Engineering properties and microstructure of expansive soil treated with nanographite powder

Abstract

To reduce geological disasters caused by expansive soil, it is crucial to use a new type of modified material to rapidly improve soil strength instead of traditional soil improvement materials such as lime and cement. Nanographite powder (NGP) has excellent properties, such as high adsorption, conductivity, and lubrication, since it has the characteristics of small size, large specific surface area, and high surface energy. However, previous studies on the improvement of expansive soil with NGP are not processed enough. To study the improvement effect of NGP on expansive soil, non-load swelling ratio tests, consolidation tests, unconfined compressive strength tests, mercury injection tests, and micro-CT tests on expansive soil mixed with different NGP contents were performed. The results show that the non-load swelling ratio, mechanical properties, and porosity of expansive soil show some increasement after adding NGP. The strength of expansive soil reaches the maximum when the NGP content is 1.450%. The cumulative mercury volume and compressive strain of expansive soil reach the maximum with the 2.0% NGP content. Finally, the modification mechanism of swelling, compressibility, microstructure, and compressive strength of expansive soil by NGP is revealed.

Keywords

nanographite powder / expansive soil / engineering properties / microstructure / micro CT

References

[1] TiwariN, SatyamN. An experimental study on the behavior of lime and silica fume treated coir geotextile reinforced expansive soil subgrade [J]. Engineering Science and Technology: An International Journal, 2020, 23(5): 1214-1222

[2] BodnerG, SchollP, KaulH P. Field quantification of wetting-drying cycles to predict temporal changes of soil pore size distribution [J]. Soil and Tillage Research, 2013, 133: 1-9

[3] LiJ, CameronD A, RenG. Case study and back analysis of a residential building damaged by expansive soils [J]. Computers and Geotechnics, 2014, 56: 89-99

[4] NELSON J, MILLER D J. Expansive soils: Problems and practice in foundation and pavement engineering [M]. John Wiley & Sons, 1997.

[5] MathewsonC C. Expansive soils, engineering geology [J]. General Geology, 1988, 7: 114-119

[6] HorpibulsukS, RachanR, RaksachonY. Role of fly ash on strength and microstructure development in blended cement stabilized silty clay [J]. Soils and Foundations, 2009, 49(1): 85-98

[7] JhaA K, SivapullaiahP V. Mechanism of improvement in the strength and volume change behavior of lime stabilized soil [J]. Engineering Geology, 2015, 198: 53-64

[8] LinB, CeratoA B, MaddenA S, et al.. Effect of fly ash on the behavior of expansive soils: Microscopic analysis [J]. Environmental & Engineering Geoscience, 2013, 19(1): 85-94

[9] IjazN, DaiF-C, MengL-C, et al.. Integrating lignosulphonate and hydrated lime for the amelioration of expansive soil: A sustainable waste solution [J]. Journal of Cleaner Production, 2020, 254: 119985

[10] LiJ-Y, WangJ-M. Integrated life cycle assessment of improving saline-sodic soil with flue gas desulfurization gypsum [J]. Journal of Cleaner Production, 2018, 202332-341

[11] VaraprasadB J S, JayaprakashR J, SuryaprakashR J. Exploratory study on Argo-industrial wastes for improving geotechnical properties of expansive soil — As sustainable material [J]. Materials Today: Proceedings, 2021, 45: 6665-6673

[12] RafalkoS D, FilzG M, BrandonT L, et al.. Rapid chemical stabilization of soft clay soils [J]. Transportation Research Record: Journal of the Transportation Research Board, 2007, 2026(1): 39-46

[13] MengueE, MrouehH, LancelotL, et al.. Evaluation of the compressibility and compressive strength of a compacted cement treated laterite soil for road application [J]. Geotechnical and Geological Engineering, 2018, 36(6): 3831-3856

[14] IndirammaP, SudharaniC, NeedhidasanS. Utilization of fly ash and lime to stabilize the expansive soil and to sustain pollution free environment — An experimental study [J]. Materials Today: Proceedings, 2020, 22: 694-700

[15] KhadkaS D, JayawickramaP W, SenadheeraS, et al.. Stabilization of highly expansive soils containing sulfate using metakaolin and fly ash based geopolymer modified with lime and gypsum [J]. Transportation Geotechnics, 2020, 23: 100327

[16] LatifiN, MartoA, EisazadehA. Physicochemical behavior of tropical laterite soil stabilized with non-traditional additive [J]. Acta Geotechnica, 2016, 11(2): 433-443

[17] QiaoG-G, YuanD-J, LiuB. Experimental research on the engineering properties of foam-improved red clay soil [J]. Advanced Materials Research, 2011, 261–2631831-1835

[18] JozefaciukG, CzachorH. Impact of organic matter, iron oxides, alumina, silica and drying on mechanical and water stability of artificial soil aggregates. Assessment of new method to study water stability [J]. Geoderma, 2014, 221–222: 1-10

[19] ZhangM, ZhaoM-X, ZhangG-P, et al.. Calcium-free geopolymer as a stabilizer for sulfate-rich soils [J]. Applied Clay Science, 2015, 108: 199-207

[20] AtahuM K, SaathoffF, GebissaA. Strength and compressibility behaviors of expansive soil treated with coffee husk ash [J]. Journal of Rock Mechanics and Geotechnical Engineering, 2019, 11(2): 337-348

[21] LiuY-Y, ChangC W, NamdarA, et al.. Stabilization of expansive soil using cementing material from rice husk ash and calcium carbide residue [J]. Construction and Building Materials, 2019, 221: 1-11

[22] SelvakumarS, SoundaraB. Swelling behaviour of expansive soils with recycled geofoam granules column inclusion [J]. Geotextiles and Geomembranes, 2019, 47(1): 1-11

[23] MengT, QiangY-J, HuA-F, et al.. Effect of compound nano-CaCO₃ addition on strength development and microstructure of cement-stabilized soil in the marine environment [J]. Construction and Building Materials, 2017, 151: 775-781

[24] YaoK, WangW, LiN, et al.. Investigation on strength and microstructure characteristics of nano-MgO admixed with cemented soft soil [J]. Construction and Building Materials, 2019, 206: 160-168

[25] ChenY-Z, ZhouW-H, LiuF-M, et al.. Microstructure and morphological characterization of lead-contaminated clay with nanoscale zero-valent iron (nZVI) treatment [J]. Engineering Geology, 2019, 256: 84-92

[26] WashburnE W. Note on a method of determining the distribution of pore sizes in a porous material [J]. PNAS, 1921, 7(4): 115-116

[27] ZhengL-G, RutqvistJ, LiuH-H, et al.. Model evaluation of geochemically induced swelling/shrinkage in argillaceous formations for nuclear waste disposal [J]. Applied Clay Science, 2014, 97–98: 24-32

[28] LikosW J, LuN. Pore-scale analysis of bulk volume change from crystalline interlayer swelling in Na⁺- and Ca²⁺-smectite [J]. Clays and Clay Minerals, 2006, 54(4): 515-528

[29] TanL-R, KongL-WEngineering behavior of special rock and soil [M], 2006, Beijing, Science Press(in Chinese)

[30] LairdD A. Influence of layer charge on swelling of smectites [J]. Applied Clay Science, 2006, 34(1–4): 74-87

[31] ZhaoC-G, BaiBFundamentals of soil mechanics [M], 2009, Beijing, Beijing Jiaotong University Press(in Chinese)

[32] WenC, JinZ-H, LiuX-X, et al.. Synthesis of diamond using nano-graphite and Fe powder under high pressure and high temperature [J]. Materials Letters, 2006, 60(2930): 3507-3510

[33] PengZ, LiuX-J, ZhangW, et al.. Advances in the application, toxicity and degradation of carbon nanomaterials in environment: A review [J]. Environment International, 2020, 134: 105298

[34] AlmeidaJ C, CardosoC E D, TavaresD S, et al.. Chromium removal from contaminated waters using nanomaterials — A review [J]. TrAC Trends in Analytical Chemistry, 2019, 118277-291

[35] PérezS, FarréM L, BarcelóD. Analysis, behavior and ecotoxicity of carbon-based nanomaterials in the aquatic environment [J]. TrAC Trends in Analytical Chemistry, 2009, 28(6): 820-832

[36] ThinesR K, MubarakN M, NizamuddinS, et al.. Application potential of carbon nanomaterials in water and wastewater treatment: A review [J]. Journal of the Taiwan Institute of Chemical Engineers, 2017, 72: 116-133

[37] OtálvaroI F, NetoM P C, CaicedoB. Compressibility and microstructure of compacted laterites [J]. Transportation Geotechnics, 2015, 5: 20-34

[38] LinB-T, CeratoA B. Applications of SEM and ESEM in microstructural investigation of shale-weathered expansive soils along swelling-shrinkage cycles [J]. Engineering Geology, 2014, 177: 66-74

[39] MontesG, DuplayHJ, MartinezL, et al.. Swelling-shrinkage kinetics of MX80 bentonite [J]. Applied Clay Science, 2003, 22(6): 279-293

[40] BakerJ C, Grabowska-OlszewskaB, UwinsP J R. ESEM study of osmotic swelling of bentonite from Radzionkow (Poland) [J]. Applied Clay Science, 1995, 9(6): 465-469

[41] AnwarA, MohammedB S, WahabM A, et al.. Enhanced properties of cementitious composite tailored with graphene oxide nanomaterial — A review [J]. Developments in the Built Environment, 2020, 1100002

[42] GhasabkolaeiN, JanalizadehC A, RoshanN, et al.. Geotechnical properties of the soils modified with nanomaterials: A comprehensive review [J]. Archives of Civil and Mechanical Engineering, 2017, 17(3): 639-650