00473123

Component

http://onlinepubs.trb.org...1987/1106v1/1106v1-034.pdf

https://scholar.google.co...dson&publication_year=1987

The major findings of the study "Development of Preliminary Guidelines for Material Requirements of Low-Volume Roads" are summarized in this paper. The diminishing aggregate supply has forced many highway engineers to be more conservative in their use of conventional aggregates. As a result, the use of marginal aggregates for low-volume road construction is seriously considered to be a possible alternative. This study was undertaken to investigate the relationship between aggregate properties and roadway performance to determine whether traditional requirements for these properties could be revised. The performance of low-volume roads is considered to be influenced by three major elements: environmental conditions, material properties, and service levels. Moisture and temperature were identified as the main environmental factors, and plasticity, gradation, and degradation were selected as the most significant material properties. The more common failure types (indicators of performance) for low-volume roads and factors that affect performance are also presented. Preliminary guidelines were developed for relaxing the standard specification requirements of aggregates for low-volume roads. To demonstrate their applicability, 12 reportedly marginal materials from the Globetrotter study were evaluated. Throughout the report, the need for a monitoring system to collect performance data for nationwide use is strongly emphasized.

This paper appeared in Transportation Research Record N1106, Fourth International Conference on Low-Volume Roads, Volume 1. 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

00490258

pp 260-268

1987-8

Transportation Research Record

International Conference on Low Volume Roads, 4th, 1987, Ithaca, New York, USA

0309044545

Print

Figures (1) ; Maps (3) ; References (16) ; Tables (4)

Aggregate gradation; Aggregates; Aggregates by gradation; Environmental impacts; Guidelines; Level of service; Low volume roads; Materials; Moisture content; Performance; Plasticity; Specifications; Temperature

Degradation; Marginal aggregates

Design; Environment; Geotechnology; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I36: Aggregates

TRIS, TRB

Sep 30 1987 12:00AM