| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide recycled concrete capable of exhibiting mechanical performance, or the like, equivalent to concrete using natural aggregate. SOLUTION: This recycled concrete consists essentially of a binder containing reducing period slag and gypsum, recycled aggregate obtained by crushing a concrete waste material and water, wherein. As the binder, ATK cement consisting of 65-80 wt.% of reducing period slag and 20-35 wt.% of gypsum, is preferred, and as the recycled aggregate, a mixture of recycled fine aggregate that has a fineness modulus of 2.5-3.0 and contains 20-30 wt.% of a fraction passing through a 0.3 mm sieve, and recycled coarse aggregate that has a fineness modulus of 6.3-7.3 and contains <=5 wt.% of a fraction remaining on a 40 mm sieve, or an unsieved crushed concrete waste material having <=40 mm (0-40 mm) particle size and a fineness modulus of 5.0-6.5, is preferred.</p> |
