Redispersible polymer powder is non-toxic and environmentally friendly. It is an important additive for new building materials. Adding redispersible polymer powder to the mortar changes the pore structure of the mortar, reduces the density of the mortar, enhances the internal cohesion of the mortar, and improves the water absorption capacity of the mortar. ; Adding redispersible polymer powder to the mortar increases the freeze-thaw resistance of the mortar; the good cohesiveness of the redispersible polymer powder makes the mortar also have good cohesiveness, especially for bonding mortar. , greatly improving the comprehensive performance of mortar; using polymer powder to modify cement mortar can produce dry powder mortar with different functions, providing a broader market prospect for the commercialization of mortar. It can create favorable conditions for adopting new technologies and materials, implementing strict quality control, improving construction methods, and ensuring project quality.
The role of redispersible polymer powder in mortar:
1 Improve the compressive strength and flexural strength of mortar.
2 The addition of polymer powder increases the elongation of the mortar, thereby improving the impact toughness of the mortar, and also endows the mortar with a good stress dispersion effect.
3 Improve the bonding performance of mortar. The bonding mechanism is based on the adsorption and diffusion of macromolecules on the sticky surface. At the same time, the polymer powder has a certain permeability and fully infiltrates the surface of the base material with cellulose ether, so that the surface properties of the base and the new plaster are close, thereby improving Adsorption greatly increases its performance.
4 Reduce the elastic modulus of mortar, improve deformation ability and reduce cracking phenomenon.
5 Improve the wear resistance of mortar. The improvement of wear resistance is mainly due to the existence of a certain amount of glue on the surface of the mortar. The glue powder acts as a bond, and the omentum structure formed by the glue powder can pass through the holes and cracks in the cement mortar. Improves the bond between the base material and cement hydration products, thereby increasing wear resistance.
6 Give the mortar excellent alkali resistance
Resin polymer powder has a strong smell, is not environmentally friendly, and is cheap, but its water absorption resistance, strength, and other properties are obviously inferior to redispersible polymer powder. Therefore, after a comprehensive comparison, redispersible polymer powder is more suitable for use in mortar.