Field and Laboratory Determination of Granular Subgrade Moduli
Publication: Journal of Performance of Constructed Facilities
Volume 16, Issue 4
Abstract
This paper presents a comparison study of the experimental results from the falling weight deflectometer (FWD) test, field rigid plate bearing load test, and laboratory resilient modulus test on granular subgrade materials in flexible pavements. The results showed that the average laboratory resilient moduli at optimum compacted conditions were 1.1 times higher than the average laboratory determined resilient moduli at in situ conditions. The FWD back-calculated moduli were about 1.6 times higher than the laboratory resilient moduli for the granular materials. The average laboratory determined maximum dry density was slightly higher than the average field measured in situ dry density. A hyperbolic model was proposed to represent the relationship of the load-deformation curve obtained from the field plate bearing load test. No significant relationship was found between the laboratory resilient modulus and the modulus of elasticity from the field plate bearing tests.
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Information & Authors
Information
Published In
Journal of Performance of Constructed Facilities
Volume 16 • Issue 4 • November 2002
Pages: 149 - 159
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Sep 17, 2001
Accepted: May 1, 2002
Published online: Oct 15, 2002
Published in print: Nov 2002
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