| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain lightweight concrete by incorporating a foaming agent-free concrete stock with a specific amount of powder made by pulverizing lightweight cellular concrete scraps to a specified granular size or smaller so as to render plain concrete lighter and expand the range of recycling lightweight cellular concrete scraps. SOLUTION: This lightweight concrete is obtained by incorporating a foaming agent-free concrete stock with, based on the solid content of the concrete stock, 15-30 wt.% of powder made by pulverizing lightweight cellular concrete scraps to a granular size of <=1.0 mm; wherein the above scraps to be used include scraps produced in the manufacturing process for lightweight cellular concrete, chips produced in using lightweight cellular concrete panels and/or blocks as structural materials for structures or buildings and scraps resulted from dismantling them. This lightweight concrete product thus obtained is such one as to be about 1.8 in specific gravity while maintaining its mechanical strength similar to those of plain concrete products manufactured by conventional method.</p> |
