Journal
INNOVATIVE INFRASTRUCTURE SOLUTIONS
Volume 6, Issue 2, Pages -Publisher
SPRINGER INTERNATIONAL PUBLISHING AG
DOI: 10.1007/s41062-020-00447-z
Keywords
Silica fume; Cementing efficiency factor; Ultrasonic pulse velocity; Compressive strength
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The study experimentally examined the effects of silica fume replacement level and its cementing efficiency factor on compressive strength and ultrasonic pulse velocity. An exponential relationship between UPV and compressive strength was proposed with a high correlation coefficient, and a statistically significant model was established to study the influence of the variables on UPV results. The proposed new model is valid for predicting the 28-day compressive strength of high-strength concrete in the 40-75 MPa range.
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-2>0.90 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.
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