| 摘要 |
<p>1,151,546. Concretes. MARTIN-MARIETTA CORP. 16 Aug., 1966 [23 Aug., 1965 (2)], No. 36623/66. Heading C1H. An hydraulic mix comprises Portland cement, aggregate and, as additive, a portion of the tobacco plant. Up to 2% can be added, but if an extract is used 1 % is the maximum. Aqueous mixtures of tobacco plant and molasses can be heated together to form the additive, if desired with a compound N(ROR<SP>1</SP>) 3 (R being divalent alkylene or arylene and R<SP>1</SP> hydrogen, alkyl or aryl), e.g. triethanolamine.</p> |
