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第四届亚洲土工合成材料学术大会论文集 英文版_47.docx

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Unformatted text preview: CONCLUSIONS The retention ratio of tensile strength of geotextile composites after being exposed to ultraviolet rays was about 80% and showed a greater stability to ultraviolet rays as the weight of PET geotextile in the geotextile composites increased. Geotextile composites exhibited an increase in retention ratio of tensile strength as PP geotextile in the composites increased, after being exposed to ultraviolet rays. The stability of geotextile composites under various chemical conditions showed 80%-90% retention ratio of tensile properties to exhibit a rather stable property while being immersed in an acid buffer solution of pH 3 and 12 and leachate, which was collected in a refuse dump. In reality, the construction sites where geotextiles are used as water barrier liner are exposed to not only ultraviolet rays but day lights with heat, rains, temperalure, humidity and oxygen, etc. These environmental factors impact the overall characteristics of geotextiles REFERENCES simultaneously. Thus, future research to examine the weatherability of geotextiles to these factors is needed. ACKNOWLEDGEMENTS Baker TL (1997) Proceedings of '97 Geosynthetics Conference 3: 829 Koerner GR, Hsuan GY, Koerner RM (1998) J. of Geotechnical and Geoenvironmental Engineering 124:1 Artires O. Gaunet S, Bloquet C (1997) Geosynthetics International 4:393 Mathur A et al. (1994) Geotextiles and Geomembranes 13:591 Salman A el al. (1997) Proceedings of '97 Geosynthetics Conference 1:217 ASTM International (2007) ASTM D 4355-07 Standard Test Method for Deterioration of Geotextiles by Exposure to Light. Moisture and Heat 2 9 in a Xenon Arc Type Apparatus, West Conshohocken, PA, USA ASTM International (2005) ASTM G 155-05a, Standard Practice for Operating Xenon Arc Light Apparatus for Exposure of Non-Metallic Materials West Conshohocken. PA. USA EPA (1997) EPA 9090 test method. Environmental Protection Agency, USA ASTM International (2007) ASTM D5034. Standard Test Method for Breaking Strength and Elongation of Textile Fabrics (Grab Test), West Conshohocken. PA, USA This work was supported by grant No. RTI04-01-04 from the Regional Technology Innovation Program of the Ministry of Commerce. Industry, and Energy (MOCIE). 2 9 ...
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