An experimental study was carried out to evaluate fresh properties of a moderately high-strength (high-flowing) selfcompacting\r\nconcrete (SCC) and to investigate shear behavior and performance of deep beams made with SCC. Fresh and hardened\r\nproperties of normal concrete (NC) and SCC were evaluated. The workability and compacting ability were observed based on\r\ncasting time and number of surface cavities, respectively. Four-point loading tests on four deep beams (two made with SCC and\r\ntwo with NC) were then conducted to investigate their shear behavior and performance. Shear behavior and performance of beams\r\nhaving two different web reinforcements in shear were systematically investigated in terms of crack pattern, failure mode, and\r\nloadââ?¬â??deflection response. It was found from the tests that the SCC specimen having a normal shear reinforcement condition\r\nexhibited a slightly higher load carrying capacity than the corresponding NC specimen, while the SCC specimen having congested\r\nshear reinforcement condition showed a similar load carrying capacity to the corresponding NC specimen. In addition, a comparative\r\nstudy between the present experimental results and theoretical results in accordance with ACI 318 (Building Code\r\nRequirements for Reinforced Concrete (ACI 318-89) and Commentary-ACI 318R-89, 1999), Hsuââ?¬â??Mauââ?¬â?¢s explicit method (Hsu,\r\nCem Concr Compos 20:419ââ?¬â??435, 1998; Mau and Hsu, Struct J Am Concr Inst 86:516ââ?¬â??523, 1989) and strut-and-tie model\r\nsuggested by Uribe and Alcocer (2002) based on ACI 318 Appendix A (2008) was carried out to assess the applicability of the\r\naforementioned methods to predict the shear strength of SCC specimens.
Loading....