Empirical Relationship between the Impact Energy and Compressive Strength for Fiber Reinforced Concrete

摘要

In this study, an empirical relationship between the impact energy and compressive strength is developed using regression analysis. For this, simple, practical, and economical drop weight test was performed on fiber reinforced concrete which was based on the testing procedure recommended by ACI committee 544. Crimped steel fiber of 50 mm length and an aspect ratio of 50 was used as the reinforcing material in four different volume fractions such as 0%, 0.5%, 1.0% and 1.5% with water cement ratio of 0.42. The test results indicated that increasing volume fraction of fiber increased the impact resistance of concrete speeimen. It is also found that the empirical relationship obtained from the regression analysis is accurate and preferable to evaluate the impact energy by using compressive strength of fiber reinforced concrete thus eliminating the drop weight test.