The Roles of Adhesive Powder and Cellulose in Tile Adhesive
Release Time:
2020-11-02
Source:
Rubber powder cellulose
The Roles of Adhesive Powder and Cellulose in Tile Adhesive
In the wet-mix state, rubber powder modifies the system’s consistency and smoothness; the addition of latex powder enhances cohesive strength; upon drying, it provides bonding strength for a smooth, dense surface layer and improves the interfacial interaction between aggregates and air voids. With a guaranteed addition level, it enriches the interface to form a dense film, imparting flexibility to the tile adhesive and reducing its elastic modulus. This significantly absorbs thermal deformation stresses, while also providing water resistance upon subsequent exposure to water, thereby offering effective cushioning.
Temperature and material deformation are inconsistent. The flexibility and rigidity of polymer powders can generally be determined based on their glass transition temperature: those with a glass transition temperature below 0°C tend to be more flexible. As for which type of polymer powder is needed in mortar, generally…
The selection should be based on the performance characteristics of the product. For tile adhesives, adhesive powder with strong bonding strength should be chosen.
HP cellulose imparts excellent water retention and workability to fresh mortar, playing a particularly critical role in ensuring adequate wetting of the substrate. To ensure the smooth progression of the hydration reaction, it can prevent excessive water absorption by the substrate and Surface moisture evaporates. Due to its air-entraining properties, the density of the tile adhesive is reduced, resulting in material savings and a lower elastic modulus of the hardened mortar matrix.
Cement exhibits high compressive strength, a high modulus of elasticity, and good water resistance; however, when used as an intermediate layer in cladding systems, its bond strength—essential for effective performance—depends largely on the properties of both the substrate and the cladding material. Porosity arises because the cement mortar infiltrates the voids and hardens before initial set, thereby providing an anchoring effect akin to a key fitting into a lock; however, its high elastic modulus prevents the elimination of stresses at the interface between the surface layer and the substrate due to shrinkage.
Inconsistent deformation caused by temperature changes and other factors generates internal stresses that, if not relieved, lead to delamination and cracking.
