Redispersible polymer powder improves the weaknesses of traditional cement mortar such as brittleness and high elastic modulus, and gives cement mortar better flexibility and tensile bond strength to resist and delay the formation of cracks in cement mortar. Since the polymer and mortar form an interpenetrating network structure, a continuous polymer film is formed in the pores, which strengthens the bond between aggregates and blocks some of the pores in the mortar. Therefore, the performance of the hardened modified mortar is greatly improved over that of cement mortar.
As an indispensable decorative material in decoration, wall putty is a base material for wall leveling and repairing, and is a good foundation for other decorations. The wall surface can be kept smooth and uniform by applying wall putty, so that the subsequent decoration project can be carried out better. Wall putty is generally composed of base material, filler, water and additives. What are the main functions of redispersible polymer powder as the main additive in wall putty powder?
① Effects on fresh mortar;
A、Improve construction performances;
B、Provide additional water retention improves hydration;
C、Increase workability;
D、Avoid early cracking
② Effect on hardening mortar:
A、Reduce the elastic modulus of mortar and increase its suitability matching with base layer;
B、Increase flexibility and resist cracking;
C、Improve resistance of powder dropping off.
D、Water repellent or reduced water absorption
E、Increase adhesion to the base layer.
Post time: Jan-08-2025