Application Technology of Cellulose Ether HPMC in Mortar

The role of cellulose ether HPMC in mortar is: water retention, increase cohesion, thickening, affect setting time, air permeability, because of these characteristics, it has a wide range of applications in building material mortar.

1. Water retention of cellulose ether HPMC is the most important feature of mortar application.
1) Influence of cellulose ether HPMC particle size and mixing time on water retention
The content of HPMC of cellulose ether is the same. As the viscosity increases, the water retention of the mortar increases; the content of cellulose ether increases, the viscosity increases, and the water retention of the mortar increases. When the cellulose ether HPMC content exceeds 0.3%, the water retention of the mortar tends to be balanced. The water retention capacity of the mortar is largely controlled by the dissolution time. The faster the dissolution rate of the cellulose ether HPMC, the faster the water retention performance will develop.
2) The effect of HPMC etherification degree and temperature on water retention
The higher the temperature, the lower the water retention. The higher the degree of etherification of the cellulose ether HPMC, the better the high temperature water retention of the cellulose ether.

2. The influence of cellulose ether HPMC on the gas content of mortar
In dry-mixed mortar products, due to the addition of cellulose ether HPMC, a certain amount of fine, uniformly distributed and stable bubbles are introduced into the fresh mortar. Consequences The effect of the bubble ball is that the mortar has good construction performance, reduces the cracking and shrinkage of the mortar, and increases the output of the mortar.
3. The influence of cellulose ether HPMC on cement hydration
Cellulose ether HPMC delays the hydration of cement-based mortar, and the delay effect increases with the increase of the amount of cellulose ether. Factors affecting the hydration of cellulose ether HPMC cement include: dosage, degree of etherification, and type of cement.