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A new expansive soil classification approach is proposed using internal cation exchange capacity as an index variable and shown to have improved accuracy compared to existing approaches.
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This page is a summary of: Measurement of External and Internal Cation Exchange Capacity and Implications to Expansive Soil Classification, Geotechnical Testing Journal, March 2025, ASTM International,
DOI: 10.1520/gtj20240085.
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