Predicted Equations on Ultimate Bond Load of Strands-Cement System

To elucidate the bond behavior of strand-cement system with various parameters, this research manners a sequence of pullout tests. The bond stress-slip relationships are depicted. Additionally, this study establishes predicted equations of ultimate bond load with various parameters. The pullout tests are conducted through MTS (Material test system). Variables in this study contain compressive strength of cement body, bond length, and quantity of strand. The predicted equations for the ultimate bond load under different conditions can be established by using multivariate regression analysis for single strand-in-cement samples. The ultimate bond load estimated by the predicted equation is consistent with the test results. The ultimate bond load reduction factor is created by comparing the ultimate bond load of three and five strand-cement specimens with that a single strand-cement specimen.