Geomechanics and Engineering

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Geotechnical engineering behavior of biopolymer-treated soft marine soil

  • Kwon, Yeong-Man (Department of Civil Engineering, Korea Advanced Institute for Science and Technology) ;
  • Chang, Ilhan (School of Engineering and Information Technology, University of New South Wales (UNSW)) ;
  • Lee, Minhyeong (Department of Civil Engineering, Korea Advanced Institute for Science and Technology) ;
  • Cho, Gye-Chun (Department of Civil Engineering, Korea Advanced Institute for Science and Technology)
  • Received : 2018.10.10
  • Accepted : 2019.02.18
  • Published : 2019.04.10
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Abstract

Soft marine soil has high fine-grained soil content and in-situ water content. Thus, it has low shear strength and bearing capacity and is susceptible to a large settlement, which leads to difficulties with coastal infrastructure construction. Therefore, strength improvement and settlement control are essential considerations for construction on soft marine soil deposits. Biopolymers show their potential for improving soil stability, which can reduce the environmental drawbacks of conventional soil treatment. This study used two biopolymers, an anionic xanthan gum biopolymer and a cationic ${\varepsilon}-polylysine$ biopolymer, as representatives to enhance the geotechnical engineering properties of soft marine soil. Effects of the biopolymers on marine soil were analyzed through a series of experiments considering the Atterberg limits, shear strength at a constant water content, compressive strength in a dry condition, laboratory consolidation, and sedimentation. Xanthan gum treatment affects the Atterberg limits, shear strength, and compressive strength by interparticle bonding and the formation of a viscous hydrogel. However, xanthan gum delays the consolidation procedure and increases the compressibility of soils. While ${\varepsilon}-polylysine$ treatment does not affect compressive strength, it shows potential for coagulating soil particles in a suspension state. ${\varepsilon}-Polylysine$ forms bridges between soil particles, showing an increase in settling velocity and final sediment density. The results of this study show various potential applications of biopolymers. Xanthan gum biopolymer was identified as a soil strengthening material, while ${\varepsilon}-polylysine$ biopolymer can be applied as a soil-coagulating material.

Keywords

Acknowledgement

Supported by : Ministry of Land, Infrastructure, and Transport (MOLIT), National Research Foundation of Korea (NRF)

References

  1. Amezketa, E., Singer, M.J. and Le Bissonnais, Y. (1996), "Testing a new procedure for measuring water-stable aggregation", Soil Sci. Soc. Amer. J., 60(3), 888-894. https://doi.org/10.2136/sssaj1996.03615995006000030030x
  2. Angers, D.A. (1990), "Compression of agricultural soils from Quebec", Soil Till. Res., 18(4), 357-365. https://doi.org/10.1016/0167-1987(90)90120-3
  3. ASTM (2007), D4648-05: Standard Test Method for Laboratory Miniature Vane Shear Test for Saturated Fine-Grained Clayey Soil, ASTM, West Conshohocken, Pennsylvania, U.S.A.
  4. ASTM (2010), D2216-10: Standard Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass, ASTM International, West Conshohocken, Pennsylvania, U.S.A.
  5. ASTM (2011), D2435: Standard Test Methods for One-Dimensional Consolidation Properties of Soils Using Incremental Loading, ASTM International, West Conshohocken, Pennsylvania, U.S.A.
  6. ASTM (2014), D854-14: Standard Test Methods for Specific Gravity of Soil Solids by Water Pycnometer, ASTM International, West Conshohocken, Pennsylvania, U.S.A.
  7. ASTM (2017), D2487-17: Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System), ASTM International, West Conshohocken, Pennsylvania, U.S.A.
  8. ASTM (2017), D4318-17: Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils, ASTM International, West Conshohocken, Pennsylvania, U.S.A.
  9. ASTM (2017), D7928-17: Standard Test Method for Particle-Size Distribution (Gradation) of Fine-Grained Soils Using the Sedimentation (Hydrometer) Analysis, ASTM International, West Conshohocken, Pennsylvania, U.S.A.
  10. Ayeldeen, M.K., Negm, A.M. and El Sawwaf, M.A. (2016), "Evaluating the physical characteristics of biopolymer/soil mixtures", Arab. J. Geosci., 9(5), 1-13. https://doi.org/10.1007/s12517-015-2098-7
  11. Barrere, G.C., Barber, C.E. and Daniels, M.J. (1986), "Molecular cloning of genes involved in the production of the extracellular polysaccharide xanthan by Xanthomonas campestris pv. Campestris", Int. J. Biol. Macromolecul., 8(6), 372-374. https://doi.org/10.1016/0141-8130(86)90058-9
  12. Bate, B., Choo, H. and Burns, S.E. (2013), "Dynamic properties of fine-grained soils engineered with a controlled organic phase", Soil Dyn. Earthq. Eng., 53, 176-186. https://doi.org/10.1016/j.soildyn.2013.07.005
  13. Bergado, D., Sasanakul, I. and Horpibulsuk, S. (2003), "Electroosmotic consolidation of soft Bangkok clay using copper and carbon electrodes with PVD", Geotech. Test. J., 26(3), 277-288.
  14. Bo, M.W., Arulrajah, A., Horpibulsuk, S. and Leong, M. (2015), "Quality management of prefabricated vertical drain materials in mega land reclamation projects: A case study", Soil. Found., 55(4), 895-905. https://doi.org/10.1016/j.sandf.2015.06.019
  15. Bolto, B. and Gregory, J. (2007), "Organic polyelectrolytes in water treatment", Water Res., 41(11), 2301-2324. https://doi.org/10.1016/j.watres.2007.03.012
  16. Bouazza, A., Gates, W. and Ranjith, P. (2009), "Hydraulic conductivity of biopolymer-treated silty sand", Geotechnique, 59(1), 71-72. https://doi.org/10.1680/geot.2007.00137
  17. Brunori, F., Penzo, M.C. and Torri, D. (1989), "Soil shear strength: Its measurement and soil detachability", Catena, 16(1), 59-71. https://doi.org/10.1016/0341-8162(89)90004-0
  18. BSI, B. (1990), Methods of Test for Soils for Civil Engineering Purposes, British Standards Institution, Milton Keynes, U.K.
  19. Cabalar, A.F., Awraheem, M.H. and Khalaf, M.M. (2018), "Geotechnical properties of a low-plasticity clay with biopolymer", J. Mater. Civ. Eng., 30(8), 04018170. https://doi.org/10.1061/(ASCE)MT.1943-5533.0002380
  20. Cabalar, A.F., Wiszniewski, M. and Skutnik, Z. (2017), "Effects of xanthan gum biopolymer on the permeability, odometer, unconfined compressive and triaxial shear behavior of a sand", Soil Mech. Found. Eng., 54(5), 356-361. https://doi.org/10.1007/s11204-017-9481-1
  21. Cha, M., Santamarina, J.C., Kim, H.S. and Cho, G.C. (2014), "Small-strain stiffness, shear-wave velocity, and soil compressibility", J. Geotech. Geoenviron. Eng., 140(10), 06014011. https://doi.org/10.1061/(ASCE)GT.1943-5606.0001157
  22. Chai, J., Horpibulsuk, S., Shen, S. and Carter, J.P. (2014), "Consolidation analysis of clayey deposits under vacuum pressure with horizontal drains", Geotext. Geomembranes, 42(5), 437-444. https://doi.org/10.1016/j.geotexmem.2014.07.001
  23. Chang, I. and Cho, G.C. (2010), "A new alternative for estimation of geotechnical engineering parameters in reclaimed clays by using shear wave velocity", Geotech. Test. J., 33(3), 171-182.
  24. Chang, I. and Cho, G.C. (2012), "Strengthening of Korean residual soil with ${\beta}$-1,3/1,6-glucan biopolymer", Construct. Build. Mater., 30, 30-35. https://doi.org/10.1016/j.conbuildmat.2011.11.030
  25. Chang, I. and Cho, G.C. (2014), "Geotechnical behavior of a beta-1,3/1,6-glucan biopolymer-treated residual soil", Geomech. Eng., 7(6), 633-647. https://doi.org/10.12989/gae.2014.7.6.633
  26. Chang, I. and Cho, G.C. (2018), "Shear strength behavior and parameters of microbial gellan gum-treated soils: From sand to clay", Acta Geotechnica, 1-15.
  27. Chang, I., Im, J. and Cho, G.C. (2016), "Introduction of microbial biopolymers in soil treatment for future environmentallyfriendly and sustainable geotechnical engineering", Sustainability, 8(3), 251. https://doi.org/10.3390/su8030251
  28. Chang, I., Im, J., Prasidhi, A.K. and Cho, G.C. (2015), "Effects of Xanthan gum biopolymer on soil strengthening", Construct. Build. Mater., 74, 65-72. https://doi.org/10.1016/j.conbuildmat.2014.10.026
  29. Chang, I., Kwon, Y.M., Im, J. and Cho, G.C. (2018), "Soil consistency and inter-particle characteristics of xanthan gum biopolymer containing soils with pore-fluid variation", Can. Geotech. J.
  30. Chang, I., Prasidhi, A.K., Im, J. and Cho, G.C. (2015), "Soil strengthening using thermo-gelation biopolymers", Construct. Build. Mater., 77, 430-438. https://doi.org/10.1016/j.conbuildmat.2014.12.116
  31. Chang, S.S., Lu, W.Y.W., Park, S.H. and Kang, D.H. (2010), "Control of foodborne pathogens on ready-to-eat roast beef slurry by $\varepsilon$-polylysine", Int. J. Food Microbiol., 141(3), 236-241. https://doi.org/10.1016/j.ijfoodmicro.2010.05.021
  32. Darwin, R.F. and Tol, R.S.J. (2001), "Estimates of the economic effects of sea level rise", Environ. Resour. Econ., 19(2), 113-129. https://doi.org/10.1023/A:1011136417375
  33. Doerr, W. (1952), "Pneumoconiosis caused by cement dust", Virchows Archiv fur pathologische Anatomie und Physiologie und fur klinische Medizin, 322(4), 397-427. https://doi.org/10.1007/BF00957587
  34. Dolinar, B. and Trauner, L. (2007), "The impact of structure on the undrained shear strength of cohesive soils", Eng. Geol., 92(1-2), 88-96. https://doi.org/10.1016/j.enggeo.2007.04.003
  35. Dollimore, D. and Horridge, T.A. (1973), "The dependence of the flocculation behavior of china clay-polyacrylamide suspensions on the suspension pH", J. Colloid Interface Sci., 42(3), 581-588. https://doi.org/10.1016/0021-9797(73)90044-1
  36. Du, Y.J., Wei, M.L., Jin, F. and Liu, Z.B. (2013), "Stress-strain relation and strength characteristics of cement treated zinccontaminated clay", Eng. Geol., 167, 20-26. https://doi.org/10.1016/j.enggeo.2013.10.005
  37. Furst, E.M., Pagac, E.S. and Tilton, R.D. (1996), "Coadsorption of polylysine and the cationic surfactant cetyltrimethylammonium bromide on silica", Industr. Eng. Chem. Res., 35(5), 1566-1574. https://doi.org/10.1021/ie9506577
  38. Garcia-Ochoa, F., Santos, V.E., Casas, J.A. and Gomez, E. (2000), "Xanthan gum: Production, recovery, and properties", Biotechnol. Adv., 18(7), 549-579. https://doi.org/10.1016/S0734-9750(00)00050-1
  39. Garcia, M.C., Alfaro, M.C., Calero, N. and Munoz, J. (2011), "Influence of gellan gum concentration on the dynamic viscoelasticity and transient flow of fluid gels", Biochem. Eng. J., 55(2), 73-81. https://doi.org/10.1016/j.bej.2011.02.017
  40. Geornaras, I., Yoon, Y., Belk, K.E., Smith, G.C. and Sofos, J.N. (2007), "Antimicrobial activity of $\varepsilon$-Polylysine against escherichia coli O157:H7, salmonella typhimurium, and listeria monocytogenes in various food extracts", J. Food Sci., 72(8), M330-M334. https://doi.org/10.1111/j.1750-3841.2007.00510.x
  41. Greenwood, M.S. and Bamberger, J.A. (2002), "Measurement of viscosity and shear wave velocity of a liquid or slurry for online process control", Ultrasonics, 39(9), 623-630. https://doi.org/10.1016/S0041-624X(02)00372-4
  42. Hansbo, S. (1957), A New Approach to the Determination of the Shear Strength of Clay by the Fall-Cone Test, Royal Swedish Geotechnical Institute.
  43. He, J., Chu, J., Tan, S.K., Vu, T.T. and Lam, K.P. (2017), "Sedimentation behavior of flocculant-treated soil slurry", Mar. Georesour. Geotechnol., 35(5), 593-602. https://doi.org/10.1080/1064119X.2016.1177625
  44. Hiraki, J., Ichikawa, T., Ninomiya, S.I., Seki, H., Uohama, K., Seki, H., Kimura, S., Yanagimoto, Y. and Barnett, J.W. (2003), "Use of ADME studies to confirm the safety of $\varepsilon$-polylysine as a preservative in food", Regul. Toxicol. Pharm., 37(2), 328-340. https://doi.org/10.1016/S0273-2300(03)00029-1
  45. Horpibulsuk, S., Chinkulkijniwat, A., Cholphatsorn, A., Suebsuk, J. and Liu, M.D. (2012), "Consolidation behavior of soil-cement column improved ground", Comput. Geotech., 43, 37-50. https://doi.org/10.1016/j.compgeo.2012.02.003
  46. Horpibulsuk, S., Miura, N. and Bergado, D.T. (2004), "Undrained shear behavior of cement admixed clay at high water content", J. Geotech. Geoenviron. Eng., 130(10), 1096-1105. https://doi.org/10.1061/(ASCE)1090-0241(2004)130:10(1096)
  47. Ibanez, M., Chassagne, C., van Paassen, L. and Sittoni, L. (2015), Optimizing Dewatering and Soft Tailings Consolidation by Enhancing Tailings' Composition, in Tailings and Mine Waste, Vancounver, Canada.
  48. Im, J., Tran, A.T.P., Chang, I. and Cho, G.C. (2017), "Dynamic properties of gel-type biopolymer-treated sands evaluated by resonant column (RC) tests", Geomech. Eng., 12(5), 815-830. https://doi.org/10.12989/gae.2017.12.5.815
  49. Imai, G. (1980), "Settling behavior of clay suspension", Soil. Found., 20(2), 61-77. https://doi.org/10.3208/sandf1972.20.2_61
  50. Kennedy, J.F. (1984), "Production, properties and applications of xanthan", Prog. Ind. Microbiol., 19, 319-371.
  51. Kolaian, J.H. and Low, P.F. (2013), "Thermodynamic properties of water in suspensions of montmorillonite", Clay. Clay Miner., 9(1), 71-84. https://doi.org/10.1346/CCMN.1960.0090105
  52. Koumoto, T. and Houlsby, G.T. (2001), "Theory and practice of the fall cone test", Geotechnique, 51(8), 701-712. https://doi.org/10.1680/geot.2001.51.8.701
  53. Ku, T., Subramanian, S., Moon, S.W. and Jung, J. (2017), "Stress dependency of shear-wave velocity measurements in soils", J. Geotech. Geoenviron. Eng., 143(2), 04016092. https://doi.org/10.1061/(ASCE)GT.1943-5606.0001592
  54. Kwon, Y.M., Im, J., Chang, I. and Cho, G.C. (2017), "$\varepsilon$-polylysine biopolymer for coagulation of clay suspensions", Geomech. Eng., 12(5), 753-770. https://doi.org/10.12989/gae.2017.12.5.753
  55. Lado, M., Ben-Hur, M. and Shainberg, I. (2004), "Soil wetting and texture effects on aggregate stability, seal formation, and erosion", Soil Sci. Soc. Amer. J., 68(6), 1992-1999. https://doi.org/10.2136/sssaj2004.1992
  56. Latifi, N., Horpibulsuk, S., Meehan, C.L., Majid, M.Z.A. and Rashid, A.S.A. (2016), "Xanthan gum biopolymer: An ecofriendly additive for stabilization of tropical organic peat", Environ. Earth Sci., 75(9), 825. https://doi.org/10.1007/s12665-016-5643-0
  57. Lee, J.S., Seo, S.Y. and Lee, C. (2015), "Geotechnical and geophysical characteristics of muskeg samples from Alberta, Canada", Eng. Geol., 195, 135-141. https://doi.org/10.1016/j.enggeo.2015.04.030
  58. Lee, S., Chang, I., Chung, M.K., Kim, Y. and Kee, J. (2017), "Geotechnical shear behavior of xanthan gum biopolymer treated sand from direct shear testing", Geomech. Eng., 12(5), 831-847. https://doi.org/10.12989/gae.2017.12.5.831
  59. Locat, J. and Demers, D. (1988), "Viscosity, yield stress, remolded strength, and liquidity index relationships for sensitive clays", Can. Geotech. J., 25(4), 799-806. https://doi.org/10.1139/t88-088
  60. Locat, J., Berube, M.A. and Choquette, M. (1990), "Laboratory investigations on the lime stabilization of sensitive clays: Shear strength development", Can. Geotech. J., 27(3), 294-304. https://doi.org/10.1139/t90-040
  61. Martin, G., Yen, T. and Karimi, S. (1996), "Application of biopolymer technology in silty soil matrices to form impervious barriers", Proceedings of the 7th Australia New Zealand Conference on Geomechanics: Geomechanics in a Changing World, Adelaide, South Australia, July.
  62. Mazia, D., Schatten, G. and Sale, W. (1975), "Adhesion of cells to surfaces coated with polylysine. Applications to electron microscopy", J. Cell Biol., 66(1), 198-200. https://doi.org/10.1083/jcb.66.1.198
  63. Michaels, A.S. and Bolger, J.C. (1962), "Settling rates and sediment volumes of flocculated kaolin suspensions", Industr. Eng. Chem. Fund., 1(1), 24-33. https://doi.org/10.1021/i160001a004
  64. Mujah, D., Shahin, M.A. and Cheng, L. (2017), "State-of-the-art review of biocementation by microbially induced calcite precipitation (MICP) for soil stabilization", Geomicrobiol. J., 34(6), 524-537. https://doi.org/10.1080/01490451.2016.1225866
  65. Norman, L.E.J. (1958), "A comparison of values of liquid limit determined with apparatus having bases of different hardness", Geotechnique, 8(2), 79-83. https://doi.org/10.1680/geot.1958.8.2.79
  66. Nugent, R.A., Zhang, G. and Gambrell, R.P. (2009), "Effect of exopolymers on the liquid limit of clays and its engineering implications", Transport. Res. Rec., (2101), 34-43.
  67. Palomino, A.M. and Santamarina, J.C. (2005), "Fabric map for kaolinite: Effects of pH and ionic concentration on behavior", Clay. Clay Miner., 53(3), 211-223. https://doi.org/10.1346/CCMN.2005.0530302
  68. Pan, J.R., Huang, C., Chen, S. and Chung, Y.C. (1999), "Evaluation of a modified chitosan biopolymer for coagulation of colloidal particles", Colloid Surface. A Physicochem. Eng. Asp., 147(3), 359-364. https://doi.org/10.1016/S0927-7757(98)00588-3
  69. Park, T.G., Jeong, J.H. and Kim, S.W. (2006), "Current status of polymeric gene delivery systems", Adv. Drug Delivery Rev., 58(4), 467-486. https://doi.org/10.1016/j.addr.2006.03.007
  70. Petzold, G., Mende, M., Lunkwitz, K., Schwarz, S. and Buchhammer, H.M. (2003), "Higher efficiency in the flocculation of clay suspensions by using combinations of oppositely charged polyelectrolytes", Colloid Surface. A Physicochem. Eng. Asp., 218(1-3), 47-57. https://doi.org/10.1016/S0927-7757(02)00584-8
  71. Phetchuay, C., Horpibulsuk, S., Arulrajah, A., Suksiripattanapong, C. and Udomchai, A. (2016), "Strength development in soft marine clay stabilized by fly ash and calcium carbide residue based geopolymer", Appl. Clay Sci., 127, 134-142. https://doi.org/10.1016/j.clay.2016.04.005
  72. Qureshi, M.U., Chang, I. and Al-Sadarani, K. (2017), "Strength and durability characteristics of biopolymer-treated desert sand", Geomech. Eng., 12(5), 785-801. https://doi.org/10.12989/gae.2017.12.5.785
  73. Rijsberman, F. (1991), Potential Costs of Adapting to Sea Level Rise in OECD Countries, in Responding to Climate Change: Selected Economic Issues, 11-50.
  74. Rong, H., Qian, C. and Wang, R. (2011), "A cementation method of loose particles based on microbe-based cement", Sci. China Technol. Sci., 54(7), 1722-1729. https://doi.org/10.1007/s11431-011-4408-y
  75. Santamarina, J.C., Klein, K.A. and Fam, M.A. (2001), Soils and Waves, John Wiley & Sons,
  76. Sharma, B. and Bora Padma, K. (2003), "Plastic limit, liquid limit and undrained shear strength of soil-reappraisal", J. Geotech. Geoenviron. Eng., 129(8), 774-777. https://doi.org/10.1061/(ASCE)1090-0241(2003)129:8(774)
  77. Skempton, A.W. and Northey, R.D. (2008), The Sensitivity of Clays, in The Essence of Geotechnical Engineering: 60 years of Geotechnique, Thomas Telford Publishing.
  78. Trauner, L., Dolinar, B. and Misic, M. (2005), "Relationship between the undrained shear strength, water content, and mineralogical properties of fine-grained soils", Int. J. Geomech., 5(4), 350-355. https://doi.org/10.1061/(ASCE)1532-3641(2005)5:4(350)
  79. Vardanega, P.J. and Haigh, S.K. (2014), "The undrained strengthliquidity index relationship", Can. Geotech. J., 51(9), 1073-1086. https://doi.org/10.1139/cgj-2013-0169
  80. Voordouw, G. (2013), "Interaction of oil sands tailings particles with polymers and microbial cells: First steps toward reclamation to soil", Biopolymers, 99(4), 257-262. https://doi.org/10.1002/bip.22156
  81. Wang, Y.H. and Siu, W.K. (2006), "Structure characteristics and mechanical properties of kaolinite soils. I. Surface charges and structural characterizations", Can. Geotech. J., 43(6), 587-600. https://doi.org/10.1139/t06-026
  82. Wang, Z., Zhang, N., Cai, G., Jin, Y., Ding, N. and Shen, D. (2017), "Review of ground improvement using microbial induced carbonate precipitation (MICP)", Mar. Georesour. Geotechnol., 35(8), 1135-1146. https://doi.org/10.1080/1064119X.2017.1297877
  83. Wu, H.N., Shen, S.L., Ma, L., Yin, Z.Y. and Horpibulsuk, S. (2015), "Evaluation of the strength increase of marine clay under staged embankment loading: A case study", Mar. Georesour. Geotechnol., 33(6), 532-541. https://doi.org/10.1080/1064119X.2014.954180
  84. Yasuhara, H., Neupane, D., Hayashi, K. and Okamura, M. (2012), "Experiments and predictions of physical properties of sand cemented by enzymatically-induced carbonate precipitation", Soil. Found., 52(3), 539-549. https://doi.org/10.1016/j.sandf.2012.05.011
  85. Yin, J.H. and Fang, Z. (2006), "Physical modelling of consolidation behaviour of a composite foundation consisting of a cement-mixed soil column and untreated soft marine clay", Geotechnique, 56(1), 63-68. https://doi.org/10.1680/geot.2006.56.1.63
  86. Youssef, M.S. (1965), "Relationships between shear strength, consolidation, liquid limit, and plastic limit for remoulded clays", Proceedings of the 6th International Conference on Soil Mechanics and Foundation Engineering, Montreal, Canada, September.

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