What is it about?
The ratio between the compression index to the swelling index is correlated to the swelling pressure. Data collected from six countries for 209 intact soil specimens enabled to distinguish between expansive to highly expansive soils, moderately expansive soils and non expansive soils when the Cc/Cs ratio increases from the interval [1 to 10], [10 to 15] and greater than 15, respectively. The added value of this work is the first correlation established between the Cc/Cs ratio and the swelling pressure for 168 Tunisian soils. From the oedometer curve, it is easy to distinguish between an expansive and non-expansive soils. The main data is the ratio between the compression index and the swelling one. This ratio is correlated with the swelling pressure.
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Why is it important?
The proposed charaterization method onl considers the oedometer parameters. Whilts existing ones consider parameters frol differents identification tests.
Perspectives
The proposed correlation for Tunisian soils will be extended to Algerian and Moroccan soils. The awaited correlation will e compared between each others.
Professor Mounir Bouassida
University of Tunis El Manar
Read the Original
This page is a summary of: Expansive soil characterization: CC/CS ratio method, Geodata and AI, September 2025, Elsevier,
DOI: 10.1016/j.geoai.2025.100039.
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