Suitability of Fly Ash-Cement Kiln Dust Columns for Stabilizing Expansive (Black Cotton) Soils

Abstract

The paper focuses on the potential use of industrial wastes, which are fly ash (FA) and cement kiln dust (CKD), to stabilize expansive soils like black cotton (BC) soil for construction purposes. Although many soil stabilization methods exist, the placement of columns consisting of industrial wastes has yet to be tested. Knowing the pozzolanic action and mechanism between the waste product and the soil, this method of placing the industrial waste as a remedy should be trialled. Therefore, this paper proposes and investigates the placement of FA-CKD columns into the soil via a series of laboratory experiments using myriad mixtures and combinations of placement of such columns. The effect of molding water content and curing time on the BC soil’s consolidation and strength behavior was also assessed here. Through the experiments, it is found that the optimum mixture of FA-CKD for the columns is at 90–10%, respectively. This column mixture has been evidenced to improve the unconfined compressive strength of the soil significantly, where its performance improves with curing time. The highest strength improvement can be found at optimum moisture content, followed by wet of optimum and dry of optimum, respectively. By placing the columns in the soil with 4.5D spacing, better consolidation behavior with a reduced swelling potential of BC soil can be found. Based on the above findings, using FA-CKD columns can improve the BC soil’s engineering behavior, contributing to waste-to-wealth and sustainable soil stabilization approaches.

Keywords

ground improvement / molding water content / swell pressure / swell potential / unconfined compressive strength (UCS)

References

[1] Ramaswamy, S. V., & Anirudhan, I. V. (2009). Experience with expansive soils and shales in and around Chennai. In Indian Geotechnical Conference, 2, 873-881.

[2] Anburuvel, A. (2024). The engineering behind soil stabilization with additives: A state-of-the-art review. Geotechnical and Geological Engineering, 42, 1-42. https://doi.org/10.1007/s10706-023-02554-x

[3] Ly, A., & El-Sayegh, Z. (2023). Tire wear and pollutants: An overview of research. Archives of Advanced Engineering Science, 1(1), 2-10. https://doi.org/10.47852/bonviewAAES32021329

[4] Turan, C., Javadi, A. A., Vinai, R., & Beig Zali, R. (2022). Geotechnical characteristics of fine-grained soils stabilized with fly ash, a review. Sustainability, 14(24), 16710. https://doi.org/10.3390/su142416710

[5] Zada, U., Jamal, A., Iqbal, M., Eldin, S. M., Almoshaogeh, M., Bekkouche, S. R., & Almuaythir, S. (2023). Recent advances in expansive soil stabilization using admixtures: Current challenges and opportunities. Case Studies in Construction Materials, 18, e01985. https://doi.org/10.1016/j.cscm.2023.e01985

[6] Ziar, A., Ulfat, S., Serat, Z., & Armal, M. A. (2024). Cost effectiveness analysis of design methods for rigid and flexible pavement: A case study of urban road. Archives of Advanced Engineering Science, 2(3), 134-141. https://doi.org/10.47852/bonviewAAES32021264

[7] Juneja, A., & Mir, B. A. (2012). Behaviour of clay reinforced by sand compaction pile with smear. Proceedings of the Institution of Civil Engineers - Ground Improvement, 165(2), 111-124. https://doi.org/10.1680/grim.10.00020

[8] Ramesh, H. N., Kulkarni, M. G. R., Raghunandan, M. E., & Nethravathi, S. (2022). Suitability of bagasse ash-lime mixture for the stabilization of black cotton soil. Geomechanics and Engineering, 28(3), 255-263. https://doi.org/10.12989/gae.2022.28.3.255

[9] Salahudeen, A. B., Eberemu, A. O., & Osinubi, K. J. (2014). Assessment of cement kiln dust-treated expansive soil for the construction of flexible pavements. Geotechnical and Geological Engineering, 32, 923-931. https://doi.org/10.1007/s10706-014-9769-0

[10] Renuka, B. K., Pankaja, B. S., Ramesh, H. N., & Raghunandan, M. E. (2022). Effect of silica fume−cement kiln dust columns on the strength and compressibility of black cotton soil. Indian Geotechnical Journal, 52, 979-988. https://doi.org/10.1007/s40098-022-00626-y

[11] Sharma, R. K. (2017). Laboratory study on stabilization of clayey soil with cement kiln dust and fiber. Geotechnical and Geological Engineering, 35, 2291-2302. https://doi.org/10.1007/s10706-017-0245-5

[12] Phanikumar, B. R., Mani, A. J., Sathiyasheelan, S., & Rajesh Reddy, P. (2009). Fly ash columns (FAC) as an innovative foundation technique for expansive clay beds. Geomechanics and Geoengineering, 4(3), 183-188. https://doi.org/10.1080/17486020902857007

[13] Çokça, E. (2001). Use of class C fly ashes for the stabilization of an expansive soil. Journal of Geotechnical and Geoenvironmental Engineering, 127(7), 568-573. https://doi.org/10.1061/(ASCE)1090-0241(2001)127:7(568)

[14] Mitchell, T. K., & Raad, L. (1973). Control of volume changes in expansive earth materials. In Proceedings of Workshop on Expansive Clays and Shales in Highway Design and Construction, 2, 200-219.

[15] Eberemu, A. O., Osinubi, K. J., Ijimdiya, T. S., & Sani, J. E. (2019). Cement kiln dust: Locust bean waste ash blend stabilization of tropical black clay for road construction. Geotechnical and Geological Engineering, 37, 3459-3468. https://doi.org/10.1007/s10706-018-00794-w

[16] Yoobanpot, N., Jamsawang, P., & Horpibulsuk, S. (2017). Strength behavior and microstructural characteristics of soft clay stabilized with cement kiln dust and fly ash residue. Applied Clay Science, 141, 146-156. https://doi.org/10.1016/j.clay.2017.02.028

[17] Rimal, S., Poudel, R. K., & Gautam, D. (2019). Experimental study on properties of natural soils treated with cement kiln dust. Case Studies in Construction Materials, 10, e00223. https://doi.org/10.1016/j.cscm.2019.e00223

[18] Ramesh, H. N., & Rakesh, C. (2020). Influence of lime sludge and sodium salts on the strength and structural behavior of clayey soils-granite stone slurry dust composite with curing. Indian Geotechnical Journal, 50, 801-809. https://doi.org/10.1007/s40098-019-00404-3

[19] Almuaythir, S., & Abbas, M. F. (2023). Expansive soil remediation using cement kiln dust as stabilizer. Case Studies in Construction Materials, 18, e01983. https://doi.org/10.1016/j.cscm.2023.e01983

[20] Amadi, A. A., & Osu, A. S. (2018). Effect of curing time on strength development in black cotton soil - Quarry fines composite stabilized with cement kiln dust (CKD). Journal of King Saud University - Engineering Sciences, 30(4), 305-312. https://doi.org/10.1016/j.jksues.2016.04.001

[21] Miller, G. A., Azad, S., & Dhar, B. (1997). The effect of cement kiln dust on the collapse potential of compacted shale. In M. A. Wasemiller & K. B. Hoddinott (Eds.), Testing soil mixed with waste or recycled materials (pp. 232-245). ASTM International.