Post Date:24,Jul,2023

Self leveling mortar can rely on its own weight to form a flat, smooth, and sturdy foundation on the substrate for laying or bonding other materials, and can also carry out large-scale and efficient construction. Therefore, high fluidity is a very significant feature of self leveling mortar; In addition, it must also have a certain degree of water retention and bonding strength, without the occurrence of water separation, and have the characteristics of insulation and low temperature rise. Generally, self leveling mortar requires good fluidity, but the actual fluidity of cement slurry is usually only 10-12cm; Cellulose ether is a major additive in ready-mixed mortar. Although the amount added is very low, it can significantly improve the performance of the mortar. It can improve the consistency, workability, bonding performance, and water retention performance of the mortar. It plays a very important role in the field of pre mixed mortar.

1. Liquidity
Cellulose ether has a significant impact on the water retention, consistency, and construction performance of self leveling mortar. Especially as a self leveling mortar, flowability is one of the main indicators for evaluating the self leveling performance. On the premise of ensuring the normal composition of the mortar, the fluidity of the mortar can be adjusted by changing the dosage of cellulose ether. However, excessive dosage can reduce the fluidity of the mortar, so the dosage of cellulose ether should be controlled within a reasonable range.

2. Water retention
The water retention of mortar is an important indicator to measure the stability of the internal components of freshly mixed cement mortar. In order to make the gel material fully hydrated, the reasonable amount of cellulose ether can maintain the moisture in the mortar for a long time. Generally speaking, the water retention rate of the slurry increases with the increase of cellulose ether content. The water retention effect of cellulose ether can prevent the substrate from absorbing water too much or too quickly, and hinder water evaporation, thus ensuring that the slurry environment provides sufficient water for cement hydration. In addition, the viscosity of cellulose ether also has a significant impact on the water retention of mortar. The higher the viscosity, the better the water retention. Cellulose ether with a general viscosity of 400mpa. s is commonly used in self-leveling mortar, which can improve the leveling performance and compactness of the mortar.