الفهرس 
Abstract
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Abstract
This study investigates the effect of self-curing agents on the mechanical properties of concrete. The self-curing agent is prewetted lightweight aggregate crushed over burnt clay bricks COBCB. This Research is divided into two parts: the first part is trying to study the effect of replacing the coarse aggregate with lightweight aggregates in different proportions 20% ,50% and 100%. The mechanical properties were evaluated while the concrete specimens were subjected to different curing methods; conventional water curing, air curing regime (in the laboratory environment with 25°C) and chemical curing.