Fracture and Tension Properties of Roller Compacted Concrete Cores in Uniaxial Tension

This paper deals with the behavior of roller compacted concrete (RCC) cores in uniaxial tension cored from a practical RCC dam. Properties included are tensile strength, peak strain, modulus of elasticity, fracture energy, brittleness, complete stress-deformation curve, and stress-crack width curve both for the RCC matrix and the interface. Two categories of compressive strengths of RCC, 15 and 20 MPa, respectively, were tested in order to investigate the effect of RCC compressive strength on their behaviors. Two categories of specimen sizes of RCC, 150×300 mm and 250×500 mm cylindrical specimens, were also tested in order to investigate the effect of specimen size on their behaviors. The complete stress-deformation curves for RCC specimens were achieved by using a servohydraulic closed-loop testing system and four extensometers, of which the extensometer indicating maximum deformation is employed as feedback signal. Based on the stress-deformation curves, their stress-crack width curves were also obtaine...