MECHANICAL-PROPERTIES OF HIGH-PERFORMANCE CONCRETE

A test program was carried out to develop information about the mechan ical properties of high-performance concrete. High-performance concret es with 56-day compressive strengths of 65 to 120 MPa (with or without silica fume) were studied Results and discussions are presented regar ding compressive strength gain with time, effect of type of cement, ef fect of drying, specimen size effect, static modulus of elasticity, Po isson's ratio, tensile splitting strength, and modulus of rupture. A m odification of the ACI 318-M equation for the modulus of elasticity of normal-weight high-performance concrete is recommended. The validity of equations recommended by ACI 363R for estimating tensile splining s trength and modulus of rupture can be extended for high-performance co ncretes with or without supplementary cementitious materials and with 28-day compressive strengths up to 120 MPa.