Due to weakness of constructing performances, low efficient human resources and countries’ seismicity condition, reducing weight and increasing quality of concrete structures seems to be necessary. Thus, using lightweight aggregate and self-compacting concrete could be considered as an appropriate solution. So far, due to numerous advantages of self-compacting concrete, extensive researches have been done on it. But nevertheless, small portion of those researches has been devoted to lightweight self-compacting concrete (SCLC). Therefore better understanding of SCLC in fresh and hardened state was an objective of this thesis. Production of Portland cement, and essential constituent of concrete, leads to the release significant amount of CO2; one ton of Portland cement clinker production is said to create approximately one ton of CO2 and other greenhouse gases so use of natural Pozzolans, GGBS, silica fume and limestone and other similar Pozzolanic materials can reduce the use manufactures Portland cement clinker; and at the same time, reduce concrete that is more durable. In this thesis limestone, GGBS and silica fume are used instead of some Portland cement. The combination of the advantages of reducing amount of cement in concrete, lightweight concrete and self-compacting concrete is the purpose of this thesis. In this research, 57 experiments of lightweight self-compacting have been carried out. In the concrete fresh state, slump-flow with T500 and V-Funnel are used for evaluating self-compatibility criteria. In studying test performances, it has been found that, suitable range of V-Funnel for identify self-compatibility were observed different from SCC with regular aggregates. In concrete hardened state parameters as, compressive strength at age of 7, 28 and in some items 90 days were studied as experiments output. Replacement of GGBS and limestone up to desired viscosity leads to increasing compressive strength of concrete. Key Words Lightweight concrete, Self-Compacting Concrete, Lightweight Self-Compacting Concrete, GGBS, Limestone, silica fume
