Study on the properties of cellulose ether-modified fly ash-based thin spray materials.

Cellulose ether (hydroxyethyl cellulose ether, hydroxypropyl methyl cellulose ether) was used to modify the bonding properties of fly ash-based thin spray materials, and the effects of viscosity and substituent of cellulose ether on the bonding strength, consistency, and its tensile strength and compressive strength of the fly ash-based thin spray materials were studied, and the microstructure of the fly ash-based thin spray materials before and after the incorporation of cellulose ether into the 28 d specimens was studied by scanning electron microscopy. The results showed that the bond strength of the thin-sprayed materials was significantly improved af ter the addition of cellulose ether, with a maximum increase of 294.23% compared with that of the unadulterated cellulose ether group. Under the same substituent, the bonding performance of the cellulose ether samples with low viscosity was higher. Under different substituents, the bond strength of hydroxyethyl cellulose ether specimens was higher, and the adverse effect on mechanical properties was smaller. The 28 d bond strength of fly ash-based thin spray material incorporated with 0.05% (mass percentage of cementitious material) hydroxyethyl cellulose ether (HEC) reached 1.67 MPa, and the compressive strength was 11.4 MPa. [ABSTRACT FROM AUTHOR]