Compressive strength prediction model of high‑strength concrete with silica fume by destructive and non‑destructive technique

摘要

The study proposes a new model for estimating the compressive strength of high-strength concrete using destructive and non-destructive testing. The effect of silica fume replacement level and its cementing efficiency factor on compressive strength and ultrasonic pulse velocity (UPV) were experimentally examined. In the present work, the cementing efficiency factor (k) for silica fume at different percentage replacement level has been assumed, and at the constant water-to-binder ratio, the compressive strength has been obtained. An exponential relationship is proposed between UPV and compressive strength with a high correlation coefficient. A statistically noteworthy model with a high correlation coefficient R-20.90 is established to study the influence of the variables (%SF and k) on UPV results. Finally, the two proposed models were amalgamated to develop a new model to predict the 28-day compressive strength of high-strength concrete. The validity of the model has been verified with the results obtained by different researchers on different types of specimens. The proposed new model is for the strength range of the 40-75 MPa.