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

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Castorina S. Vieira (Author) FEUP; Paulo Pereira (Author) FEUP

Journal

Title: Geosynthetics International

Serial No. 1 Vol. 23 No. 1

Pages: 62-70

ISSN: 1072-6349

Publisher: ICE Publishing Ltd.

Indexing

ISI Web of Knowledge - 42 Citations

ISI Web of Science

Scopus - 46 Citations

Scientific classification

FOS: Engineering and technology > Civil engineering

CORDIS: Technological sciences > Engineering > Civil engineering

Associated Projects

RCD-VALOR - Aplicação sustentável de Resíduos de Construção e Demolição (RCD) em estruturas reforçadas com geossintéticos

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9