Interface shear properties of geosynthetics and construction and demolition waste from large-scale direct shear tests

• Tipo: Artigo em Revista Científica Internacional
• Data: 2016

Autores

Castorina Silva Vieira (Autor) FEUP; Paulo Pereira (Autor) FEUP

Revista

Título: Geosynthetics International

Nº de Série 1 Vol. 23 Nº 1

Páginas: 62-70

ISSN: 1072-6349

Editora: ICE Publishing Ltd.

Indexação

ISI Web of Knowledge - 42 Citações

Scopus - 46 Citações

Outras Informações

ID Authenticus: P-00K-5WV

DOI: 10.1680/jgein.15.00030

Abstract (EN): In recent years environmental sustainability has demanded a progressive increase of waste recycling in general and waste value-added utilisation in the construction industry in particular. As regards the application of construction and demolition wastes (C&DW) in geotechnical works, it has been noticed that the use of recycled aggregates is found mostly in road construction. Value-added utilisation of C&DW in geosynthetic-reinforced structures is almost an unexplored field. This paper presents the results of physical, mechanical and environmental characterisation of recycled C&DW, as well as the direct shear behaviour of three recycled C&DW-geosynthetic interfaces. The C&DW material was collected from a recycling plant and came from the demolition of single-family houses and the cleaning of land with illegal deposits of C&DW. Two geogrids and one geocomposite reinforcement (high-strength geotextile) were used to assess the behaviour of C&DW-geosynthetic interfaces. The environmental characterisation of the C&DW, carried out through leaching tests, did not show environmental concerns. Direct shear test results have demonstrated that properly selected and compacted C&DW can exhibit shear strength similar to natural soils. The coefficients of interaction achieved for C&DW-geosynthetic interfaces compare well with those reported in the literature for soil-geosynthetic interfaces under similar conditions, which supports the feasibility of using these recycled materials as backfill in geosynthetic-reinforced structures.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9