Fracture Surface Characterization of Concrete

by 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,



Document Type: Proceeding Paper

Part of: Engineering Mechanics

Abstract:

The objective of this paper is to characterize fracture surfaces of concrete, with varying maximum aggregate sizes d_max, by utilizing the concept of fractal geometry. Three different aggregate sizes (d_max = 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 d_max. Fractal dimension D of the fracture surfaces was found in a range of 2.10-2.22.

Subject Headings: Cracking | Fractals | Concrete | Aggregates | Nondestructive tests | Materials characterization | Limestone

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