alkali-aggregate reaction in concrete ( AAR) and other weaknesses

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