HPMC chemical-What’s the effects of HPMC for the Cement-Based Building Material Mortar
Hydroxy Propyl Methyl Cellulose (HPMC) helps to significantly improve the water-holding capacity of mortar. Just a low level of hydroxypropyl methyl cellulose addition can lead to a significant improvement in the water retention rate of the mortar.
2. Improving Workability
The application of hydroxypropyl methyl cellulose can improve the workability of mortar.
3. Lubricating Ability
All air-entraining agents have the function of wetting agents, because they can reduce the surface tension and then help the fine powder in the mortar to disperse when mixing with water.
4. Sag Resistance
Another of the hydroxypropyl methyl cellulose effects. Good anti-sagging mortar means no sagging or downward flow hazards during thick-layer construction. The sag resistance can be improved by building special hydroxypropyl methyl cellulose, especially the newly developed building special hydroxypropyl methyl cellulose, which can provide the mortar with better sag resistance.
High bubble content can lead to better yield and workability of the mortar, and reduce the formation of cracks. Meanwhile, it also reduces the strength value, and the “liquefaction” phenomenon occurs. The bubble content usually depends on the stirring time. hydroxypropyl methyl cellulose products are widely used to improve the performance of hydraulic building materials, such as cement and plaster. In the cement-based mortar, it can improve the water-holding capacity, extend the correction time and opening hours, and reduce sagging phenomena.