Research Article
Nov 1974
Significance of Variably Confined Triaxial Testing
Publication: Transportation Engineering Journal of ASCE
Volume 100, Issue 4
Abstract
Two types of tests were performed in an earlier study—the constant confining pressure (CCP) test, in which the chamber pressure is held constant during application of the repeated axial stress and the variable confining pressure test, in which the chamber pressure is applied dynamically and varied simultaneously with the axial stress. A sensitivity analysis, consisting of finite element analyses of typical flexible pavement sections, is examined. The granular material resilient parameters are varied over a wide range of laboratory-derived values. The importance of accounting for the stress-dependent properties of paving materials in pavement structural analysis is demonstrated by the drastic changes in stress and deflection distribution effected by the inclusion of stabilized layers beneath unbound granular base courses. The significance of differences in material parameters derived from the two types of triaxial tests are assessed, and it is shown that the less complicated CCP test yields sufficiently accurate results to warrant it continued use as a means of characterizing granular pavement materials.
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Published In
Transportation Engineering Journal of ASCE
Volume 100 • Issue 4 • November 1974
Pages: 827 - 843
Copyright
© 1974 American Society of Civil Engineers.
History
Published in print: Nov 1974
Published online: Feb 5, 2021
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Authors
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John J. Allen, AM.ASCE
Captain, U.S. Air Force, and Instr., Dept. of Civ. Engrg., Engrg. Mechanics and Materials, U.S. Air Force Academy, Colo.
Marshall R. Thompson, M.ASCE
Prof. of Civ. Engrg., Univ. of Illinois at Urbana-Champaign, Urbana, Ill.
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.