Nowadays liinited dataa1c available to show correlations between tests conducted with natural outdoor exposure vs. accelerated weathering tests on geosynthetics. This paper compares the results obtained after one year of outdoor exposures in Italy at the 45° pa 1-allel with tests conducted in laboratory using a UV-B fluorescent lamp apparatus up to 3000 hours of exposure. The
onnances of seven different of geosynthetics have been compared with those of virgin specirrens by means of change in tensile properties.