Development of a Laboratory Apparatus for Tensile Testing of Geosynthetics at Elevated Temperatures under Confined and Unconfined Conditions

Authors

Faculty of Civil Engineering, University of Tabriz, Tabriz 5166616471, Iran

Abstract

Geosynthetics are among the most widely used materials in reinforced soil structures, embankments, pavements, and retaining walls. Owing to their polymeric nature, the mechanical behavior of these materials is highly sensitive to temperature variations, as the thermomechanical response of polymer chains directly influences their stiffness, strength, strain at failure, and creep. Although numerous studies have investigated the tensile response of geosynthetics at ambient temperature, only a limited number have addressed their performance at elevated temperatures under confining stress. Conventional testing methods, such as ASTM D6637, are conducted under unconfined laboratory conditions, whereas in the field, geosynthetics are buried within soil and subjected to confinement. Neglecting the realistic soil and geogrid interaction leads to overly conservative predictions and uneconomical designs. Elevated service temperatures significantly reduce the stiffness and ultimate strength of geosynthetics; therefore, investigating the thermomechanical behavior of these materials under conditions more representative of field conditions is essential. The objective of the present study is to design and develop a novel apparatus for evaluating the tensile behavior of geogrids at elevated temperatures, which is a system capable of performing tests under both confined and unconfined conditions with precise control of temperature and confinement. Data obtained from confined tests, which more closely represent field behavior, can be employed in back-analysis procedures and the calibration of predictive models.

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References

American Association of State Highway and Transportation Officials (AASHTO)., “LRFD bridge design specifications”, 4th ed., Washington, DC: AASHTO, 2011. https://searchworks.stanford.edu/view/12366149
ASTM International, “ASTM D6637/D6637M-15: Standard test method for determining tensile properties of geogrids by the single or multi-rib tensile method”, West Conshohocken, PA, USA: ASTM International, 2015. https://www.astm.org/d6637-11.html 
Behnia K, “Application of reinforced soil in the construction of ground shelters and protection of fuel tanks”, Technical Faculty Journal, 1970, 42 (In Persian).
Behnia K, “Reinforced soil”, Technical Faculty Publication, 1975, 31 (In Persian).
Órszczyk J, Malicki K, “Application of the digital image correlation technique in wide width tensile testing of geogrids”, Geotextiles and Geomembranes, 2024, 52 (6), 1087-1098. https://doi.org/10.1016/j.geotexmem.2024.07.012 
Helwany S, Wu J, Meinholz P, “Seismic design of geosynthetic-reinforced soil bridge abutments with modular block facing”, NCHRP Project 12-59 (01), Washington, D.C.: Transportation Research Board, 2012. https://doi.org/10.17226/17649
Hsieh C, Tseng YC, “Tensile creep behavior of a PVC-coated polyester geogrid at different temperatures”, Journal of Geoengineering, 2008, 3 (3), 113-119. http://yo.1.ct.ntust.edu.tw/jge/files/articlefiles/v3i3200904281767809864.pdf
Karademir T, “Elevated temperature effects on interface shear behavior”, Ph.D. Thesis, Georgia Institute of Technology, USA, 2011. https://repository.gatech.edu/bitstreams/f2c2e384-6526- 4ac2-a37b- 5a335db75c17/download
Karademir T, Frost JD, “Apparatus for geosynthetic interface testing and evaluation under elevated temperature conditions”, Journal of Testing and Evaluation, 2013, 41 (2), 313-323. https://doi.org/10.1520/JTE20120153
Kasozi AM, Siddharthan RV, Mahamud R, “Temperature distribution in mechanically stabilized earth wall soil backfills for design under elevated temperature conditions”, Journal of Thermal Science and Engineering Applications, 2015, 7 (2), 021004. https://doi.org/10.1115/1.4029354
Koerner RM, “Designing with geosynthetics”, 5th ed., Upper Saddle River, NJ: Pearson Prentice Hall, 2005. https://openlibrary.org/books/OL7336510M
Kongkitkul W, Tabsombut W, Jaturapitakkul C, Tatsuoka F, “Effects of temperature on the rupture strength and elastic stiffness of geogrids”, Geosynthetics International, 2012, 19 (2), 106-123. https://doi.org/10.1680/gein.2012.19.2.106
Liu H, Yan J, Wang Z, Zhang F, “Influence of strain rate and temperature on the tensile behavior of HDPE geogrids”, Construction and Building Materials, 2024, 411, 134582. https://doi.org/10.1016/j.conbuildmat.2023.134582
Mitchell JK, McMillan JC, Green SL, Sisson RC, “Field testing of cable backfills systems”, In: Underground Cable Thermal Backfill, Oxford: Pergamon, 1982, 19-33. https://doi.org/10.1016/b978-0-08-025387-9.50007-5
Nafei MM, Bartz JR, Alfaro M, Ghazy A, “Tensile strength freeze-thaw durability of a biaxial geogrid and wicking geogrid composite”, Geosynthetics International, 2026, 33 (4), 380-392. https://doi.org/10.1680/jgein.25.00152
Pepper DW, Chen Y, “Heat transfer analysis of nuclear waste casks stored in the Yucca Mountain repository”, Numerical Heat Transfer, Part A: Applications, 2005, 47 (7), 671-690. https://doi.org/10.1080/10407780590945177
Wang Z, Chen Y, Xie Y, Xue J, “Investigation of geogrid-reinforced unbound granular material behavior using constant radial stiffness triaxial tests”, Geotextiles and Geomembranes, 2025, 53 (3), 728-743. https://doi.org/10.1016/j.geotexmem.2025.01.007
Yarivand A, Behnia C, Bakhtiyari S, Ghalandarzadeh A, “Performance of geosynthetic reinforced soil bridge abutments with modular block facing under fire scenarios”, Computers and Geotechnics, 2017, 85, 28-40. https://doi.org/10.1016/j.compgeo.2016.12.021
Zornberg JG, Byler BR, Knudsen JW, “Creep of geotextiles using time-temperature superposition methods”, Journal of Geotechnical and Geoenvironmental Engineering, 2004, 130 (11), 1158-1168. https://doi.org/10.1061/(ASCE)1090-0241(2004)130:11(1158)
Journal of Civil and Environmental Engineering
Volume 56, Issue 123 - Serial Number 123
Summer 2026
September 2026
Pages 45-57

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