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Title:

DEEP-VERTICAL-FABRIC MOISTURE BARRIERS IN SWELLING SOILS

Accession Number:

00341171

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/issn/03611981

Abstract:

A deep-vertical-fabric moisture barrier has been placed on two Texas highways that have been severely damaged by swelling-soil subgrade. Previous testing of a ponding section has indicated the depth of the zone of activity. By developing additional mechanisms and making maximum use of prior developments, the Texas State Department of Highways and Public Transportation is using fabric on two San Antonio freeway rehabilitation projects: an 0.8-km (0.5-mile) test section on Interstate Highway Loop 410 and a 3.2-km (2-mile) section of |-37. DuPont EVA-coated Typar T063 fabric has been placed 2.4 m (8 ft) into the zone of activity. The goal is to minimize destructive pavement movements over expansive clays by minimizing moisture change. Testing includes moisture-sensor readings, profilometer measurements computer converted to serviceability indexes, photologging, elevation readings, and pavement surface inventories. There are no reportable results for the recently completed |-37 project. However, after a two-year testing span on Loop 410, profilometer serviceability indexes and other favorable measurements indicate a better riding surface on the fabric-protected lanes than on the adjacent control section. The results are viewed with guared optimism.

Supplemental Notes:

Publication of this paper sponsored by Committee on Environmental Factors Except Frost. 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:

Shales and swelling soils

Monograph Accession #:

01411607

Authors:

Steinberg, Malcolm L

Pagination:

pp 87-94

Publication Date:

1981

Serial:

Transportation Research Record

Issue Number: 790
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309032040

Media Type:

Print

Features:

Figures (9) ; Maps (4) ; References (10) ; Tables (4)

Uncontrolled Terms:

Serviceability Index

Old TRIS Terms:

Subject Areas:

Design; Geotechnology; Highways; I42: Soil Mechanics

Files:

TRIS, TRB

Created Date:

Oct 28 1981 12:00AM

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