Natural weathering of polypropylene geotextiles treated with different chemical stabilisers

• Type: Article in International Scientific Journal
• Date: 2017-12-01

Authors

Maria de Lurdes Lopes (Author) FEUP; José Ricardo Carneiro (Author) FEUP

Journal

Title: Geosynthetics International

Vol. 24

Pages: 544-553

ISSN: 1072-6349

Publisher: ICE Publishing Ltd.

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 6 Citations

Scientific classification

CORDIS: Technological sciences

FOS: Engineering and technology

Associated Projects

GeoSynergism - Avaliação de Efeitos Sinérgicos na Degradação de Geossintéticos (GeoSinergismo)

Other information

Authenticus ID: P-00N-A5N

DOI: 10.1680/jgein.17.00020

Abstract (EN): Weathering (mainly due to solar radiation) may cause unwanted changes in the properties of geosynthetics, affecting their performance and shortening their lifetime. In this work, four nonwoven polypropylene geotextiles were exposed to natural weathering in Portugal during a maximum period of 3 years. The geotextiles were structurally identical, but had different known amounts of a hindered amine light stabiliser and carbon black in their composition. The damage suffered by the geotextiles (caused by weathering) was evaluated qualitatively (by visual inspection) and quantitatively by monitoring changes in their mechanical properties (tensile and static puncture tests). The results, among other findings, showed that: (1) weathering led to the deterioration of the mechanical properties of the geotextiles, (2) the behaviour of the geotextiles was highly dependent on their chemical composition, (3) the weathering resistance of the geotextiles was highly enhanced by the hindered amine light stabiliser and/or by carbon black, (4) a higher amount of the hindered amine light stabiliser (an increase from 0.2% to 0.4%, w/w) led to better weathering resistance and (5) the presence of carbon black (1.08%, w/w) in combination with the hindered amine light stabiliser (0.2%, w/w) resulted in the best protection against weathering.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10