Hydroxypropyl methylcellulose (HPMC) is commonly used as an additive in wet mortar formulations to improve their properties and performance. HPMC is a water-soluble polymer that is derived from cellulose and is often used as a thickener, binder, and emulsifier in a wide range of applications.
In wet mortar, HPMC can help to improve workability, reduce water absorption, and enhance adhesion. When added to the mixture, it can provide a smoother texture and consistency, making it easier to apply and spread. HPMC can also improve the cohesion of the mortar, preventing it from separating or cracking during curing.
In addition, HPMC can enhance the durability and strength of wet mortar. It can improve the bonding strength between the mortar and the substrate, making it more resistant to water penetration and erosion. This is especially important in applications where the mortar will be exposed to harsh environmental conditions, such as in exterior or underground applications.
Overall, the addition of HPMC to wet mortar can result in improved workability, adhesion, strength, and durability.