ABSTRACT
Mukai et al. (36) found that recycled concretes produced with coarse recycled aggregate and natural sand required approximately 101/m3 or 5% more free water than control concretes produced with corresponding natural aggregate, in order to achieve the same slump. Approximately 25 1/m3 or 15% more free water was required when both fine and coarse recycled aggregates were used. Similar results were found by Buck (26), Frondistou Yannas (32), Malhotra (29), Hansen and Narud (13), and by Ravindrarajah and Tam (65).
