Hydrodynamic behaviour of compacted granite sawdust from the dimension stone industry of Pontevedra (Spain): experimental and modelling
Hydrodynamic behaviour of compacted granite sawdust from the dimension stone industry of Pontevedra (Spain): experimental and modelling
Two large-scale column experiments have been performed to test the hydrodynamic behaviour of unsaturated, compacted granite sawdust—a material produced during the dressing of dimension stone in Pontevedra (Spain). One of the columns was equipped with psychrometers and capacitance probes while, in the other, a radial array of 80 electrodes made possible a time-dependent 3D electrical resistivity survey. All these devices allowed investigating and modelling the progressive saturation of the material. The study includes a straightforward methodology developed to calibrate the resistivity signals based on standard Proctor-compacted specimens. The progressive saturation of the granite sawdust reveals different stages: initially, an uneven advance of the saturation front (fingering) occurs; later on, this feature vanishes and is replaced by a more regular advance of the saturation front. Numerical analysis of the results shows that the yield capacity of the granite sawdust is ~0.39 m3 m?3 and a saturated hydraulic conductivity ~2 × 10?6 m s?1. The latter, which corresponds to the specific standard Proctor compaction, is not sufficient to support the use of granite sawdust for compacted-single-layer capping structures. Nonetheless, increased compaction efforts or improved design criteria (multilayer systems or capillary barriers) can keep bearing when considering granite sawdust for this purpose.
Sustainable waste management, Sanitary landfills, Unsaturated soil behaviour, Hydraulic conductivity, Yield capacity, Water fingering
Falcon-Suarez, Ismael
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Juncosa-Rivera, Ricardo
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Vardon, Phil
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Rammlmair, Dieter
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Günter, Thomas
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Noell, Ulla
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Delgado-Martín, Jordi
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March 2016
Falcon-Suarez, Ismael
9e8022b5-8799-4326-8d5b-0ed46de3b25a
Juncosa-Rivera, Ricardo
b2a1a522-adf9-4d15-b12d-e6c8d7dfe9d5
Vardon, Phil
ae3172d4-a918-48a0-ba69-e8636ccd6a47
Rammlmair, Dieter
419573bc-d305-4120-80c8-c13ef0ec1585
Günter, Thomas
2e14ca4d-99f4-4fc6-95ae-9f803c86d446
Noell, Ulla
fa54d390-54a2-4084-b26c-94346b9767e4
Delgado-Martín, Jordi
72c84350-653a-4cc2-9715-d32515a7558b
Falcon-Suarez, Ismael, Juncosa-Rivera, Ricardo, Vardon, Phil, Rammlmair, Dieter, Günter, Thomas, Noell, Ulla and Delgado-Martín, Jordi
(2016)
Hydrodynamic behaviour of compacted granite sawdust from the dimension stone industry of Pontevedra (Spain): experimental and modelling.
Environmental Earth Sciences, 75 (5).
(doi:10.1007/s12665-015-5112-1).
Abstract
Two large-scale column experiments have been performed to test the hydrodynamic behaviour of unsaturated, compacted granite sawdust—a material produced during the dressing of dimension stone in Pontevedra (Spain). One of the columns was equipped with psychrometers and capacitance probes while, in the other, a radial array of 80 electrodes made possible a time-dependent 3D electrical resistivity survey. All these devices allowed investigating and modelling the progressive saturation of the material. The study includes a straightforward methodology developed to calibrate the resistivity signals based on standard Proctor-compacted specimens. The progressive saturation of the granite sawdust reveals different stages: initially, an uneven advance of the saturation front (fingering) occurs; later on, this feature vanishes and is replaced by a more regular advance of the saturation front. Numerical analysis of the results shows that the yield capacity of the granite sawdust is ~0.39 m3 m?3 and a saturated hydraulic conductivity ~2 × 10?6 m s?1. The latter, which corresponds to the specific standard Proctor compaction, is not sufficient to support the use of granite sawdust for compacted-single-layer capping structures. Nonetheless, increased compaction efforts or improved design criteria (multilayer systems or capillary barriers) can keep bearing when considering granite sawdust for this purpose.
Text
FalconSuarez_etal_2016_finaldraf.pdf
- Accepted Manuscript
More information
Published date: March 2016
Keywords:
Sustainable waste management, Sanitary landfills, Unsaturated soil behaviour, Hydraulic conductivity, Yield capacity, Water fingering
Organisations:
Marine Geoscience
Identifiers
Local EPrints ID: 393825
URI: http://eprints.soton.ac.uk/id/eprint/393825
ISSN: 1866-6280
PURE UUID: ec73fb83-5375-48d9-928e-d9c64809dce8
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Date deposited: 05 May 2016 11:05
Last modified: 15 Mar 2024 05:33
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Author:
Ismael Falcon-Suarez
Author:
Ricardo Juncosa-Rivera
Author:
Phil Vardon
Author:
Dieter Rammlmair
Author:
Thomas Günter
Author:
Ulla Noell
Author:
Jordi Delgado-Martín
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