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Title: STABILIZATION OF EXPANSIVE SHALE CLAY BY MOISTURE-DENSITY CONTROL
Accession Number: 00177112
Record Type: Component
Availability: Find a library where document is available Abstract: Stabilization of expansive Pierre shale has been a continuing problem in South Dakota for many years. A procedure has been developed to produce a roadbed with very few differentials that uses special undercutting to a depth of 1.83m (6 ft), replacement of subgrade by selected materials, rigid control of moisture to achieve low density at a high moisture content, and lime treatment in the upper 15.2 cm (6 in) of subgrade. A density of 92 percent of the maximum American Association of State Highway and Transportation Officials T 99 test value and a moisture content of 3 percent above the optimum were set as targets. The high degree of stability of roads constructed by this procedure is shown by the very good roughness-index ratings. The average roughness index, based on a 0 to 5 rating system, is 4.34 for the full length of 209.2 km (130 miles) of surfacing. The projects observed and tested for this study have been inservice from 5 to 8 years.
Supplemental Notes: Publication of this paper sponsored by Compaction and Stabilization Section. 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
Monograph Title: Monograph Accession #: 01411485
Authors: McDonald, E BPagination: pp 11-17
Publication Date: 1977
Serial: ISBN: 0309026709
Media Type: Print
Features: Figures
(8)
; Maps; References
(4)
; Tables
(1)
TRT Terms: Subject Areas: Geotechnology; Highways
Files: TRIS, TRB
Created Date: Jun 28 1978 12:00AM
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