Improving The Physical And Mechanical Properties Of Recycled Concrete Aggregates (RCA) By Treatment With Lime And Cement

Abstract

In the light of the global tendency toward sustainability and the widespread use of recycled concrete aggregates (RCA) in civil structures works.

However , due to  their  low quality compared with natural aggregates because of the weak porous texture surrounding them, many different treatment techniques have been developed with proven their efficiency in improving the overall quality significantly. Surface treatments are considered as one of the most successful applicable and convenient treatment methods for improving RCA properties.

 In this research, we have performed surface treatment of RCA using lime and cement in several ways and ratios ranging from 2-4%.

The results of the research revealed that lime was the best in improving the physical and mechanical properties of aggregates up to 55%, then cement and cement with lime up to 50% depending on the percentage of the added material, all these make these aggregates a reliable and sustainable alternative to natural aggregates and increases their use rates.