The role of latex powder in dry mortar is mainly the following aspects
1 Improve the compressive strength and flexural strength of mortar.
2 The addition of latex powder increases the elongation of the mortar, thereby improving the impact toughness of the mortar, and also gives the mortar a good stress dispersion effect.
3 Improve the bonding performance of the mortar. The bonding mechanism relies on the adsorption and diffusion of macromolecules on the sticky surface. At the same time, the rubber powder has a certain degree of permeability. Together with the cellulose ether, it can fully infiltrate the surface of the base material, so that the base layer and the new plaster have a surface performance close to that of the new plaster, thereby improving Adsorbability greatly increases its performance.
4 Reduce the elastic modulus of the mortar, improve the deformability, and reduce the cracking phenomenon.
5 Improve the wear resistance of the mortar. The improvement of abrasion resistance is mainly due to the presence of a certain amount of glue on the surface of the mortar. The rubber powder plays a bonding role. The net membrane structure formed by the rubber powder can pass through the holes and cracks in the cement mortar. The bonding between the base material and the cement hydration product improves the wear resistance.
6 Give the mortar excellent alkali resistance