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ATBU Journal of Environmental Technology

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Relationship between ultrasonic pulse velocity test result and concrete cube strength

D Dahiru

Abstract


This paper presents the findings of a study on the relationship between Ultrasonic Pulse Velocity (UPV) and Concrete Cube Strength; in three distinct stages. First, a preliminary investigation of the various properties of the materials used for the production of concrete was undertaken. This was followed by trial mix using a nominal mix of 1:2:4, water – cement, W/C, ratios of 0.4, 0.5 and 0.6; along with two different consolidation methods – manual and machine vibrated. Based on the result of trial mix, W/C ratio of 0.5 was used to prepare and cure 150mm x 150mm x 150mm concrete cubes. The third stage subjected the samples to UPV and destructive tests at the end of the following curing days: 1, 3, 7, 14, 21, 28, 56 and 90 days. Ultrasonic Pulse Velocity test result showed an inverse relationship (of -0.935) with the crushed concrete compressive strength. Correlation test, multiple regression analysis, graphs and visual inspection were used to analyze the results. The conclusion drawn is that there exists a relationship between UPV test results and compressive strength. It is expressed as follows: y = 151- 3.2x1; where y and x1 are compressive strength and UPV test results respectively. Hence it is recommended that the above formula can be used in converting the UPV test results to compressive strength

Keywords: Concrete, cube strength, non-destructive test, relationship, ultrasonic pulse velocity




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