Muthanna Journal of Engineering and Technology
Volume (3), Issue (2), Year (30 December 2015), Pages (69-79)
Research Article By:
Jamal Abdul-Samad Khudair and Aqeel Hatem Chkheiwer
Corresponding author E-mail: email@example.com
This study investigated the influence of type of concrete (self compacting concrete (SCC) and normal concrete (NC)) and compressive strength (30, 50 and 62 MPa) on the flexural and shear behavior of reinforced concrete beams, as well as punching shear of slabs. To achieve these targets, 18 beams and 6 slabs are equipped, tested and assessed. The tested beams were divided into three groups, the first group consists of six beams failed in flexure, the second group contains six beams without web reinforcement failed in shear with shear span/depth ratios of 3 (slender beams), the third group consists of six beams without web reinforcement failed in shear with shear span/depth ratio of 1 (deep beams), each group consisted of three SCC and three NC geometrically similar rectangular beams of different concrete strengths. Test results indicated that, for beams failing in flexure, SCC beams showed similar ultimate load to NC beams. For slender beams failing in shear, the ultimate load for beams with fc’ of about 32 and 48 MPa, NC beams showed 6.75 % higher ultimate load compared with SCC beams, but beams with fc’ of about 62 MPa, SCC and NC beams showed almost the same ultimate load value. For deep beams, no considerable difference in ultimate loads for SCC and NC beams was noticed. For the six geometrically similar slabs (three slabs made with SCC and three slabs made with NC of different concrete strengths) which were designed to fail in punching shear, it was found that, SCC slabs exhibited 17.25 % higher ultimate punching shear load than NC slabs.
Keywords: Self-compacting concrete, structural behavior, flexure, shear, punching shear.