Redispersible Latex Powder as an Additive for Construction Mortar
Release Time:
2021-10-28
Source:
Latex powder
As the dosage of latex powder increases, the cohesion and water retention of the mortar improve markedly, leading to optimized workability. When the latex powder content reaches 2.5%, the mortar’s workability fully meets construction requirements. However, if the latex powder dosage is too high, the EPS insulation mortar becomes excessively sticky and exhibits poor flowability, which hinders construction and also increases the cost of the mortar.
SAE latex powder exhibits a certain water-reducing effect. At a given flowability, as the dosage of SAE latex powder increases, the water demand of cement mortar gradually decreases, and the water-reduction ratio progressively rises. The incorporation of SAE latex powder can introduce an air content of 9.8% to 13.0% into fresh cement mortar. Moreover, the water retention of cement mortar is significantly improved with the addition of SAE latex powder. SAE latex powder enhances the water-retention capacity of cement mortar both in the fresh and hardened states, effectively preventing moisture loss.
Currently, redispersible latex powder plays a crucial role as an additive in construction mortars. When incorporated into mortars, it enables the formulation of a wide range of mortar products, including tile adhesives, thermal insulation mortars, self-leveling mortars, putties, plastering mortars, decorative mortars, grouting materials, repair mortars, and waterproofing and sealing compounds, thereby expanding both the application scope and performance characteristics of construction mortars. Of course, redispersible latex powder exhibits compatibility challenges when used in combination with cement, mineral admixtures, and chemical admixtures; these issues must be given due consideration during practical applications.
