An experimental study on axial tensile strength and tensile elastic modulus of commercial concrete

In order to avoid the early shrinkage cracking in concrete structure,the regularity of early mechanical properties with age is also controlled.The axial tensile strength and the tensile elastic modulus of concrete specimens(including 3 strength grades and 5 ages) are studied in detail.The formulas of the axial tensile strength with age are received.The conversion formulas between the axial tensile strength and the splitting tensile strength at different ages in 60-day are all received,meanwhile,the formula of tensile elastic modulus with age is obtained.The formula has much more modification and improvement,and can supply the important data and material to the 《code for design of concrete structures》(GB50010-2002).