Effect of hydroxypropyl methyl cellulose HPMC on cement-based building materials mortar

Building special hydroxypropyl methyl cellulose products are widely used to improve the performance of hydrocoagulable building materials, such as cement and gypsum. In cement-based mortars, it improves water retention, prolongates correction time and opening time, and reduces run-off.
1, water retention

Building special hydroxypropyl methyl cellulose to avoid water infiltration into the wall. The appropriate amount of water stays in the mortar, so that the cement has a longer time for hydration. The water retention is proportional to the viscosity of the cellulose ether solution in the mortar. The higher the viscosity, the better the water retention. As the water molecules increase, the water retention decreases. Because for the same amount of building special hydroxypropyl methyl cellulose solution, the increase in water means the viscosity decreases. The increase of water retention will lead to the extension of the curing time of the mortar under construction.
2, improve the construction
The application of hydroxypropyl methyl cellulose HPMC can improve the mortar construction property.
3. Lubrication ability
All air entraining agents act as wetting agents by reducing surface tension and helping the fine powder in the mortar to disperse when mixed with water.
4, anti-flow hanging
Good anti-flow mortar means that there is no danger of flow hanging or downward flow when working in thick layers. The resistance to current hanging can be improved by building special hydroxypropyl methyl cellulose. Especially the newly developed building special hydroxypropyl methyl cellulose can provide mortar better flow resistance 5, 5, bubble content
High bubble content leads to better mortar yield and workability, reducing cracking formation. It also reduces the strength value, "liquefaction" phenomenon. The bubble content usually depends on the stirring time.