Cement-based polymer waterproof mortar additive and its preparation method and application

Abstract

The invention relates to a cement-based high-molecular polymer waterproof mortar additive and a preparation method and application thereof. The additive comprises, by weight, 1-6 parts of polymer latex powder, 5-10 parts of anti-crack fiber, 2-5 parts of polyaspartic acid, 6-12 parts of rare earth oxide, 2-6 parts of attapulgite, 5-8 parts of modified sodium polyacrylate, 10-20 parts of coal ash, 8-10 parts of ground calcium carbonate, 0.2-0.6 part of water-reducing agent, 0.8-1.2 parts of antifoaming agent and 0.6-0.8 part of water-retaining agent. The cement-based high-molecular polymer waterproof mortar additive has the advantages that through the cooperation and coordination of all the components, the building use cost is effectively lowered, the project quality is effectively improved, and the building period is effectively shortened; the additive is a new-generation environment-friendly energy-saving building material, is added into waterproof mortar to be mixed with cement, gravel and water for use, has crack resistance, permeation resistance, waterproofness, dampproofness, freeze resistance, impact wear resistance and corrosion resistance and can accelerate hydration and dispersion of cement particles and reduce water consumption.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a cement-based polymer waterproof mortar additive and a preparation method and application thereof. Background technique [0002] The 21st century is a period of great economic development in China, but economic development requires a stable economic growth point as a guarantee. At present, infrastructure construction will still be a relatively important economic growth point in my country, and concrete structures play an important role in infrastructure construction. Because there are a large number of capillary pores and hydrophilic hydroxyl groups inside the concrete material, it is easy to absorb moisture in a humid environment, causing frost damage; at the same time, harmful substances (chloride ions, etc.) will also enter the interior of the material with moisture, accelerating the reinforcement of reinforced concrete. Corrosion; In addition, the soluble salt in ...

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Problems solved by technology

[0002] The 21st century is a period of great economic development in China, but economic development requires a stable economic growth point as a guarantee. At present, infrastructure construction will still be a relatively important economic growth point in my country, and concrete structures play an important role in infrastructure construction. Because there are a large number of capillary pores and hydrophilic hydroxyl groups inside the concrete material, it is easy to absorb moisture in a humid environment, causing frost damage; at the same time, harmful substances (chloride ions, etc.) will also enter the interior of the material with moisture, accelerating the reinforcement of reinforced concrete. Corrosion; in addition, the soluble salt in concrete is prone to water-soluble migration, forming salt frost on the surface of the building, affecting the appearance of the building

[0004] However, the existing cement-based polymer waterproof materials have different performances, resulting in longer construction period, higher cost, unstable quality, etc., which affect the use

For example, poor anti-corrosion performance: Concrete spalling on the building surface, carbonization and corrosion of steel bars have increasingly attracted people's attention, especially in some coastal cities and areas, due to the influence of humid sea breeze or damage by seawater erosion, many older concrete The surface of the building is severely damaged, and the steel bars are severely corroded

In addition, during the use of concrete, the aging phenomenon caused by factors such as ultraviolet radiation also seriously affects the service life of concrete and limits the use of concrete.

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