| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To impart excellent moldability and strength development to a woody cement molding manufactured by blending a waste material of the woody cement molding as a raw material. <P>SOLUTION: The woody cement molding is manufactured by blending cement, the waste material of the woody cement molding, a woody material and silicon dioxide fine powder, which has≥98.0 mass% SiO<SB>2</SB>content,≤0.5 mass% ignition loss and 1-4.5 m<SP>2</SP>/g BET specific surface area, so that the amount of the silicon dioxide fine powder to be added by an inner rate is 5-50 mass% of the cement and hardening the obtained blended material. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
