United States Department of Transportation
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Guidelines for Chemically Stabilizing Problematic Soils: Final Report
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2020-04-01
[PDF-3.00 MB]
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Edition:Final Report (April, 2017-April, 2020)
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Abstract:The main goal of this project was to establish protocols for conducting efficient chemical stabilization design for problematic soils with and without soluble sulfates within the state of Montana. A major portion of chemical stabilization protocols involves the selection of type and amount of the additives. The proper selection of type and concentration of additive for a given soil should consider, the complex interactions between the mineralogy of the materials and additives, the presence or absence of moisture, and the method of construction and curing. Keeping this in mind several tasks were undertaken to meet the project goal. The study focused on lime and cement as additives and six different soils with varying geology were selected from different parts of Montana. This report contains an overview of the tasks, followed by a summary of the results obtained, and a discussion on the results. The results indicate that chemical stabilization can be a viable alternative for all soils tested in this research especially for short-term applications. However, for long term applications, only three out of six soils showed satisfactory performance.
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