Deneele, D., Le Runigo, B., Cui, Y.-J., Cuisinier, O. & Ferber, V. (2016) Experimental assessment regarding leaching of lime-treated silt. Constr. Build. Mater. 112 1032–1040.
Added by: Richard Baschera (2016-05-19 09:14:42) Last edited by: Richard Baschera (2017-04-03 14:10:06)
|Type de référence: Article
Numéro d'identification (ISBN etc.): 0950-0618
Clé BibTeX: Deneele2016
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Mots-clés: behavior, cement, clays, durability, fly-ash, impact, laterite, Leaching, Lime-treated silt, Long term durability, plasticity, Pozzolanic reaction, soil stabilization, state
Créateurs: Cui, Cuisinier, Deneele, Ferber, Le Runigo
Collection: Constr. Build. Mater.
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Durability of lime -treated soil structures, such as earth dams, dikes or river levees, is related to stability, or long term physicochemical evolution of soils in their service environment. The present work aims at (i) providing information on the long term physicochemical behaviour of lime -treated soils subjected to leaching, and (ii) assessing if leaching could be detrimental to the durability of lime -treated soils. Lime addition improves the unconfined compressive strength (UCS) of silt by formation of secondary cementitious phases (C -A -S -H, C -A -H,...) and carbonation of lime. The UCS increases with the lime added. Leaching induces a leaching of these secondary phases, as recorded by the evolution of the chemistry of the leachates. The results obtained indicate that addition of lime up to soil lime modification optimum (LMO at 1% lime) is not sufficient to maintain long term durability of lime -treated soils. Addition of important lime contents extends the resistance of materials, but the UCS decreases. However, leaching of cementitious phases has no effect on the hydraulic conductivity of materials. (C) 2016 Elsevier Ltd. All rights reserved.