Evaluation of Collapse Potential Investigated from Different Collapsible Soils

  • Qasim A. J. Al-Obaidi
  • Saad Farhan Ibrahim
  • Tom Schanz
Part of the Springer Series in Geomechanics and Geoengineering book series (SSGG)


Collapsible soils are considered as one of the problematic soils, and widely distributed in North America, Europe, Russia and Asia. They show low dry density and moisture content in all testing schedule due to presence of cementation bonds or loess structure especially at unsaturated state in arid or semi-arid regions. Moreover large deformation, rapid settlement and high decrease in void ratio of a meta-stable soil structure occurred during wetting and loading. Two types of unsaturated collapsible soils are used in this study from different area in the world. Collapse potential(Ic) and collapse index (Ie) magnitude are determined according ASTM (D5333-03) by using the conventional Oedometer device in a constant temperature and humidity environmental at different stress level. It was noted that the value of collapse potential (Ic) affected by the rate of secondary consolidation (Creep) and time of wetting. It shows high values when flooding the specimens by water during primary consolidation. It is concluded that there is an increases in collapsibility due to removal of bonding between cementing particles upon wetting due to stress release and leaching of soil during water infiltration leading to softening due to rearrangement of soil particles.


Void Ratio Vertical Stress Loess Soil Collapse Potential Gypsum Content 
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  1. Al-Aithawi, A.H.: Time-Dependent Deformation of a Gypseous Silty Soil, MSc.Thesis, Civil Engineering Department, University of Baghdad, Iraq (1990)Google Scholar
  2. Al- Mohmmadi, N.M., Nashat, I.H., Bako, G.Y.: Compressibility and Collapse of Gypseous Soils. In: Proc. 6th Asian Conf. on Soil Mechanics, Tokyo (1987)Google Scholar
  3. Al-Mufty, A.A., Nashat, I.H.: Gypsum Content Determination in Gypseous Soils and Rocks. In: 3rd Int. Jordanian Conference on Mining, pp. 500–506 (2000)Google Scholar
  4. ASTM D5333, Standard Test Method for Measurement of Collapse Potential of Soils (2003)Google Scholar
  5. Barden, L., McGown, A., Collins, K.: The collapse mechanism in partly saturated soil. Eng. Geol. 7, 49–60 (1973)CrossRefGoogle Scholar
  6. Ng, C.W.W., Bruce, M.: Advanced Unsaturated Soil Mechanics and Engineering. Taylor and Francis Group, London (2007)Google Scholar
  7. DIN 38414-S4, German standard methods for the examination of water, waste water and sludge; sludge and sediments (group S); determination of leachability by water (S 4) (Publication date: October 1984)Google Scholar
  8. Fattah, M.Y., Al-Shakarchi, Y.J., Al-Numani, H.N.: Long–Term Deformation of Some Gypseous Soils. Engineering and Technology Journal 26(12) (2008)Google Scholar
  9. Houston, S.L., Houston, W.N., Zapata, C.E., Lawrence, C.: Geotechnical and Geological Engineering 19, 333–355 (2001)Google Scholar
  10. Jennings, J.E., Knight, K.: A Guide to Construction on or with Materials Exhibiting Additional settlement Due to Collapse of Grain structure. In: Proceeding of 6th Regional Conference for Africa on Soil Mechanics and Foundation Engineering, Durban, South Africa, pp. 99–105 (1975)Google Scholar
  11. Nashat, I.H.: Engineering Characteristics of some Gypseous Soils in Iraq. PhD Thesis, Civil Eng. Dep., University of Baghdad (1990)Google Scholar

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© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Qasim A. J. Al-Obaidi
    • 1
  • Saad Farhan Ibrahim
    • 2
  • Tom Schanz
    • 1
  1. 1.Soil and Rock Mechanics Department, Civil and Environmental Engineering FacultyRuhr University BochumBochumGermany
  2. 2.Civil, Environmental and Geodetic Engineering DepartmentOhio State UniversityColumbusUSA

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