00341169

Component

http://onlinepubs.trb.org...s/trr/1981/790/790-011.pdf

https://scholar.google.co...berg&publication_year=1981

Most expansive soils encountered in engineering problems are at a degree of saturation below 100 percent. Knowledge of the moisture condition of such soils is best obtained by measuring soil suction. Soil suction can be determined routinely by using either the thermocouple psychrometer or filter-paper methods. The volume response can be characterized by obtaining a volume-change measurement along with a determination of suction change. This measure of soil response is called the suction compression index and is a fundatimating the suction compression index from index tests is provided. The soil stiffness, or the reduction in swell behavior caused by loads, must also be accounted for in making heave predictions. A nondimensional equation is presented that was developed by regression techniques from a large number of data found in the technical literature. The equation provides a tool for reducing the volumetric response of expansive soils as applied loads are increased. The use of this information in predicting heave is illustrated.

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

01411607

pp 73-78

1981

Transportation Research Record

0309032040

Print

Figures (5) ; References (34) ; Tables (3)

Compression; Equations; Estimating; Fine grained soils; Forecasting; Loads; Measurement; Percent saturation; Psychrometers; Regression analysis; Soil suction; Stiffness; Swelling soils; Unsaturated soils; Volume changes

Compression index; Heaving

Data and Information Technology; Geotechnology; Highways; I42: Soil Mechanics

TRIS, TRB

Oct 28 1981 12:00AM

• A SHALE RATING SYSTEM AND TENTATIVE APPLICATIONS TO SHALE PERFORMANCE
• DEEP-VERTICAL-FABRIC MOISTURE BARRIERS IN SWELLING SOILS
• DEVELOPMENT OF A LABORATORY COMPACTION-DEGRADATION TEST FOR SHALES
• DYNAMIC RESPONSE OF RAW AND STABILIZED OKLAHOMA SHALES
• LABORATORY STUDIES OF THE STABILIZATION OF NONDURABLE SHALES
• PAVEMENT ROUGHNESS ON EXPANSIVE CLAYS
• SOIL-MOISTURE PROPERTIES OF SUBGRADE SOILS
• SOIL-SUCTION APPROACH FOR EVALUATION OF SWELLING POTENTIAL
• STABILITY OF WASTE-SHALE EMBANKMENTS
• SWELLING SHALE AND COLLAPSING SOIL
• TECHNICAL GUIDELINES FOR THE DESIGN AND CONSTRUCTION OF SHALE EMBANKMENTS
• VOLUME CHANGES IN COMPACTED CLAYS AND SHALES ON SATURATION