Chabrat, N.; Cuisinier, O.; Masrouri, F. In Situ Alteration of the Hydro-Mechanical Behaviour of a Compacted Stabilised Expansive Soil. Geotechnics2023, 3, 921-936.
Chabrat, N.; Cuisinier, O.; Masrouri, F. In Situ Alteration of the Hydro-Mechanical Behaviour of a Compacted Stabilised Expansive Soil. Geotechnics 2023, 3, 921-936.
Chabrat, N.; Cuisinier, O.; Masrouri, F. In Situ Alteration of the Hydro-Mechanical Behaviour of a Compacted Stabilised Expansive Soil. Geotechnics2023, 3, 921-936.
Chabrat, N.; Cuisinier, O.; Masrouri, F. In Situ Alteration of the Hydro-Mechanical Behaviour of a Compacted Stabilised Expansive Soil. Geotechnics 2023, 3, 921-936.
Abstract
This paper assesses the performance of an embankment constructed in 2010 with a stabilised expansive soil. Two types of treatment were employed at construction time: 4% lime and a mix of 2% lime and 3% cement. A sampling campaign was carried out in 2021 to evaluate the long-term performance of the stabilised soil properties. To assess the compressibility of the soil, oedometer tests were carried out on samples from different parts of the embankment. The results were compared to the compression curve of the untreated soil, also sampled in the same embankment. Complementary shrinkage tests were performed to investigate the effect of the treatment on swelling and shrinkage. The obtained results showed that the behaviour of the material from the outer part was similar to the mechanical performance of the untreated soil, demonstrating strong alteration in the effect of both treatments over time. This alteration was noticeable to a distance of approximately two metres from the external surface. Beyond this distance, the performance of the soil was comparable to the behaviour of recently treated soil. These observations, similar for each treatment dosage, raise questions as to the durability of the treatment on the outer part of the backfill.
Copyright:
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