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ASTM D4829 2011 Edition, November 1, 2011
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Standard Test Method for Expansion Index of Soils
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This test method allows for determination of expansion potential of compacted soils when inundated with distilled water.2

This test method provides a simple yet sensitive method for determination of expansion potential of compacted soils for practical engineering applications using an index parameter.

The values stated in SI units are to be regarded as the standard. The values stated in inch-pound units are approximate.

All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D 6026.

The method used to specify how data are collected, calculated, or recorded in this standard is not directly related to the accuracy to which the data can be applied in design or other uses, or both. How one applies the results obtained using this standard is beyond its scope.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2 Refer to Anderson, J. N., and Lade, P. V., "The Expansion Index Test," Geotechnical Testing Journal, Vol 4, No. 2, ASTM, 1981, pp. 58–67.

*A Summary of Changes section appears at the end of this standard.