Degradation of polypropylene geotextiles with different chemical stabilisations in marine environments

• Tipo: Artigo em Revista Científica Internacional
• Data: 2018-03-20

Autores

Maria de Lurdes Lopes (Autor) FEUP; José Ricardo Carneiro (Autor) FEUP; Miguel Morais (Autor) Outra

Revista

Título: Construction and Building Materials

Vol. 165

Páginas: 877-886

ISSN: 0950-0618

Editora: Elsevier

Indexação

ISI Web of Knowledge - 2 Citações

ISI Web of Science

Scopus - 8 Citações

Classificação Científica

CORDIS: Ciências Tecnológicas

FOS: Ciências da engenharia e tecnologias

Projetos Associados

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

Outras Informações

ID Authenticus: P-00N-QBM

DOI: 10.1016/j.conbuildmat.2018.01.067

Abstract (EN): The geosynthetics applied in coastal engineering structures can be in contact with degradation agents capable of causing unwanted changes in their properties. In this work, three nonwoven polypropylene geotextiles with different stabilisation packages (different known amounts of Chimassorb 944 and carbon black) were exposed in situ to some degradation agents present in marine environments (weathering, seawater and action of tides). These exposures were carried out in Portugal (Archipelago of the Azores) and lasted for 36 months. The damage suffered by the geotextiles (in the different degradation tests) was evaluated quantitatively by monitoring changes in their physical (mass per unit area and thickness) and mechanical (tensile behaviour) properties. The results, among other findings, showed that: (1) weathering led to the highest damage in the geotextiles, (2) the weathering resistance of the geotextiles was highly enhanced by Chimassorb 944 and carbon black, (3) the geotextiles had a good resistance against the action of seawater and (4) the algae and dirt accumulated in the nonwoven structures during the exposure to the action of tides protected the geotextiles from UV-degradation (sunblind effect).

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10