| 摘要 |
<p>PCT No. PCT/GB92/01122 Sec. 371 Date Sep. 1, 1993 Sec. 102(e) Date Sep. 1, 1993 PCT Filed Jun. 19, 1992 PCT Pub. No. WO92/22513 PCT Pub. Date Dec. 23, 1992.A concrete mortar is formed by mixing together sand, cement, water and a sewage sludge ash. A foam is added to the mortar to form a foamed concrete composition.</p> |
