Two-component cement-based polymer rigid waterproof mortar

Abstract

The invention discloses two-component cement-based polymer rigid waterproof mortar which comprises liquid components and powder components, wherein the liquid components comprise butadiene-styrene copolymer emulsion, styrene-acrylate copolymer emulsion, coalescing agents, defoamers and water, and the powder components comprise Portland cement, filler, water reducers, water-retaining agents and water repellents. The two-component cement-based polymer rigid waterproof mortar not only has excellent water-proof and impermeable performances so as to effectively solve the waterproof problem of water-attaining surfaces or water-retaining surfaces of concrete structures of underground engineering, interior decoration and the like, but also has high mechanical strength and is capable of resisting external mechanical impact. Besides, the two-component cement-based polymer rigid waterproof mortar has good cementing bond with concrete bases so that proneness to hollowing and shedding is avoided, and the newly stirred mortar low in viscosity facilitates thin coating of roll coating, brush coating or the like, so that construction efficiency is greatly improved, and use space and cost are saved.

Description

technical field [0001] The invention relates to a building waterproof material, in particular to a two-component cement-based polymer rigid waterproof mortar widely used in underground projects and kitchen and bathroom decoration projects. Background technique [0002] The application of waterproof materials in construction projects has a long history. With the deepening of the understanding between the waterproof performance and durability of buildings, people pay more and more attention to the waterproof measures of construction projects. However, existing waterproof materials are more limited to flexible materials such as "coiled materials and coatings". For example, coiled materials, pastes, and oil products are used in engineering. High density will also prevent air from entering and exiting in cement concrete; although high-density polymer membranes can effectively solve the problem of water leakage, they also have the disadvantage of sealing the concrete breathing cha...

AI Technical Summary

Problems solved by technology

However, existing waterproof materials are more limited to flexible materials such as "coiled materials and coatings". For example, coiled materials, pastes, and oil products are used in engineering. High density will also prevent air from entering and exiting in cement concrete; although high-density polymer membranes can effectively solve the problem of water leakage, they also have the disadvantage of sealing the concrete breathing channel

The interior of the concrete is in a humid environment. As the external environment changes, the internal free water will evaporate. When the evaporation channel is completely closed, a large vapor pressure will be generated at the interface between the concrete and the coil (or coating). It threatens the bonding performance of the coating or adhesive on the surface, and also accelerates the aging of the concrete, thus affecting its ultimate durability

In addition, organic waterproof materials are mostly flexible products. Although they have good crack resistance, when the strength is low, the surface is easily damaged by external mechanical impact. Once local water leakage occurs, the overall waterproof effect will be threatened. Although it is considered to make a rigid protective layer on its surface, on the one hand, the materials of the flexible waterproof layer and the rigid protective layer are different, the bonding performance is affected, and problems such as peeling of the protective layer are prone to occur. On the other hand, the flexible waterproof layer uses more emulsion. , the cost is high, plus the cost of the surface protection layer, the project cost is greatly increased

[0003] Most of the rigid waterproof mortars on the market are single-component polymer mortars, which are mixed with rubber powder instead of emulsion. Although they can be constructed by adding water and stirring, it is more convenient, and the water gel is relatively low, which has a good waterproof and anti-seepage effect. , but the viscosity of the slurry is relatively high, so it can only be applied by scraping, which not only affects the construction speed, but also the thickness and flatness of the waterproof layer are greatly affected by the construction level

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