Swelling Mechanism of Expansive Soils in Hexu and Hean Expressways


During recent few years, many subgrades and cuttings of Hexu and Hean Expressways were badly damaged due to the swelling action of expansive soils. The purpose of our study was to investigate the swelling mechanism of these expansive soils. A series of tests were carried out, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), cation exchange capacity (CEC), as well as physical and mechanical tests, in this testing program. Results indicated that the swelling behavior of expansive soil was primarily influenced by clay mineral composition, the natural dispersible degree of soil particles, CEC, and microstructure characteristics, etc. Study results suggest that to better understand the swelling mechanism of expansive soil, more attentions should be paid to these factors, particularly mineral composition and soil structure type.

  • Abstract
  • Introduction
  • Methods
  • Results
  • Discussion
  • Conclusion
  • Acknowledgments
  • References
Topics: Highways, Soil

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In