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Functions of RDP Redispersible Latex Powder Additive in Construction Mortar

Views:1     Author:Site Editor     Publish Time: 2020-10-20      Origin:Site

Redispersible latex powder, mainly used in dry cement mortar in the construction industry, is an important additive for dry cement mortar.   Redispersible latex powder, has a significant effect in dry cement mortar.

 

It can improve the bonding strength and cohesion of the material.

Improve the elastic bending strength and flexural strength of the material.

Improve the freeze-thaw resistance of the material.

Improve the weather resistance, durability and wear resistance of the material.

Improve the hydrophobicity of the material and reduce the water absorption.

Improve workability and reduce material shrinkage.

Can effectively prevent cracking.


  Improve bonding strength and cohesion
  It is extremely necessary to add redispersible latex powder to cement dry powder mortar products. It is very obvious to improve the bonding strength and cohesion of materials. This is due to the penetration of polymer particles into the pores and capillaries of the cement matrix and the formation of good cohesive strength after hydration with the cement. Moreover, because of the excellent adhesion of polymer resins, it is improving the adhesion of cement mortar products to substrates, especially cement, which is an inorganic binder, to wood, fiber, PVC, EPS and other organic substrates. The improvement of poor sex is more obvious.
   Improve bending and tensile resistance
In the rigid framework formed by the hydration of cement mortar, the polymer film is elastic and tough. It acts like a movable joint between the cement mortar particles and the particles. It can withstand high deformation loads and reduce stress. The tensile and bending resistance are improved.
  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, relax without being damaged, thereby improving the impact resistance of the mortar.
  Improve water repellency  Reduce water absorption
  Adding redispersible latex powder can improve the microstructure of cement mortar. The polymer forms an irreversible network during the cement hydration process, seals the capillaries in the cement gel, blocks the absorption of water, prevents the penetration of water, and improves the impermeability.
  Improve abrasion resistance   Durability
  The addition of redispersible latex powder can increase the dense bond between cement mortar particles and polymer film. The enhancement of the cohesive force correspondingly improves the ability of the mortar to withstand shear stress, which reduces the wear rate, improves the wear resistance, and prolongs the service life of the mortar.
  Improve freeze-thaw stability  effectively prevent material cracking
   Redispersible latex powder, the plastic effect of its thermoplastic resin can overcome the thermal expansion and contraction of the cement mortar material caused by the temperature difference. Overcome the shortcomings of simple cement mortar, such as large shrinkage deformation and easy cracking, and make the material flexible, thereby improving the long-term stability of the material.


PTMA TECH is a provider of construction admixture for mortar, coatings & paints and concrete, which has three plants with R&D……
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