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Geotechnical properties of dredged marine sediments treated at high water/cement ratio

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Abstract

Cement and lime are widely employed in soil and sediment treatment for an improvement of geotechnical properties, such as an increase in mechanical strength which enables beneficial use in various geotechnical applications. In this study, fine organic-rich dredged harbour sediments of 120% relative water content were treated with dry cement at contents varying between 2% and 10% of bulk sediment wet weight. Tests based on assessments of one-dimensional compression and Atterberg limits were performed on untreated and cement-treated sediments for various curing periods, as well as grain-size, SEM and X-ray diffraction analyses. The results confirm that increasing the cement content improves the geotechnical properties of these harbour sediments. Already in the early phase of curing (first 3 days of curing), particle size increases while sediment plasticity decreases. Changes in the compressibility behaviour include an increase in apparent preconsolidation pressure, in the compression index C c and in the primary consolidation coefficient C v, and a decrease in the secondary compression index \( C_\alpha \). This means that the new materials are characterized by a behaviour intermediate between that of fine and that of coarser soils.

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Authors and Affiliations

  1. Ecole Supérieure d’Ingénieurs de Poitiers, 40 avenue du Recteur Pineau, Poitiers cedex, 86032, France

    Boubaker Rekik

  2. Ecole Supérieure d’Ingénieurs des Travaux de la Construction de Caen, 1 rue Pierre et Marie Curie, Epron, 14610, France

    Mohamed Boutouil

Authors
  1. Boubaker Rekik
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  2. Mohamed Boutouil
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Correspondence to Boubaker Rekik.

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Rekik, B., Boutouil, M. Geotechnical properties of dredged marine sediments treated at high water/cement ratio. Geo-Mar Lett 29, 171–179 (2009). https://doi.org/10.1007/s00367-009-0134-x

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  • DOI: https://doi.org/10.1007/s00367-009-0134-x

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