TRB Pubsindex
Text Size:
x

« Prev Next »

Return to Results | New Search

Bookmark and Share

Title:

TEMPERATURE EFFECT ON WATER RETENTION AND SWELLING PRESSURE OF CLAY SOILS

Accession Number:

00237760

Record Type:

Component

Abstract:

CLAY-WATER INTERACTION IN SOIL SYSTEMS WHERE SOLUTE EFFECTS ARE NEGLIGIBLE IS MEASURED BY THE MATRIC POTENTIAL. THE TWO FORCES CONTRIBUTING TO THE MATRIC POTENTIAL ARE THE SWELLING AND CAPILLARY FORCES. THEORETICAL EXPECTATION AND AVAILABLE EXPERIMENTAL EVIDENCE INDICATE THAT TEMPERATURE CHANGES INFLUENCE THE TWO COMPONENTS DIFFERENTLY. WHILE AN EXACT SEPARATION OF FORCES CANNOT BE MADE BECAUSE THEY MAY NOT NECESSARILY BE COMPLETELY INDEPENDENT, AN ASSESSMENT OF THE SPECIFIC CONTRIBUTION OF EACH CAN BE ATTEMPTED THROUGH CONTROLLED EXPERIMENTS. MEASUREMENTS WERE MADE AT 10, 25, AND 45 C OF SOIL SUCTION ON PLASTER OF PARIS SAMPLES WITH DIFFERENT VOID-SIZE DISTRIBUTION, AND OF SOIL SUCTION AND SWELLING PRESSURE ON KAOLINITE-GLASS BEAD MIXTURES. SOIL SUCTION WAS MEASURED ON THE ADSORPTION CYCLE. THE CLAY-GLASS BEAD SAMPLES WERE PRECOMPRESSED TO 10 BAR AND WERE THEN EITHER ALLOWED TO SWELL (REBOUND) UNDER DECREASING LOAD, OR WERE TRANSFERRED TO A PRESSURE PLATE APPARATUS AND ALLOWED TO TAKE UP WATER UNDER DECREASING AIR PRESSURE. THE RESULTS SHOW THAT IN THE SWELLING PRESSURE TESTS, WHERE COMPLETE SATURATION EXISTS, INCREASED TEMPERATURES RESULTED IN SLIGHTLY INCREASED WATER CONTENTS FOR THE SAME SWELLING PRESSURE. THIS IS CONSISTENT WITH QUALITATIVE PREDICTIONS BASED ON THE THEORY OF SWELLING DUE TO INTERACTION OF DIFFUSE ION-LAYERS. FOR SOIL SUCTION MEASUREMENTS, WHERE UNSATURATION OCCURS, INCREASED TEMPERATURES RESULTED IN DECREASED WATER CONTENTS FOR THE SAME SOIL WATER POTENTIAL. THIS WOULD RESULT FROM DECREASED VALUES OF SURFACE TENSION WITH THE TEMPERATURE INCREASES. THIS IS DEMONSTRATED MORE CLEARLY WITH THE PLASTER OF PARIS SAMPLES WHERE THE CAPILLARY FORCE IS THE ONLY COMPONENT OF MATRIC POTENTIAL. THESE MEASUREMENTS OF TEMPERATURE EFFECTS ARE MORE USEFUL BECAUSE BOTH SWELLING AND WATER UPTAKE ARE MEASURED ON IDENTICAL SAMPLES. THE VARIOUS AND SWELLING AS AFFECTED BY TEMPERATURE. /AUTHOR/

Supplemental Notes:

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 Accession #:

01410773

Corporate Authors:

Highway Research Board (HRB)

Washington, DC

Authors:

YONG, R N
Chang, R K
Warkentin, B P

Pagination:

pp 132-137

Publication Date:

1969

Serial:

Highway Research Board Special Report

Issue Number: 103
Publisher: Highway Research Board

Conference:

Proceedings of an International Conference Held at Washington, D.C., January 16 1969 With the Support of the National Science Foundation

Location: Washington DC, United States
Date: 1969-1-16 to 1969-1-16
Sponsors: National Research Council; National Science Foundation

Media Type:

Digital/other

Features:

Figures (4) ; References (6)

Old TRIS Terms:

Subject Areas:

Geotechnology; Highways

Files:

TRIS, TRB, ATRI

Created Date:

Aug 25 1994 12:00AM

More Articles from this Serial Issue: