| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a regenerated aggregate concrete compsn. which is usable for structures, such as retaining walls and the lower works of bridges, as well, and with which the higher strength and lower shrinkage by drying are obtain able and to widen the use of the regenerated aggregate. SOLUTION: This concrete compsn. is formed by using the regenerated aggregate which contains the alcohol compd. expressed by ROH at 0.5 to 10wt.% of the cement and a water-reducing agent at 0.05 to 5wt.% of the cement and having the water absorptivity of the regenerated fine aggregate of <=11wt.% in concrete of water/cement ratio of >=50wt.% formed by using the regenerated aggregate. In the formula, R is 4 to 6C alkyl group or 5 to 6C cycloalkl group.</p> |
