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Synergisms in the chemical degradation of polypropylene geotextiles – some experimental results

Title
Synergisms in the chemical degradation of polypropylene geotextiles – some experimental results
Type
Article in International Conference Proceedings Book
Year
2014
Authors
José Ricardo Carneiro
(Author)
FEUP
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Paulo Joaquim Almeida
(Author)
FCUP
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Maria de Lurdes Lopes
(Author)
FEUP
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Conference proceedings National
Pages: 1-9
14º Congresso Nacional de Geotecnia
Universidade da Beira Interior, Covilhã, 6 a 9 de abril de 2014
Scientific classification
CORDIS: Technological sciences
FOS: Engineering and technology
Other information
Resumo (PT): A durabilidade (resistência à degradação) é atualm ente um tem a m uito im portante na investigação dos geossintéticos. Os estudos existentes sobre este tema consideram , na sua m aioria, a ação isolada dos agentes de degradação, não contem plando as interações que podem ocorrer entre eles. Neste trabalho, foram estudadas algum as interações (sinergias) que podem existir entre alguns agentes e/ ou tipos de degradação dos geossintéticos. Para tal, um geotêxtil não-tecido agulhado de polipropileno estabilizado com 0,2% (m/ m ) do aditivo Chim assorb 944 foi exposto a vários ensaios de durabilidade. Num a prim eira fase, o m aterial foi exposto de form a isolada à ação de líquidos, à term o-oxidação (m étodo do forno) e ao envelhecim ento clim atérico (sim ulação artificial). Dessa form a, foi avaliado o efeito isolado de cada um destes agentes. Num a segunda fase, o geotêxtil foi exposto sucessivam ente a algum as com binações de dois dos agentes anteriores, procurando-se avaliar a existência de efeitos sinérgicos entre eles.
Abstract (EN): Durability ( resistance to degradat ion) is cur rent ly a very important topic of research in geosynthet ics. The exist ing studies about this topic consider most ly the isolated act ion of the degradat ion agents and do not contemplate the interact ions that can occur between them. In this work, some interact ions (synergies) that may exist between some agents/ types of degradat ion of geosynthetics were invest igated. To this end, a non-woven needle-punched polypropylene geotext ile stabilised with 0.2% (w/w) of the addit ive Chimassorb 944 was exposed to several durability tests. Initially, the material was exposed to the isolated act ion of liquids, thermo-oxidat ion (oven-ageing method) and art ificial weather ing. This allowed to evaluate the isolated effect of each of these agent s. In a second stage, the geotext ile was successively exposed to some combinat ions of two of the previous agents, seeking to evaluate the existence of synerget ic effects between them.
Language: Portuguese
Type (Professor's evaluation): Scientific
Contact: rcarneir@fe.up.pt
No. of pages: 9
License type: Click to view license CC BY-NC
Documents
File name Description Size
Artigo_JR_Carneiro_F - 01AM 161.76 KB
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