VOLUME CHANGE OF CLAYS INDUCED BY HEATING AS OBSERVED IN CONSOLIDATION TESTS

Laboratory tests were conducted to investigate the volume change of clays induced by elevated temperature. A coventional consolidometer equipped with a heater and a thermostat was employed for a study on the interaction between clay particles and pore water. Consolidation tests on normally consolida...

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Bibliographic Details
Published inSOILS AND FOUNDATIONS Vol. 33; no. 4; pp. 170 - 183
Main Authors TOWHATA, IKUO, KUNTIWATTANAKU, PISIT, SEKO, ICHIRO, OHISHI, KANTA
Format Journal Article
LanguageEnglish
Published Tokyo The Japanese Geotechnical Society 01.12.1993
Japanese Geotechnical Society
Subjects
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Engineering geology
Exact sciences and technology
temperature effect
sedimentary rocks
thermal effects
pore pressure
permeability
clastic sediments
consolidation
clay
laboratory studies
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ISSN0385-1621
0038-0806
DOI10.3208/sandf1972.33.4_170

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Summary:Laboratory tests were conducted to investigate the volume change of clays induced by elevated temperature. A coventional consolidometer equipped with a heater and a thermostat was employed for a study on the interaction between clay particles and pore water. Consolidation tests on normally consolidated specimens revealed volume contraction upon heating and, when stress application continued further, the samples behaved like overconsolidated clays. Volume contraction occurred similarly, when a sample in the course of secondary compression was heated. Although reloading overconsolidated samples showed similar volume change as well, samples during stress reduction swelled in contrast. Finally, an attempt was made to propose a hypothesis that could explain the mechanism of thermal volume change of clays as observed in the present study.
ISSN:0385-1621
0038-0806
DOI:10.3208/sandf1972.33.4_170