Abstract
This study presents experimental studies on EPS geofoam using cyclic uniaxial compression (CUC), accelerated creep and pseudo-long-term tests. For all experiments 100 mm cube geofoam samples of 15 kg/m3 density (EPS15) are used. Servo-hydraulic actuator and temperature regulated water chamber (TRWC) are used. CUC tests are performed at two loading frequencies 0.5 and 3 Hz, R values of 0.4, 0.6, 0.8, 1 and 1.2 and 5000 loading cycles. Term ‘R’ defined as ratio of combined axial static and cyclic stress component to the yield strength of geofoam. To understand creep behavior of geofoam Time temperature stress superposition (TTSS) accelerated creep testing method is adopted. Master creep curve is developed for a designed strength of 20% compressive strength (σ c ) and reference temperature of 29 °C. From CUC tests it is observed that effect of number of cycles is insignificant on secant modulus (E dyn ) compared to R and loading frequencies. Also, Poisson’s ratio (υ) is observed to vary from positive to negative, and it majorly depends on R values and number of cycles. From TTSS method 2.12% compressive creep (CC) strain is observed at 100 years for EPS15 geofoam. Pseudo-long-term tests are performed at various CC intervals and it is noted that Young’s modulus (E) decreases with increase in CC. E, compressive strength and yield strength of CC sustained samples are decreased from that of initial or non-CC sustained samples. Moreover, Young’s modulus of geofoam reduces with time.
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References
Horvath JS (1994) Expanded polystyerene (EPS) geofoam: an introduction to material behavior. Geotext Geomembr 23:00001. https://doi.org/10.1016/0266-1144(94)90048-5
Partos AM, Kazaniwsky PM (1987) Geoboard reduces lateral earth pressures. Paper presented at the Geosynthetics’87. Industrial Fabrics Association International. New Orleans, LA, USA, pp 628–639
Rajagopal K, Pitchumani NK, Purnanandam K (2000) Earth pressure reduction behind rigid box culverts: a case study. Paper presented at the Indian Geotechnical Conference 2000, The millennium conference, 38(3):317–333
Zarnani S, Bathurst RJ (2008) Numerical modelling of EPS seismic buffer shaking table tests. Geotext Geomembr 26(5):00001. https://doi.org/10.1016/j.geotexmem.2008.02.004
Ikizler SB, Aytekin M, Vekli M (2009) Reductions in swelling pressure of expansive soil stabilized using EPS geofoam and sand. Geosynthetics Int 16(3):00001. https://doi.org/10.1680/gein.2009.16.3.216
Dave TN, Dasaka SM (2012) Transition of earth pressure on rigid retaining walls subjected to surcharge loading. Int J Geotech Eng 6(4):00001. https://doi.org/10.3328/IJGE.2012.06.04.427-435
AbdelSalam SS, Azzam SA (2016) Reduction of lateral pressures on retaining walls using geofoam inclusion. Geosynthetics Int. https://doi.org/10.1680/jgein.16.00005
Witthoeft AF, Kim H (2016) Numerical investigation of earth pressure reduction on buried pipes using EPS geofoam compressible inclusions. Geosynthetics Int 26(4):00001. https://doi.org/10.1680/jgein.15.00054
Purnanandam K, Rajagopal K (2008) Lateral earth pressure reduction due to controlled yielding technique. Indian Geotechnical J 38(3):317–333
Kim H, Choi B, Kim J (2010) Reduction of earth pressure on buried pipes by EPS geofoam inclusions. Geotech Test J 33(4):0001. https://doi.org/10.1520/GTJ102315
Srinivas FC (2014) Laboratory performance evaluation of bituminous mixes containing recycled asphalt pavement. Master’s thesis IITBomaby India
Stark TD, Arellano D, Horvath JS, Leshchinsky D (2004) Geofoam applications in the design and construction of highway embankments. NCHRPWeb Document 65, Transport Research Board, Washington, D.C.
ASTM (2010) Standard Test Method for compressive properties of rigid cellular plastics. ASTM D1621–10, West Conshohocken, PA
Trandafir AC, Erickson A, Moyles JF, Bartlett SF (2011) Confining stress effects on the stress-strain response of EPS geofoam in cyclic triaxial tests. Paper presented at the Geo-Frontiers, 2084–2091 p, https://doi.org/10.1061/41165(397)213
Yeo SS (2007) Evaluation of creep behavior of geosythetics using accelerated and conventional method. Ph.D. Thesis, Drexel University, PA
Yeo SS, Hsuan YG (2009) Effects of temperature and stress on the short- and long-term compressive behaviour of expanded polystyrene. Geosynthetics Int 16(5):374–383. https://doi.org/10.1680/gein.2009.16.5.374
Awol TA (2012) A parametric study of creep on EPS geofoam embankments. Norwegian university of science and technology, Master thesis
Birhan AG, Negussey D (2014) Effect of confinement on creep behaviour of EPS geofoam. Geotech Test J 37(6):1–8. https://doi.org/10.1520/GTJ20140010
Gnip IY, Vaitkus S, Kersulis V, Vejelei S (2008) Long-term prediction of compressive creep development in expanded polystyrene. Polym Test 27:378–391. https://doi.org/10.1016/j.polymertesting.2008.01.005
Duskov M (1997) Material research on EPS20 and EPS15 under representative conditions in pavement structures. Geotext Geomembr 15:147–181
Ossa A, Romo MP (2009) Micro- and macro-mechanical study of compressive behavior of expanded polystyrene (EPS) geofoam. Geosynthetics Int 16(5):327–338. https://doi.org/10.1680/gein.2009.16.5.327
Athanasopoulos GA, Pelekis PC, Xenaki VC (1999) Dynamic properties of EPS geofoam: An experimental Investigation. Geosynthetics Int 6(3):171–194. https://doi.org/10.1680/gein.6.0149
ASTM (2003) Standard test methods for the determination of the modulus and damping properties of soils using the cyclic triaxial apparatus. ASTM D3999-91 West Conshohocken, PA
Horvath JS (1995) Geofoam geosynthetics. Horvath Engineering, Scarsdale, NY
Horvath JS (2010) Lateral pressure reduction on earth-retaining structures using geofoams: correcting some misunderstandings. Paper presented at the ASCE, Geo-Institute ER2010: Earth retention conference 3, Washington, USA, https://doi.org/10.1061/41128(384)86
Bartlett S, Negussey D, Fransworth C, Stuedlein A (2011) Construction and long-term performance of transportation infrastructure constructed using EPS geofoam on soft soil sites in Salt lake valley, Utah. Presented at the 4th International conference on geofoam-EPS2011, Lillestorm, Norway, 10p
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Gade, V.K., Dasaka, S.M. (2019). Mechanical Properties of EPS Geofoam Under Various Loading Conditions. In: Arellano, D., Özer, A., Bartlett, S., Vaslestad, J. (eds) 5th International Conference on Geofoam Blocks in Construction Applications. Springer, Cham. https://doi.org/10.1007/978-3-319-78981-1_22
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