| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a cement composition which does not affect setting time even if washed dust is added when clinker is crushed, and to provide a method for producing the cement composition.SOLUTION: The cement composition includes cement clinker, gypsum and washed dust obtained by washing chlorine bypass dust. The cement clinker has a CS content of 45-65 mass%, a CS content of 14-24 mass%, a CA content of 8-13 mass%, and a CAF content of 8-13 mass%. The washed dust has a water content of 5-20 mass%. The cement composition contains 0.01-2.0 mass% of the washed dust and 0.5-3.0 mass% of gypsum, based on SO, and has a Blaine specific surface area of 3,000-3,500 cm/g.</p> |
