In cement mortar and gypsum-based slurry, HPMC mainly plays the role of water retention and thickening. It can effectively improve the binding force and anti-pituitarism of the slurry.
Air temperature, air temperature and air pressure velocity affect the volatilization rate of water in cement mortar and gypsum based products.
In different seasons, there are certain differences in the water retention effect of HPMC. In specific construction, the water retention effect of the slurry can be adjusted by increasing or decreasing the amount of HPMC added. The water retention of methyl cellulose ether under high temperature conditions is an important indicator to distinguish the quality of methyl cellulose ether. Excellent HPMC series products can effectively solve the problem of water retention under high temperature.
In the high temperature season, especially in hot and dry areas and thin-layer construction on the sunny side. High quality HPMC is required to improve the water retention of the slurry. It can improve the ability of the oxygen atom on the hydroxyl group to form a hydrogen bond with the ether bond. Make free water into bound water, so as to effectively control the evaporation of water caused by high temperature weather. High water retention level.
High-quality cellulose HPMC can be uniformly and effectively dispersed in cement mortar and gypsum-based products. And wrap all the solid particles to form a wetting film. The moisture in the base layer is gradually released for a long time, and the inorganic gelling material undergoes a hydration reaction. Thereby ensuring the bond strength and compressive strength of the material. Therefore, it should be constructed in high temperature summer to achieve water retention effect. Be sure to add high-quality HPMC products according to the formula, otherwise there will be quality problems such as insufficient hydration. But it also increases the construction difficulty of workers. As the temperature drops, the amount of HPMC can be gradually reduced, and the water retention effect can also be achieved.