EXPERIMENTAL RESEARCH ON SPLITTING TENSILE BEHAVIOR OF ADHESION BETWEEN HIGH PERFORMANCE CEMENT-MORTAR AND CONCRETE

This paper presents the experimental research on splitting tensile behavior of adhesion between high performance cement-mortar and concrete to understand the effect type of interface treatment,high performance cement-mortar and grade of concrete strength on the bonding property.The results indicate that the splitting tensile strength increases with the raise of concrete strength and high performance cement-mortar strength,and proper surface roughness of old concrete contributes to the adhesive behavior of high performance cement-mortar and concrete.Prominent property analysis of influential factors of splitting tensile strength shows cement-mortar strength is more prominent than the process of adhesion section and concrete strength is less.The model of the relationship between the splitting tensile strength and cement-mortar strength is set up according to the test results.