期刊
CEMENT AND CONCRETE RESEARCH
卷 37, 期 5, 页码 703-713出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cemconres.2007.02.008
关键词
mortar; compression; damage; fracture; mercury porosimetry; acoustic emission; X-ray tomography
This paper explores the use of acoustic emission (AE) and X-ray tomography to identify the mechanisms of damage and the fracture process during compressive loading on concrete specimens. Three-dimensional (3D) X-ray tomography image analysis was used to observe defects of virgin mortar specimen under different compressive loads. Cumulative AE events were used to evaluate damage process in real time according to the sand/cement ratio. This work shows that AE and X-ray tomography are complementary nondestructive/ methods to measure, characterise and locate damage sites in mortar. The effect of the sand proportion on damage and fracture behaviour is studied, in relation with the microstructure of the material. (C) 2007 Elsevier Ltd. All rights reserved.
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