| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide artificial aggregate which can stably be produced at a low cost through a firing stage and the fusion of which is hardly caused in the firing stage and also which has specific gravity, water absorption, etc., meeting the respective specifications specified in JIS A 5005 'crushed stone and manufactured sand for concrete'. SOLUTION: As this admixture for an artificial aggregate raw material, incineration ash of papermaking sludge is used.</p> |
