Fatin Suraya Binti Suhaili
Metric No: BK10160358
Topic: Development of Correlation Charts between Rebound Hammer and Pundit for Concrete Strength in Sabah
Abstract: Concrete strength is influenced by few factors. One of the factors is the type of aggregates used in mixing concrete. Aggregates from Sandstones and Granite are used in this research due to the major usage in Sabah’s construction. Besides, the research on precision evaluation by using the Non-Destructive Test which consist of Rebound Hammer and Portable Ultrasonic Non-destructive Digital Indicating Tester (PUNDIT) by applying statistical analysis. These test applies simple linear and multivariate linear regressions to produce the calibration and its relationship upon Rebound Hammer, PUNDIT, compressive strength and standard cubic. There are three types of concrete mix design which is 20MPa, 30MPa and 40MPa. In this research, there are 126 samples cubes had been prepared from three diferrent locations in Sabah which is Sipitang, Tamparuli and Tawau and tested using NDT method. The formulation produced from the NDT correlation is used to get the estimated strength for the concrete cube. Due to test yielded, it is shows the difference of concrete strength value for each concrete strength especially the aggregate. Thus, the results is then considered deliberately. The combination of Rebound Hammer and PUNDIT gave the approach approximation on concrete strength and reduce the range of magnitude. Therefore, it increase the result reliability. Overall, there are few suggestion in increasing the reliability between the specimens.