Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Compacted sand–bentonite mixtures for the confinement of waste landfills
https://orcid.org/http://orcid.org/0000-0003-0578-381X
This paper illustrates the results of an experimental study on sand–bentonite mixtures for their use as confinement barriers for solid waste landfills. The mixtures have been prepared parametrically varying the percentage of bentonite. The sample preparation method was established willing to simulate the compaction processes on site. In fact, the compacted samples were tested following two different stress-wetting paths representative of the possible stress and imbibition sequences occurring on a landfill confinement barrier. In the first case, the barrier comes into contact with rainwater before being subjected to the overloading stress induced by waste disposal, while, in the second case, the barrier is overloaded by the waste before being wetted by the leachate. The compressibility and permeability of the sand–bentonite mixtures were determined, in both cases, by oedometric compression tests. The experimental results are analysed and compared in order to evaluate the influence of the bentonite content on the mechanical and hydraulic behaviour of the mixture. Interpretation of the results is also accomplished with a micro-mechanical investigation of the mixtures fabric. Suitable compositions of sand and bentonite are finally proposed for the design of effective confinement barriers.
Compacted sand–bentonite mixtures for the confinement of waste landfills
https://orcid.org/http://orcid.org/0000-0003-0578-381X
This paper illustrates the results of an experimental study on sand–bentonite mixtures for their use as confinement barriers for solid waste landfills. The mixtures have been prepared parametrically varying the percentage of bentonite. The sample preparation method was established willing to simulate the compaction processes on site. In fact, the compacted samples were tested following two different stress-wetting paths representative of the possible stress and imbibition sequences occurring on a landfill confinement barrier. In the first case, the barrier comes into contact with rainwater before being subjected to the overloading stress induced by waste disposal, while, in the second case, the barrier is overloaded by the waste before being wetted by the leachate. The compressibility and permeability of the sand–bentonite mixtures were determined, in both cases, by oedometric compression tests. The experimental results are analysed and compared in order to evaluate the influence of the bentonite content on the mechanical and hydraulic behaviour of the mixture. Interpretation of the results is also accomplished with a micro-mechanical investigation of the mixtures fabric. Suitable compositions of sand and bentonite are finally proposed for the design of effective confinement barriers.
Compacted sand–bentonite mixtures for the confinement of waste landfills
https://orcid.org/http://orcid.org/0000-0003-0578-381X
This paper illustrates the results of an experimental study on sand–bentonite mixtures for their use as confinement barriers for solid waste landfills. The mixtures have been prepared parametrically varying the percentage of bentonite. The sample preparation method was established willing to simulate the compaction processes on site. In fact, the compacted samples were tested following two different stress-wetting paths representative of the possible stress and imbibition sequences occurring on a landfill confinement barrier. In the first case, the barrier comes into contact with rainwater before being subjected to the overloading stress induced by waste disposal, while, in the second case, the barrier is overloaded by the waste before being wetted by the leachate. The compressibility and permeability of the sand–bentonite mixtures were determined, in both cases, by oedometric compression tests. The experimental results are analysed and compared in order to evaluate the influence of the bentonite content on the mechanical and hydraulic behaviour of the mixture. Interpretation of the results is also accomplished with a micro-mechanical investigation of the mixtures fabric. Suitable compositions of sand and bentonite are finally proposed for the design of effective confinement barriers.
Compacted sand–bentonite mixtures for the confinement of waste landfills
Acta Geotech.
Proia, Robeta (Autor:in) / Salvatore, Erminio (Autor:in) / Croce, Paolo (Autor:in) / Modoni, Giuseppe (Autor:in)
Acta Geotechnica ; 19 ; 8007-8022
01.12.2024
16 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Bentonite compaction , Bentonite swelling , Bentonite hydraulic conductivity , Compaction of sand–bentonite mixtures , Hydraulic conductivity of sand–bentonite mixtures , Oedometer test on bentonite , Oedometer test on sand–bentonite mixtures , Sand–bentonite mixtures , Swelling of sand–bentonite mixtures , Waste landfills confinement Engineering , Geoengineering, Foundations, Hydraulics , Solid Mechanics , Geotechnical Engineering & Applied Earth Sciences , Soil Science & Conservation , Soft and Granular Matter, Complex Fluids and Microfluidics
Compacted sand–bentonite mixtures for the confinement of waste landfills
| Springer Verlag | 2024
Swelling of compacted sand–bentonite mixtures
| Online Contents | 2009
Swelling of compacted sand–bentonite mixtures
| Online Contents | 2009
Swelling of compacted sand–bentonite mixtures
| Elsevier | 2008
Hydraulic conductivity of compacted bentonite-sand mixtures
| British Library Online Contents | 1992