LAUSR

Abstract The effects of maximum size of aggregate (dmax), light expanded clay coarse aggregate (LECA) content, and volume fraction of micro steel fibers (Vf) on the properties of self-compacting lightweight concrete (SCLWC) were investigated. A total of 18 mixes with dmax of 10, 14, and 20 mm, LECA contents of 50% and 100%, and Vf of 0.25, 0.5, and 0.75% were prepared. The investigated fresh properties were fresh density, slump flow, T50 cm, V-funnel flow time, and L-box height ratio, while the investigated hardened properties were compressive strength, flexural strength, oven dry density, water sorptivity, drying shrinkage and weight loss. The results revealed that increasing dmax led to decrease the superplasticizer dosage required to keep the slump flow at 700–750 mm. The dmax of 10 mm gave the best compressive and flexural strengths. The water sorptivity was generally higher as the dmax, LECA content, and Vf increased. The drying shrinkage, on the other hand, was generally diminished with increasing dmax and Vf.