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Abstract

Numerous experimental and theoretical studies on recycled aggregate concrete have been carried out in the past 10 years. This paper presents several reviews of RAC. The review presented in this report clearly indicates an increasing trend and incentive for the greater use of manufactured and recycled aggregates in construction. There are, however, limitations to the use of such materials. This report focuses on the known benefits and limitations of a range of manufactured and recycled aggregates. A successful strategy must be based on both cost and performance. In terms of performance, many countries are focusing on recycled concrete aggregates (RCA) which is proven to be practical for non-structural concretes and to a limited extent for some structural-grade concrete. However, the processing and quality control cost associated with their use plus the premium paid for mix design adjustment to achieve the same strength grade as concrete with natural aggregates can vary considerably. In Iraq, there are a number of manufactured and recycled aggregates readily available in certain localities which have the potential to be used in construction.