Effect of Desiccation Cracking on the Swell and Swell Pressure of Expansive Clay

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Significant effort has been placed on the determination of swelling properties of expansive soils, such as swell pressure and swell potential. However, there are only a limited number of studies of expansive soil response that include the effect of desiccation cracking; most studies and methods of analysis have simply neglected the effect of cracks. At the same time that cracks provide a path for flow of water under positive head, the crack network in an expansive soil functions as swell-Absorbent media (due to open spaces within the soil) which can reduce the total amount of vertical swell that the soil would experience. In this study, a laboratory investigation was carried out to quantitatively evaluate the effect of cracks on swell potential and swelling pressure. The presence of desiccation cracks was found to reduce the amount of swell and also reduce the swell pressure compared to intact, uncracked, specimens. The percentage reduction of swell potential and swell pressure was found to be a function of the volume of cracks and the applied net normal stress.

Original languageEnglish (US)
Title of host publicationGeotechnical and Structural Engineering Congress 2016 - Proceedings of the Joint Geotechnical and Structural Engineering Congress 2016
PublisherAmerican Society of Civil Engineers (ASCE)
Pages2054-2065
Number of pages12
ISBN (Print)9780784479742
StatePublished - 2016
Externally publishedYes
EventJoint Geotechnical and Structural Engineering Congress 2016 - Phoenix, United States
Duration: Feb 14 2016Feb 17 2016

Other

OtherJoint Geotechnical and Structural Engineering Congress 2016
CountryUnited States
CityPhoenix
Period2/14/162/17/16

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ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Civil and Structural Engineering

Cite this

Abbaszadeh, S., Houston, S., & Zapata, C. (2016). Effect of Desiccation Cracking on the Swell and Swell Pressure of Expansive Clay. In Geotechnical and Structural Engineering Congress 2016 - Proceedings of the Joint Geotechnical and Structural Engineering Congress 2016 (pp. 2054-2065). American Society of Civil Engineers (ASCE).