Evaluation of Residual Mechanical Properties of Non-sintered Hwangto Concrete Exposed to High Temperatures Using Ultrasonic Pulse Velocity Method

Abstract

In this study, the ultrasonic pulse velocity (UPV) method was used to evaluate the residual mechanical properties of non-sintered Hwangto concrete exposed to high temperatures. The effect of the replacement ratio of non-sintered Hwangto concrete (0 15, and 30%) on the residual mechanical properties was evaluated, with compressive strength and UPV set as the evaluation parameters. The experimental results showed that the residual mechanical properties of the specimens exhibited similar trends with increasing temperature, regardless of the non-sintered Hwangto concrete replacement percentage. Regression analysis revealed a strong linear relation between the variables. An error test indicated that the influence on the target strength was the highest, and analysis with the existing prediction model suggested the need for a prediction model specifically for non-sintered Hwangto concrete.