| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a lightweight water-retentive block which has excellent transportability, operability and water retaining performance and is effective for relaxing a heat island phenomenon. <P>SOLUTION: A hydraulic composition containing cement, paper sludge ash and perlite is admixed with kneading water, and is pressure molded. In the blending, the unit cement quantity is controlled to 190 to 220 kg/m<SP>3</SP>, the unit paper sludge ash quantity is controlled to 80 to 120 kg/m<SP>3</SP>, the unit pearlite quantity is controlled to 100 to 125 kg/m<SP>3</SP>, and alkali resistant natural cellulose short fiber is mixed in amount of 4 to 6 kg/m<SP>3</SP>. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
