STRUCTURAL-PROPERTIES OF HIGH-STRENGTH CONCRETE AND ITS IMPLICATIONS FOR PRECAST PRESTRESSED CONCRETE

Experimental data on the structural properties of high strength concrete left bracket f prime //c greater than 6000 psi (42 MPa) right bracket are reported. Based on these findings, as well as data on normal strength concrete, empirical expressions are proposed. The implications of such parameters as compressive strength, compressive stress-strain curve, modulus of elasticity, tensile strength, shear strength, Poisson's ratio, ductility, lateral reinforcement, as well as economic considerations for the structural design of prestressed concrete are studied and design recommendations are made.