| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a super quick hardening underwater non-segregating and self-leveling cement composition capable of placing underwater while kneading with a mobile batch mixer, with little water pollution even placing underwater, with non-segregating property, and self-leveling property, and also capable of obtaining short time age strength, by adding a fly ash cellulose based underwater non-segregating admixture and a water reducing agent to super-quick hardening cement. SOLUTION: The composition of the super quick hardening underwater non- segregating cement is obtained by mixing into super quick hardening cement the fly ash of 20-30 wt.%, as an admixture of a fluidization auxiliary agent, the cellulose based underwater non-segregating admixture of 0.5-0.7 wt.% as an underwater non-segregating admixture, and a melamine based high performance water reducing agent of 2.0-3.5 wt.% as a water reducing agent, wherein the wt.% is expressed in terms of replacement rate to the mass of the super quick hardening cement.</p> |
