| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To obtain lightweight aggregate by sintering incineration ash obtained from dehydrated sewage sludge or the like. <P>SOLUTION: The lightweight aggregate having a specific gravity lower than that of commercially available lightweight aggregate and compressive strength equivalent to or higher than that of the commercially available lightweight aggregate can be obtained by firing a mixture containing (a) the incineration ash obtained from the dehydrated sewage sludge or the mixture of the incineration ash and finely pulverized expansion shale having particle diameters of≤200μm, (b) boric acid or borax, and (c) a foaming agent within a range of 600-1,100°C. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
