| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a water-retainable block having both of excellent water percolation properties and water retainability, and further having high pumping performance, and to provide its production method. <P>SOLUTION: The concrete block comprises a water-retaining material composed of porous particulates, and has a water-retaining content of ≥0.15 g/cm<SP>3</SP>, a sucking height of ≥70% and the coefficient of water permeability of ≥0.01 cm/sec. Preferably, the water-retaining material is composed of porous particulates with the average particle diameter of 0.15 to 1.2 mm composed of papermaking sludge incineration ash, and the water-retaining block comprises the water-retaining material of 37.5 to 87.5 pts.mass to 100 pts.mass of cement. <P>COPYRIGHT: (C)2007,JPO&INPIT |
