The effect of concrete moisture on compressive strength, ultrasound pulse velocity, and surface hardness values

Concrete moisture; In this study, 63 specimens of 15x15x15 cm cube were prepared in order to investigate the effect of compressive strength, ultrasound velocity and surface hardness. In order to determine the effect of different water content values on the ultrasound pulse velocity, Schmidt hammer and compressive strength, the drying oven process was applied to the prepared concrete samples and they were subjected to experiments by removing them from the drying oven at regular intervals. 7, 28 and 90 day tests were applied to the same number of concrete specimens prepared in the same way. The results obtained were evaluated separately and regression analysis was performed. Various formulas and graphs were obtained as a result of regression analysis. The effect of the pumice and zeolite, which are replaced for concrete mixture, on the high water content is clearly visible, the ultrasound pulse velocıty and srtength increased and the water content gradually decreased at the end of the drying periods