hydroxypropyl methylcellulose HPMC in Plastering MortarFebruary 2nd 2023
It is necessary to add redispersible latex powder to dry cement mortar. This is because redispersible latex powder mainly has the following six advantages. The following is the introduction for you.
1. Improve bonding strength and cohesion
The redispersible latex powder has a great effect on improving the bonding strength and cohesion of the material. Due to the penetration of the polymer particles into the pores and capillaries of the cement matrix, it forms good cohesion with the cement after hydration, and the polymer resin itself has excellent The adhesion of cement cement mortar products to improve the adhesion of substrates, especially the inorganic binder such as cement to wood, fiber, PVC, EPS and other organic substrates poor adhesion improvement, the effect is more obvious.
2. Improve freeze-thaw stability to effectively prevent cracking of materials
Redispersible latex powder, the plasticity of its thermoplastic resin, can overcome the thermal expansion and contraction damage of cement mortar materials caused by temperature difference. Overcoming the simple shrinkage and deformation characteristics of simple cement mortar and easy cracking, it can make the material flexible and improve the long-term stability of the material.
3. Improve bending and tensile resistance
In the rigid skeleton formed by the hydration of cement mortar, the polymer film is elastic and tough. Between the particles of the cement mortar, it functions like a movable joint and can withstand high deformation loads, reducing stress and making Tensile strength and bending resistance are improved.
4. Improve impact resistance
Redispersible latex powder is a thermoplastic resin. The soft film coated on the surface of the mortar particles can absorb the impact of external forces and relax without breaking, thereby improving the impact resistance of the mortar.
5. Improve water repellency and reduce water absorption
Adding cocoa redispersible latex powder can improve the microstructure of cement mortar. The polymer forms an irreversible network during the cement hydration process, closes the capillary in the cement gel, blocks the penetration of moisture, and improves the impermeability.
6. Improve wear resistance and durability
Adding re-dispersible latex powder can increase the dense bond between the cement mortar particles and the polymer film. The enhancement of the bonding force correspondingly improves the ability of the mortar to bear the shear stress, so that the wear rate is reduced, the wear resistance is improved, and the service life of the mortar is extended.