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The early strength evolution of self-consolidating concrete (SCC) is studiedby a set of non-standard mechanical tests for compressive, tensile, shear andbending failure. The results are applicable in an industrial environment forprocess control, e.g. of slip casting with adaptive molds in roboticfabrication. A procedure for collapsing data to a master evolution curve ispresented that allows to distinguish two regimes in the evolution. In thefirst, the material is capable of undergoing large localized plasticdeformation, as expected from thixotropic yield stress fluids. This is followedby a transition to cohesive frictional material behavior dominated by crackgrowth. The typical differences in tensile and compressive strength of hardenedconcrete are observed to originate at the transition. Finally, the evolution ofa limit surface in principal stress space is constructed and discussed.

Evolution of Strength and Failure of SCC during Early Hydration