Report A : self-consolidating concrete (SCC) for infrastructure elements - shear characteristics.

Because of its unique ability to maintain high flow-ability and remain homogeneous,self-consolidating concrete (SCC) has the potential to significantly reduce the costsassociated with civil infrastructure; however, the use of higher paste and lower coarseaggregate volumes than non-SCC concretes raises concerns about the structural implicationsof using SCC. Of particular concern is the effect of concrete compressive strength, andaggregate type, shape, and content level on shear strength of SCC mixes. This researchfocused on the components that contribute to the concrete\u2019s ability to provide shearresistance, in particular, shear provided by aggregate interlock. Variables investigated bypush-off tests to determine the shear contribution from aggregate interlock included concretecompressive strength (6 and 10 ksi [41.3 and 68.9 MPa] target), coarse aggregate type(limestone and river gravel), and volumetric content level of the coarse aggregate portion(36%, 48%, 58%, and 60%). Post-failure digital imaging software was used to confirm freshconcrete parameters in the hardened state as well as check for variability and the impact onshear. Additional attention was given to the global contributions of shear by the concrete inlarger scaled tests of pre-stressed beam members. The results were used to assess theappropriateness of designing Missouri Infrastructure elements using the current AASHTOLRFD Bridge Design Specification for shear and while using typical Missouri SCC batchproportions and materials