| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for producing a cement composition for a high- strength concrete having excellent fluidity and quality stability and a cement composition for shotcrete having high quality, capable of providing a cement composition comprising uniformly dispersed silica fume, having excellent quality stability and fluidity without causing an obstacle in an ordinary cement production process. SOLUTION: This method comprises producing a cement composition composed of 50-95 pts.wt. of Portland cement, 2-30 pts.wt. of silica fume and 3-40 pts.wt. of fine powder of limestone so as to make 100 pts.wt. total amount. When limestone is ground in a process for producing the fine powder of limestone, silica fume is added to a grinding facility, the obtained mixture of the silica fume and the fine powder of limestone are blended with Portland cement.</p> |
