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Durability of polyolefin geosynthetic drains
Alternative TitleGeosynth. Int.
Mueller, W. W.1; Jakob, I.; Li, C. S.2,3; Tatzky-Gerth, R.
2009-02-01
Source PublicationGEOSYNTHETICS INTERNATIONAL
ISSN1072-6349
Volume16Issue:1Pages:28-42
AbstractThe German Federal Institute for Materials Research and Testing (BAM) has established a testing guideline to assess the suitability of geosynthetic or geocomposite drain (GCD) elements for final landfill cover systems. In an earlier paper the uniform procedure according to the BAM guideline for determining long-term water flow capacity was described, and the structural stability of drain cores under creep was investigated. The extrapolation of creep curves is permissible only when it can be shown, over the extrapolated period (at least 100 years), that oxidative aging does not invoke any relevant changes in the polyolefin material. This can be shown by measuring antioxidant depletion and mechanical degradation of the drain cores and filter/protection geotextiles in oven aging and water immersion tests. In this paper the results of such aging studies on three different GCD products are reported. Degradation of the tensile strength of HALS-stabilized polypropylene needle-punched nonwoven geotextiles (PP NWGTs) starts right from the beginning of the oven aging. This has to be taken into account for lifetime predictions based on residual tensile strength. The rate of oxidative degradation of NWGTs decreases significantly with increasing mass per area. Therefore the expected service life sets a limit on acceptable geotextile grammage. Antioxidant depletion in the drain cores, which are made of relatively thick PP strands or HDPE ribs, is about an order of magnitude slower than in filter and protection NWGTs, which are made of thin fibers. Service life values in excess of 100 years may be obtained for the products when the geotextiles and drain cores are properly stabilized and designed.; The German Federal Institute for Materials Research and Testing (BAM) has established a testing guideline to assess the suitability of geosynthetic or geocomposite drain (GCD) elements for final landfill cover systems. In an earlier paper the uniform procedure according to the BAM guideline for determining long-term water flow capacity was described, and the structural stability of drain cores under creep was investigated. The extrapolation of creep curves is permissible only when it can be shown, over the extrapolated period (at least 100 years), that oxidative aging does not invoke any relevant changes in the polyolefin material. This can be shown by measuring antioxidant depletion and mechanical degradation of the drain cores and filter/protection geotextiles in oven aging and water immersion tests. In this paper the results of such aging studies on three different GCD products are reported. Degradation of the tensile strength of HALS-stabilized polypropylene needle-punched nonwoven geotextiles (PP NWGTs) starts right from the beginning of the oven aging. This has to be taken into account for lifetime predictions based on residual tensile strength. The rate of oxidative degradation of NWGTs decreases significantly with increasing mass per area. Therefore the expected service life sets a limit on acceptable geotextile grammage. Antioxidant depletion in the drain cores, which are made of relatively thick PP strands or HDPE ribs, is about an order of magnitude slower than in filter and protection NWGTs, which are made of thin fibers. Service life values in excess of 100 years may be obtained for the products when the geotextiles and drain cores are properly stabilized and designed.
KeywordGeosynthetics Geosynthetic Drain Elements Long-term Behavior Oxidative Degradation
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
DOI10.1680/gein.2009.16.1.28
URL查看原文
Indexed BySCI
Language英语
WOS KeywordPOLYPROPYLENE ; DEGRADATION ; GEOMEMBRANES ; TEMPERATURE ; ANTIOXIDANT ; LIFETIME ; FILMS
WOS Research AreaEngineering ; Geology ; Materials Science
WOS SubjectEngineering, Geological ; Geosciences, Multidisciplinary ; Materials Science, Multidisciplinary
WOS IDWOS:000262909100003
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/11497
Collection研究所(批量导入)
Affiliation1.BAM Fed Inst Mat Res & Testing, Grp Plast Geotech & Geoenvironm Engn 4 32, D-12200 Berlin, Germany
2.Nagoya Univ, EcoTopia Sci Inst, Chikusa Ku, Nagoya, Aichi 4648503, Japan
3.Chinese Acad Sci, IPE, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Mueller, W. W.,Jakob, I.,Li, C. S.,et al. Durability of polyolefin geosynthetic drains[J]. GEOSYNTHETICS INTERNATIONAL,2009,16(1):28-42.
APA Mueller, W. W.,Jakob, I.,Li, C. S.,&Tatzky-Gerth, R..(2009).Durability of polyolefin geosynthetic drains.GEOSYNTHETICS INTERNATIONAL,16(1),28-42.
MLA Mueller, W. W.,et al."Durability of polyolefin geosynthetic drains".GEOSYNTHETICS INTERNATIONAL 16.1(2009):28-42.
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