Method for the elimination of adverse swelling of sulfate bearing soils
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United States of America
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Jan 23, 2020
app pub date -
Jul 23, 2018
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Jul 23, 2018
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Abstract
A method is shown for reducing the adverse swelling action of sulfates in clay bearing soils during lime stabilization by treating soils having high sulfate content with a soluble aluminum compound that can react with the sulfate ions in the soil to form ettringite or other swelling species during the initial reaction with lime stabilization prior to compaction and paving of the lime treated soil. The amount of soluble aluminum ions added to the soil is determined by the concentration of sulfate in the soil and the other soil parameters such as the soils PI, clay type, etc.
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