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Lightweight concrete provides the advantage of reducing dead weight of structures. The aim of this study is to investigate the behavior of lightweight selfcured concrete produced using lightweight aggregate and cured in water for only 3 days. Five groups of mixes were prepared with different cement contents (350, 400 and 450 kg/m 3) and with or without silica fume. Each group consists of self-cured lightweight concrete mix containing 75% lightweight coarse aggregate cured in water for 3-days, lightweight concrete cured in water for 28-day, the control mix produced with normal weight aggregate cured for 28-days. Compressive, tensile, and flexural strength were measured to evaluate the mechanical properties of concrete, while water absorption, permeable voids, permeability, and abrasion resistance were measured to evaluate the physical properties of self-cured lightweight concrete compared with normal weight concrete. It was found that it is feasible to apply self-curing technique on lightweight concrete by lowering the curing time in water from 28 days to 3 days, which is beneficial in the conservation of water as it has a minor effect on the physical and mechanical properties of concrete and this negative impact can be overcome by increasing the cement content or using silica fume.