The fresh, early-age, hardened, and durability properties of six precast and eight ready-mix concretes were determined at various testing ages over a period of two years. The intent was to assess the influence of the mixture type (precast or ready-mix), amount and type of cementitious materials, and variation among the concrete suppliers on the strength and durability characteristics of high-performance concrete (HPC). Target compressive strength, flexural strength, and shrinkage values were attained for the selected concretes. In addition, the hardened air-void parameters, conductivity (coulomb), chloride permeability, and freezing and thawing resistance were measured for each concrete. The correlation among chloride ponding results, coulomb values, and hardened air-void content was explored. The ACI 318M-05 equations for the modulus of rupture fr and modulus of elasticityEc were compared with the experimental test results. It was found that the ACI 318M-05 equation for the elastic modulus is applicable for HPC, while the ACI 318M-05 equation for the modulus of rupture is significantly conservative. Based on the research findings, a new modified equation for the modulus of rupture is recommended for HPC.
