| 摘要 |
<p>1507856 Aggregate for concrete AMAX RESOURCE RECOVERY SYSTEMS Inc 16 May 1975 [19 July 1974] 20980/75 Headings C1H and C1A [Also in Division B2] A lightweight aggregate for concrete is produced by recovering from the burning of pulverized coal in a dry bottom furnace. Bottom ash not more than 25% passes through 100 mesh (US) and has less than 1% iron pyrites and not more than 5% SO 3 by weight. Particles exceeding # inches are preferably removed. Concrete mixes typically contain 8-20% cement, 10-50% sand and balance of the bottom ash.</p> |
