| Issue |
E3S Web of Conf.
Volume 544, 2024
8th International Symposium on Deformation Characteristics of Geomaterials (IS-Porto 2023)
|
|
|---|---|---|
| Article Number | 11007 | |
| Number of page(s) | 8 | |
| Section | Behaviour, Characterization and Modelling of Various Geomaterials and Interfaces - Soil Stabilisation and Improvement | |
| DOI | https://doi.org/10.1051/e3sconf/202454411007 | |
| Published online | 02 July 2024 | |
On the use of seashells as green solution to mechanically stabilise dredged sediments
1 ETH-Zurich, Institut für Geotechnik, Stefano-Franscini-Platz 5, 8093 Zürich, Switzerland
2 Politecnico di Bari, DICATECh, Orabona n.4, 70125 Bari, Italy
3 Innovhub s.r.l, Giuseppe Colombo 83, 20133 Milano, Italy
* Corresponding author: rossella.petti@poliba.it
The article reports the results of an experimental activity conducted on dredged fine-grained marine sediments and aimed to find out novel eco-friendly solutions for their mechanical stabilisation. The main idea of this research is to use seashells, i.e., another waste material, to partially replace cement binders in the mechanical stabilisation of sediments for the production of a new stable material that can potentially be used in construction. To this aim, an original procedure has been developed to obtain a powder of mussel shells without their calcination. Physical properties, one-dimensional compression behaviour and permeability of the novel mixtures including sediments, mussel shell powder and cements are presented for different curing times. The efficacy of the solutions is assessed also by comparison with the performance of control mixtures prepared by mixing the same sediments with cement only. The effects of the different treatments on the soil properties were analysed, demonstrating multiple beneficial effects of using the mussel shell powder. Evidence is provided that seashells represent a viable alternative to cement, as they were found to be as effective as traditional hydraulic binders, when replacing them up to 1/4, in enhance geomechanical and geochemical performance of the stabilized material.
Key words: dredged sediment / mussel shells / mechanical stabilisation
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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