期刊
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GROUND IMPROVEMENT
卷 167, 期 3, 页码 162-172出版社
ICE PUBLISHING
DOI: 10.1680/grim.13.00008
关键词
geotechnical engineering; materials technology; pavement design
资金
- NSF [0100255, 1031214]
- Texas Department of Transportation
- City of Arlington - Public Works Department, Arlington, Texas, USA
- US Army Corps of Engineers
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1031214] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [0100255] Funding Source: National Science Foundation
Stabilisation of sulfate-bearing soils has proven to be a challenging engineering problem for the pavement and geotechnical engineering community. Pavement distress caused by the heaving of sulfate soils often necessitates pavement rehabilitation and frequent road closures. Although the current literature provides a few reasons for sulfate heaving, there are still remaining issues with respect to normalisation of sulfate levels at which this heave will occur in the field. This paper presents sulfate heave issues, soluble sulfate measurement techniques for soils and various factors that complicate the establishment of threshold sulfate levels. Sulfate heave mechanisms by crystal growth and ettringite hydration are explained. Then an overview is provided of various soluble sulfate measurement techniques; a couple of case histories of sulfate-induced failures are also included. A comprehensive summary is given of various alternative treatments used in an attempt to stabilise sulfate soils. In conclusion, a few other issues related to this heaving and ongoing research developments to address these issues are briefly mentioned.
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