| 摘要 |
<p>PURPOSE: To obtain a cement composition excellent in fluidity, kneadability and strength developability, and suppressed in temperature rise during cure with suppressed heat generation during hydration. CONSTITUTION: This cement composition comprises a total of 100 pts.wt. of 50-92 pts.wt. of high-belite-based Portland clement, 5-25 pts.wt. of silica fume and 3-25 pts.wt. of limestone fine powder. The high-belite-based Portland cement stands reduced to a minimum in the amounts of both alite and aluminate constituting clinker mineral composition in the cement in order to reduce the heat of hydration to a minimum so as to prevent the temperature rise of the resultant concrete structural body and also stands sufficiently increased in the amount of belite excellent in long-term strength developability. Owing to using the high-belite-based Portland cement, heat generation due to cement hydration can be suppressed to low levels; therefore, in the resultant thick-walled high- strength concrete structural body, temperature rise is small, crack development prevented, and strength developability improved.</p> |
