Proceedings of the Fifth North American Conference on the Design and Use of Self-Consolidating Concrete, Chicago, Illinois, USA, May 12–15, 2013 – Sells, Myers and Volz 1 Shear Behavior of Mid-Scale Precast Prestressed Concrete (PC) Members Fabricated with Self-Consolidating Concrete (SCC) and High-Strength Self-Consolidating Concrete (HS-SCC) Eric B. Sells, 1 John J. Myers, 2 and Jeffery S. Volz 3 1 Graduate Research Assistant, Missouri Univ. of Science and Tech., 325 Butler Carlton Hall, Rolla, MO 65409 ebsn87@mst.edu 2 Associate Professor, Missouri Univ. of Science and Tech., 325 Butler Carlton Hall, Rolla, MO 65409 jmyers@mst.edu 3 Assistant Professor, Missouri Univ. of Science and Tech., 331 Butler Carlton Hall, Rolla, MO 65409 volzj@mst.edu ABSTRACT: Self-consolidating concrete (SCC) is highly flowable, non-segregating concrete that can be placed with no mechanical consolidation. SCC has the potential for numerous advantages over conventional concrete (CC) which include, but are not limited to: -Reduced labor, equipment, and associated cost -Is cast with desired mechanical properties, independent of placement crew skill -Accelerated construction -Enables filling of complex formwork or members with congested reinforcement -Decrease employee injuries -Permits more flexible reinforcement detailing and design -Creates smooth, aesthetically appealing surfaces Many SCC mixes use a reduced content of course aggregate with smaller MAS gradations to obtain the flowability requirements. Concerns related to the shear contribution from aggregate interlock have therefore emerged particularly for mixes that may be used for long-span bridge elements. In this paper precast, prestressed beams were fabricated and tested in shear for this investigation with four baseline mixtures used throughout this project including a 6 ksi (41.4 MPa) target strength limestone CC and SCC, and a 10 ksi (68.9 MPa) target strength limestone CC and SCC. These mixes were tested under four point loading. Crack propagation patterns and deflections during beam loading were also recorded. The beams were tested to evaluate the concrete shear strength prediction equations from ACI, AASHTO, and the MCFT. Results exhibited comparable behavior to CC on a shear stress normalization basis. Keywords: Shear behavior, high-strength -SCC, SCC, SCC state and national usage survey, experimental testing, code comparison.