Abstract
Abstract Concrete structures consist of cracks even under service loads. The presence of micro-cracks and other flaws such as pores and voids act as potential sources for crack propagation leading to fracture under external loadings. Irregularities produced during the fracturing process in concrete are manifested on the fracture surface, characterizing it as fractal. Therefore, the investigation and quantification of the fractal pattern exhibited by fracture surfaces have become a focal point of research in recent years. In this work, beam specimens made with four different concrete mixes underwent a three-point bending test in order to determine a correlation between the fracture energy and mechanical characteristics of concrete. Concrete’s mechanical characteristics and fracture energy are discovered to be positively correlated. The fractal analysis is done using an LVDT instrument. Using a program written in MATLAB code, the fractured surface is regenerated with measured undulations. Concrete’s flexural strength and fracture energy are then connected with the fractal dimension value that was found. In conclusion, it was observed that a strong correlation exists between the fractal dimension value and fracture energy.
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