redispersible polymer powder used in mortar

The role of redispersible polymer powder in mortar can be considered as follows: firstly, under the action of hydrophilic protection colloid and mechanical shear force, powder particles are mixed into mortar and dispersed in water to rapidly form a film, so as to increase the air content of mortar and improve the construction liquidity of mortar.Secondly, with the consumption of water, including evaporation and inorganic cementitious material hydration consumption, resin particles gradually close, the interface gradually blurred, resin overlap.An appropriate amount of polymer powder can form a continuous polymer film, and the framework system formed by inorganic and organic adhesives, namely, the brittle frame formed by hydraulic pressure.The frame system composed of polymer resin film forming at the gap on the surface of aggregate particles can improve the deformation ability and bonding ability of mortar as a whole due to the improvement of polymer flexibility and deformability.