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Transportation Research Record: Journal of the Transportation Research Board

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Research article

First published January 1998

Relating Laboratory and Field Moduli of Texas Base Materials

S. Nazarian, J. Rojas, R. Pezo, D. Yuan, I. Abdallah, and T. ScullionView all authors and affiliations

Abstract

Resilient modulus of base is an important parameter in the AASHTO pavement design method. However, the manner to determine this parameter is not well defined. Recent efforts in combining the resilient moduli from laboratory testing with those obtained in the field using nondestructive testing devices are presented. Laboratory tests were carried out in two stages. In the first stage, virgin materials from the quarry compacted to optimum moisture content were tested. In the second stage, similar base materials were retrieved from in-service roads. Specimens were prepared and tested at the corresponding field densities and moisture contents. Nondestructive tests were performed with the Falling Weight Deflectometer and the Seismic Pavement Analyzer. Based on tests on 10 different base materials from different parts of Texas, it was concluded that it may be difficult to directly compare moduli from laboratory and field tests; however, they can be combined for effective pavement design.

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Published In

Transportation Research Record

Volume 1639, Issue 1

Pages: 1 - 11

Article first published: January 1998

Issue published: January 1998

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