Journal
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
Volume 42, Issue 4, Pages 508-520Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijrmms.2005.01.005
Keywords
thermal loading; porous media; permeability; poro-mechanical properties; microscopic observations
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This experimental work aims at studying the influence of temperature on mechanical behaviour and poro-mechanical properties of an oolitic limestone from Anstrude, France. This program follows a previous hydraulic and poro-mechanical study on the same intact material-i.e. which had not been heated. Close agreement was found between direct measurements of poro-mechanical properties and their theoretical values. The Anstrude limestone has been oven-heatedat two temperature levels ( 150 or 250 degrees C) in order to evaluate possible thermal effects such as micro-cracking. Macroscopic properties such as porosity and permeability do not show notable differences, and no visible cracks are observed with microscopic observations. However, strength limit and poro-mechanical properties (measured with a non-nil pore pressure) vary after thermal treatment. This may be evidence that micro-cracking occurs at a lower scale than that used for the microscopic observations, and is able to influence the undrained behaviour of the material. (c) 2005 Elsevier Ltd. All rights reserved.
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