Abstract:
This paper presents the structural behavior of locally manufactured self-consolidating lightweight concrete (SCLWC) in comparison with self-consolidating normal weight concrete (SCNWC). In addition, cement is replaced by the Fly ash (FA) and Lime Stone Powder (LSP) in concrete. The bloated shale aggregate (BSA) was manufactured by expanding shale pellets of varying sizes by heating them up to a temperature of 1200 ͦC using natural gas as fuel in the rotary kiln. The main parameters studied in this investigation were the compressive strength, stress strain curve, modulus of elasticity and ultimate ductility of the concrete members made from the BSA and then were compared with self-consolidating normal weight concrete (SCNWC) using crushed stone as coarse aggregate. Four formulations have been made, one the control mix and the second having 20% replacement of cement with Fly ash and lime stone powder both having the same proportion by weight. The fresh properties and hardened properties of SCLWC and SCNWC were studied. The Slump flow, V-funnel, J-Ring and L-box tests of SCLWC were conducted and it gives the suitable result when compared with SCNWC. There is no significant (2-4%) reduction in the compressive strength of SCLWC while 16.1% reduction in flexural strength is noted. Light weight aggregates tend to shift concrete behavior from ductile to brittle causing reduction in flexural strength. Addition of LWA reduced the density of SCLWC up to 35%. This reduction in density can reduce the verall cost of the structure because of dead load reduction.”
