Image Characterization Of Aggregate Interlock Of Self-Consolodating Concrete (Scc) Push Off Specimens

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. This paper introduces an imaging process to estimate the aggregate content within a failure shear zone using an aggregate interlock push off test. The concept of the high resolution imaging and processing procedure is to provide a less subjective means to estimate aggregate within a shear failure zone.