Two kinds of self-compacting lightweight concretes(SCLC),of which densities are less than(1 950 kg/m~3,) were designed based on the method of ordinary self-compacting concrete,considering the water absorption of lightweight coarse aggregate.The workability of SCLC40 and SCLC50 was studied using the methods suggested by EFNARC 2005.The fluidity,deformability,filling ability and segregation resistance were evaluated by using the V-funnel test,slump flow test,L-box test,U-box test,sieve segregation test,column...