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Assessment of smectite-rich claystones from Northpatagonia for their use as liner materials in landfills

Musso, Telma B. and Roehl, Karl Ernst and Pettinari, G. and Vallés, J. M. (2010):
Assessment of smectite-rich claystones from Northpatagonia for their use as liner materials in landfills.
In: Applied Clay Science, Elsevier, pp. 438-445, 48, (3), ISSN 0169-1317, [Article]

Abstract

Two types of Northpatagonic claystones (a commercially available sodium bentonite and selected smectite-rich claystones from the Upper Cretaceous Allen Formation) are considered as potential materials for landfill liners. To check the suitability of the claystones, physical (hydraulic conductivity, compaction, consolidation, and swelling), chemical (cation exchange capacity and bulk chemical analysis) and mineralogical analysis (X-ray diffraction and scanning electron microscope) were performed. Both claystone types showed very similar properties, which allow us to classify the smectite-rich claystones as bentonites. The high compressibility of the claystones makes them unsuitable to use them directly as liner materials. On the other hand, in combination with well graded sand, these materials satisfy the requirements stipulated by internationally accepted standards for compacted clay liners in municipal waste disposal repositories. In this way, a new applicability for clay materials of regional provenance was found.

Item Type: Article
Erschienen: 2010
Creators: Musso, Telma B. and Roehl, Karl Ernst and Pettinari, G. and Vallés, J. M.
Title: Assessment of smectite-rich claystones from Northpatagonia for their use as liner materials in landfills
Language: English
Abstract:

Two types of Northpatagonic claystones (a commercially available sodium bentonite and selected smectite-rich claystones from the Upper Cretaceous Allen Formation) are considered as potential materials for landfill liners. To check the suitability of the claystones, physical (hydraulic conductivity, compaction, consolidation, and swelling), chemical (cation exchange capacity and bulk chemical analysis) and mineralogical analysis (X-ray diffraction and scanning electron microscope) were performed. Both claystone types showed very similar properties, which allow us to classify the smectite-rich claystones as bentonites. The high compressibility of the claystones makes them unsuitable to use them directly as liner materials. On the other hand, in combination with well graded sand, these materials satisfy the requirements stipulated by internationally accepted standards for compacted clay liners in municipal waste disposal repositories. In this way, a new applicability for clay materials of regional provenance was found.

Journal or Publication Title: Applied Clay Science
Volume: 48
Number: 3
Publisher: Elsevier
Uncontrolled Keywords: Bentonite; Smectite-rich claystones; Liner materials; Landfills
Divisions: 11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences
Date Deposited: 07 May 2010 12:59
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