Location

Arlington, Virginia

Session Start Date

8-11-2008

Session End Date

8-16-2008

Abstract

Sabkha is one of the many types of evaporate regimes that exist around the globe. In addition to being distributed along the coasts, sabkha soils cover a number of continental depressions, both of which usually form in hot, arid climates and are associated with shallow groundwater tables. Sabkhas are well distributed locally and over the whole world. Sabkhas are characterized as being salt-full and water-sensitive soils. The presence of soluble salts makes the use of distilled water in testing these soils, as recommended by ASTM, etc., inappropriate. Further, sabkha soils possess low strength at their natural condition. Therefore, it would be imperative to stabilize the sabkha soil at the actual moisture content in the field. In this paper, the author reviews the modifications on some ASTM standard test methods in order to properly assess the geotechnical properties of sabkha soils. Moreover, two stabilizing programs of sabkha soil using lime and cement at various dosages are presented. The first program was concerned with stabilizing the sabkha at the optimum moisture content, while the second study was devoted to stabilize the sabkha at high (i.e., natural) moisture contents. The results of these studies indicate that sabkha (as a typical evaporitic soil) can be practically used by the construction industry in many field applications.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Sixth Conference

Publisher

Missouri University of Science and Technology

Publication Date

8-11-2008

Document Version

Final Version

Rights

© 2008 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Aug 11th, 12:00 AM Aug 16th, 12:00 AM

Testing and Stabilization of Saline Sabkha Soils: A Review

Arlington, Virginia

Sabkha is one of the many types of evaporate regimes that exist around the globe. In addition to being distributed along the coasts, sabkha soils cover a number of continental depressions, both of which usually form in hot, arid climates and are associated with shallow groundwater tables. Sabkhas are well distributed locally and over the whole world. Sabkhas are characterized as being salt-full and water-sensitive soils. The presence of soluble salts makes the use of distilled water in testing these soils, as recommended by ASTM, etc., inappropriate. Further, sabkha soils possess low strength at their natural condition. Therefore, it would be imperative to stabilize the sabkha soil at the actual moisture content in the field. In this paper, the author reviews the modifications on some ASTM standard test methods in order to properly assess the geotechnical properties of sabkha soils. Moreover, two stabilizing programs of sabkha soil using lime and cement at various dosages are presented. The first program was concerned with stabilizing the sabkha at the optimum moisture content, while the second study was devoted to stabilize the sabkha at high (i.e., natural) moisture contents. The results of these studies indicate that sabkha (as a typical evaporitic soil) can be practically used by the construction industry in many field applications.