00376537

Component

http://onlinepubs.trb.org...s/trr/1983/898/898-020.pdf

https://scholar.google.co...dson&publication_year=1983

The resilient modulus is a necessary factor for the mechanistic analysis of pavement structures, but it is also relatively expensive to measure. Material characterization is, however, a routine operation during the design and construction of a road. The aim of this study was to develop prediction models for estimating the resilient modulus from standard laboratory test results. Data collected during a research project conducted in Brazil by the Brazillian government and the United Nations Development Program were used as a primary source. The models were tested and extended on data collected by Austin Research Engineers in the United States, and the revised models were evaluated by using published data from different parts of the world. Resilient moduli measured on the Brazillian samples (lateritic materials) were very much higher than those measured on samples (clays) from the United States. Even among the Brazillian samples, sandy materials, thought to indicate an advanced degree of laterization, had a higher modulus than clayey materials. Moisture content was not found to influence the modulus of the Braxillian materials, but it had a significant effect on the U.S. samples. Comparison of values predicted from the models with measured values obtained in the United State suggests that although the models were developed on undisturbed materials, the results may also be applicable to laboratory-compacted samples. The moisture content should, however, be below optimum, since a high moisture content can have an unpredictable influence on the results. Comparison of the predicted resilient modulus with untrafficked and trafficked undisturbed roadbed materials used in the road test conducted by the American Association of State Highway Officials (AASHO) showed that there may be a traffic influence. (Author)

Publication of this paper sponsored by Committee on Low-Volume Roads. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

00380954

N908

pp 133-140

1983

Transportation Research Record

Third International Conference on Low-Volume Roads

0309035112

Print

Figures (5) ; References (14) ; Tables (1)

Alternatives analysis; Clay; Forecasting; Lateritic soils; Low volume roads; Mathematical models; Modulus of resilience; Pavement design; Properties of materials; Resilience (Materials); Sandy soils; Soils; Tropics

Soil properties

Design; Geotechnology; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways

TRIS, TRB

Aug 30 1983 12:00AM