Resistance of polypropylene geotextiles against physical and chemical degradation agents

• Type: Article in International Conference Proceedings Book
• Date: 2019-10

Authors

Maria de Lurdes Lopes (Author) FEUP; José Ricardo Carneiro (Author) FEUP; António T. Gomes (Author) FEUP

Conference proceedings International

Title: ARC 2019 - 17th African Regional Conference on Soil Mechanics and Geotechnical Engineering

Pages: 193-198

Scientific classification

CORDIS: Technological sciences

FOS: Engineering and technology

Associated Projects

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

Other information

Abstract (EN): The geotextiles can suffer short and long-term resistance changes due to the action of many degradation agents. This work evaluates the resistance of six polypropylene geotextiles (materials with different structures, masses per unit area and stabilisation packages) against physical and chemical degradation agents: action of acids and alkalis, hydrolysis, thermo-oxidation (oven-ageing method) and weathering. The exposure to weathering was carried out under natural degradation conditions (outdoor exposure during a maximum period of 12 months) and under accelerated conditions (exposure in a laboratory weatherometer). The damage suffered by the geotextiles (in the durability tests) was evaluated by monitoring changes in their tensile behaviour. The results, among other findings, showed that: (1) the geotextiles had a relatively good resistance against the action of acids, alkalis and hydrolysis, (2) the exposures to thermo-oxidation and to weathering can provoke relevant changes in the tensile properties of the geotextiles and (3) the resistance against thermo-oxidation and weathering can be highly improved by the presence of chemical stabilisers.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6