The influence of cellulose ether content on the basic properties of mortar: The incorporation of cellulose ether has a significant impact on the properties of the mortar. With the increase of the content, the workability and cohesiveness of the mortar are significantly improved, the fluidity loss over time is significantly reduced, the construction performance is more excellent, and the hardened mortar has no delamination, and the surface smoothness, smoothness and smoothness The aesthetics have been greatly improved. At the same time, the water consumption for the mortar to reach the same fluidity increased significantly. At 5‰, the water consumption increased by 102%, and the final setting time was extended by 100 min, which was 2.5 times that of the blank sample. The early mechanical properties of the mortar decreased significantly with the increase of the cellulose ether content. When the content was 5‰, the 24 h flexural strength and compressive strength decreased to 18.75% and 11.29% of the blank sample, respectively. The compressive strength was 39.47% and 23.45% of the blank sample, respectively. It is worth noting that with the increase in the amount of water-retaining agent, the bulk density of the mortar also decreased significantly, from 2 069 kg/m3 at 0 to 1 747 kg/m3 at 5‰, a decrease of 15.56%. The compactness of the mortar decreases and the porosity increases, which is one of the reasons why the mechanical properties of the mortar decrease significantly. Under normal circumstances, the higher the viscosity and fineness of cellulose ether, the better the water retention and the increase in bonding strength. At the same time, the viscosity or molecular weight of cellulose ether is too high, which will affect the fluidity, construction performance and mechanics of the mortar. Performance will have a negative impact. |