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Proceedings Paper

Optical inspection of granite fracture surfaces
Author(s): Manuel F. M. Costa; G. Vasconcelos; Paulo B. Lourenço
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Paper Abstract

The study of the conditions for a facture to occur and its consequences is of utmost importance in several different fields. In civil engineering and construction granites are extensively used. Recent works confirmed a correlation between roughness of the fracture surface and characteristic mechanical properties of the fracture process for distinct types of granites. The relief of the fracture surfaces resulting from direct tensile tests conducted on different types of granites was characterized 3D and by calculation standard parameters, as the average roughness and root-mean-square roughness. The 3D data was acquired using the MICROTOP.03.MFC laser triangulation based microtopographer adapted according to the characteristics of this type of samples. A scattered linear correlation between fracture energy and the average (micro) roughness was found. Additionally, it was found that microstructural aspects, like planar anisotropy and grain size, as well as the weathering state, influence the fracture surface relief. In this communication we will present and discuss the distinct tri-dimensional characteristics of the fracture surface of granites, with diverse petrographic characteristics, and the metrological procedure employed in this study.

Paper Details

Date Published:
PDF: 12 pages
Proc. SPIE 7432, Optical Inspection and Metrology for Non-Optics Industries, 74320G; doi: 10.1117/12.825516
Show Author Affiliations
Manuel F. M. Costa, Univ. do Minho (Portugal)
G. Vasconcelos, Univ. do Minho (Portugal)
Paulo B. Lourenço, Univ. do Minho (Portugal)

Published in SPIE Proceedings Vol. 7432:
Optical Inspection and Metrology for Non-Optics Industries
Peisen S. Huang; Toru Yoshizawa; Kevin G. Harding, Editor(s)

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