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Development of an Accelerated Creep Testing Procedure for Geosynthetics
The report presents a procedure for predicting creep strains of geosynthetics using accelerated creep tests at elevated temperatures. Creep testing equipment was constructed and tests were performed on two types of geosynthetics: High Density Polyethylene (HDPE) geogrid, and Polyester (PET) geogrid, typically used in soil reinforcement applications. Creep strains at room temperature were first measured in 10,000 hour tests at various loading levels. Accelerate creep tests were then conducted at the same loads for 1,000 hours at various controlled-temperatures up to 72 deg C (160 deg F). The procedure for extrapolating creep striains from elevated temperature tests using the Arrhenius Equation was evaluated. An interpretation procedure based on shifting the 1,000 hour temperature curves to form creep response curves (master curves) at longer times was applied. Shift factors were established through comparison of the master curves with the 10,000 hour test results at room temperature. The master curves were compared with the analytical relationship of the temperature-shift factors known as the WLF equation. Creep curves were then established to predict creep response up to 100,000 hours (2 cycles shift on the log-time scale from the 1,000 hour tests results).
Development of an Accelerated Creep Testing Procedure for Geosynthetics
The report presents a procedure for predicting creep strains of geosynthetics using accelerated creep tests at elevated temperatures. Creep testing equipment was constructed and tests were performed on two types of geosynthetics: High Density Polyethylene (HDPE) geogrid, and Polyester (PET) geogrid, typically used in soil reinforcement applications. Creep strains at room temperature were first measured in 10,000 hour tests at various loading levels. Accelerate creep tests were then conducted at the same loads for 1,000 hours at various controlled-temperatures up to 72 deg C (160 deg F). The procedure for extrapolating creep striains from elevated temperature tests using the Arrhenius Equation was evaluated. An interpretation procedure based on shifting the 1,000 hour temperature curves to form creep response curves (master curves) at longer times was applied. Shift factors were established through comparison of the master curves with the 10,000 hour test results at room temperature. The master curves were compared with the analytical relationship of the temperature-shift factors known as the WLF equation. Creep curves were then established to predict creep response up to 100,000 hours (2 cycles shift on the log-time scale from the 1,000 hour tests results).
Development of an Accelerated Creep Testing Procedure for Geosynthetics
K. Farrag (author) / J. Oglesby (author)
1997
128 pages
Report
No indication
English
Construction Equipment, Materials, & Supplies , Creep tests , Accelerated testing , Polyethylene , Polyesters , Geotechnical fabrics , Geotechnical engineering , Creep properties , Temperature effects , Strain measurement , Strain rate , Loads(Forces) , Arrhenius equation , Time , Geosynthetics , Geogrids
Development of an Accelerated Creep Testing Procedure for Geosynthetics -- Part I: Testing
| Online Contents | 1997
Development of an Accelerated Creep Testing Procedure for Geosynthetics - Part I: Testing
| British Library Online Contents | 1997
Development of an Accelerated Creep Testing Procedure for Geosynthetics, Part II: Analysis
| British Library Online Contents | 1998
Development of an Accelerated Creep Testing Procedure for Geosynthetics, Part II: Analysis
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Confined-accelerated Creep Tests on Geosynthetics
| Tema Archive | 2013