| 摘要 |
<p>PURPOSE:To provide a high belite cement-based mixed cement actualizing more excellent low heat generation than existing moderate-heat cement and two- component cement, namely low heat generation equal to or more than that of three-component cement, having improved initial strength and bettered durability (especially neutralization resistance). CONSTITUTION:Mixed cement comprises (a) 55-90wt.%, of Portland cement prepared from low heat generating Portland cement clinker containing 60-90wt.% of C2S, (b) 5-30wt.% of powder consisting essentially of calcium carbonate, having >=5,000cm<2>/g specific surface area and (c) 5-40wt.% of blast furnace slag powder having >=4,000cm<2>/specific surface area.</p> |
