A TRIAL OF REDUCING AUTOGENOUS SHRINKAGE BY RECYCLED AGGREGATE

A possibility of reducing autogenous shrinkage by recycled aggregate which is much more absorbable than normal aggregate is investigated. Autogenous shrinkage as well as self-induced stress of recycled concrete with water to cement ratio of 0.25 is compared with those of companion normal concrete experimentally. The experiment shows that recycled aggregate is effective in reducing the autogenous shrinkage as well as its induced stress, while shrinkage strain of recycled concrete after exposed to the air is more significant than that of normal concrete.