Admixture and extrudable hydraulic composition

摘要

An admixture comprising (A) a nonionic water-soluble hydroxyethyl cellulose and/or hydroxyethyl ethyl cellulose having a viscosity of at least 500 mPa.s as measured in a 1 wt % aqueous solution at 20° C., and (B) another nonionic water-soluble cellulose ether having a viscosity of at least 1,500 mPa.s as measured in a 1 wt % aqueous solution at 20° C. is suited for use in extrudable hydraulic compositions, because the hydraulic compositions comprising the admixture are effectively extrudable into hardened products having improved surface properties, minimized spring-back and good dimensional accuracy.