Abstract
This paper presents the development of lightweight self-consolidating concrete (LWSCC) using three types of lightweight aggregates, namely furnace slag, expanded clay, and expanded shale. Fresh properties of LWSCCs were evaluated by slump flow/J-ring flow diameter, V-funnel flow time, J-ring height difference, L-box ratio, filling capacity, and sieve segregation. Besides fresh/28-day air/oven dry unit weights, the mechanical properties such as 7-, 28-, and 91-day compressive/flexural/tensile strength and bond strength were also evaluated. The flowability and workability improved and the segregation resistance increased with the increase in packing density of aggregates. The quality, size, and volume of coarse aggregate affected the flexural strength while quality of interfacial transition zone and paste-aggregate bonding affected the split tensile strength. Bond strength was affected by the fresh properties, paste quality, compressive strength, and aggregate type. Correlations between strength and bond properties are described illustrating Code-based equations.
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