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Outdoor and UV-B laboratory weathering resistance of geosynthetics
Nowadays limited data are available to show correlations between tests conducted with natural outdoor exposure versus accelerated weathering tests on geosynthetics. This paper compares the results obtained after one year of outdoor exposures in Italy at the 45 degree parallel with tests conducted in laboratory using a UV-B fluorescent lamp apparatus up to 3000 hours of exposure. The performances of seven different types of geosynthetics have been compared with those of virgin specimens by means of change in tensile properties. The geosynthetics tested comprised one nonwoven of PET and PP each, two biaxial geogrids of PP, one uniaxial geogrid of PE, two geomembranes of PVC and one geomembrane of HDPE. Test criteria were the retained peak tensile strength and the retained strain at peak after exposure. Overall good correlation was found in the product ranking whereas there were, as expected, differences between the absolute values. After 2000 hours of UV-B exposure the geotextiles made of PP and PET were practically destroyed. The three groups geotextiles, geogrids and geomembranes behaved differently which in one respect was apparently due to the fact that aging is largely influenced by the thickness of the product i.e. the area of exposed surface.
Outdoor and UV-B laboratory weathering resistance of geosynthetics
Nowadays limited data are available to show correlations between tests conducted with natural outdoor exposure versus accelerated weathering tests on geosynthetics. This paper compares the results obtained after one year of outdoor exposures in Italy at the 45 degree parallel with tests conducted in laboratory using a UV-B fluorescent lamp apparatus up to 3000 hours of exposure. The performances of seven different types of geosynthetics have been compared with those of virgin specimens by means of change in tensile properties. The geosynthetics tested comprised one nonwoven of PET and PP each, two biaxial geogrids of PP, one uniaxial geogrid of PE, two geomembranes of PVC and one geomembrane of HDPE. Test criteria were the retained peak tensile strength and the retained strain at peak after exposure. Overall good correlation was found in the product ranking whereas there were, as expected, differences between the absolute values. After 2000 hours of UV-B exposure the geotextiles made of PP and PET were practically destroyed. The three groups geotextiles, geogrids and geomembranes behaved differently which in one respect was apparently due to the fact that aging is largely influenced by the thickness of the product i.e. the area of exposed surface.
Outdoor and UV-B laboratory weathering resistance of geosynthetics
Untersuchung der Witterungsbeständigkeit synthetischer Geomaterialien mittels Freiluftbewitterung und Ultraviolettbestrahlung im Labor
Cazzuffi, D.A. (author) / Fede, L. (author) / Montanelli, F. (author) / Rimoldi, P. (author)
1994
4 Seiten, 4 Bilder, 3 Tabellen, 5 Quellen
Conference paper
English
Outdoor and UV-B Laboratory Weathering Resistance of Geosynthetics
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