Fracture Surface Characterization of Concreteby M. A. Issa, Univ of Illinois at Chicago, Chicago, United States,
A. M. Hammad, Univ of Illinois at Chicago, Chicago, United States,
A. Chudnovsky, Univ of Illinois at Chicago, Chicago, United States,
Abstract: The objective of this paper is to characterize fracture surfaces of concrete, with varying maximum aggregate sizes dmax, by utilizing the concept of fractal geometry. Three different aggregate sizes (dmax = 37.5 mm, 18.9 mm and 4.7 mm) of crushed limestone were used. A promising new non-destructive approach to evaluate fractal dimension, as a measure of fracture surface roughness, is presented. The fractal dimension D of the fracture surface was shown to increase monotonically with the increase in dmax. Fractal dimension D of the fracture surfaces was found in a range of 2.10-2.22.
Subject Headings: Cracking | Fractals | Concrete | Aggregates | Geometrics | Limestone | Hydraulic roughness | Materials characterization
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