EVALUATION OF ENGINEERING PROPERTIES OF THERMAL POWER PLANT WASTE FOR SUBGRADE TREATMENT
DOI:
https://doi.org/10.33736/jcest.3975.2021Keywords:
cohesive soils, fly ash, X-ray fluorescence, subgrade improvement, CBRAbstract
Soft cohesive soils have low strength, high plasticity, and a large expansion ratio making them unsuitable as a road subgrade. This study aims to evaluate the potential of power plant waste (fly ash) from the Barapukuria Thermal Power Plant, Dinajpur, Bangladesh to improve the characteristics of such soft cohesive soil. X-ray fluorescence test conducted to classify the power plant fly ash and the type was identified as “Class F” according to “American Association of State Highway and Transportation Officials” and "American Society for Testing and Materials". Laboratory tests were conducted on clay soil obtained from Dinajpur region modified by the collected power plant waste. As the Class F fly ash has low cementing property, 3% cement was added with it. Cement mixed soil was modified with 5%, 10%, 15%, and 20% fly ash respectively. Specific Gravity, Atterberg limits, Modified Proctor Compaction, Unconfined Compressive Strength (UCS) and California Bearing Ratio (CBR) tests were conducted. The study reveals that there is a decrease in specific gravity, dry density, and plasticity index with the addition of power plant waste. On the other hand, there is an increase in optimum moisture content, UCS, and CBR value. UCS and CBR values were found to be improved remarkably. Soaked CBR value of soil is found to be improved from 2.79% to 92.59% when treated with 5% fly ash and 3% cement. The UCS value of this modified soil was 560.36 kPa. The stabilized soil thus obtained meets the requirements for subgrade as specified by the Local Government Engineering Department (LGED)’s design manual (2005), Bangladesh. Since there is a possibility of leaching by dumping a large quantity of fly ash in the pond, the use of fly ash from the power plants to improve soft cohesive soils for road subgrade may be an environment-friendly alternative to its disposal in the ponds.
References
Howladar, M.F. & Islam, M.R. (2016). A study on physico-chemical properties and uses of coal ash of Barapukuria Coal Fired Thermal Power Plant, Dinajpur, for environmental sustainability Energy. Ecology and Environment, 1, 233-247.
https://doi.org/10.1007/s40974-016-0022-y
Hossain, M.B., Kumruzzaman, M. & Roknuzzaman, M. (2018). Study of Engineering Behavior of Coal Mine Waste Collected from Barapukuria Coal Mine as Road Subgrade. Journal of Civil Engineering, Science and Technology (JCEST), 9(1), 58-69.
https://doi.org/10.33736/jcest.884.2018
Ferguson, G. (1993). Use of self-cementing fly ashes as a soil stabilization agent Fly Ash for Soil Improvement. ASCE Geotechnical Special Publication, No 36.
Senol,A., Edil, T.B., Bin-Shafique, M.S., Acosta, H.A. & Benson, C.H. (2006). Soft subgrades' stabilization by using various fly ashes Resources. Conservation and Recycling, 46, 365-376.
https://doi.org/10.1016/j.resconrec.2005.08.005
Amrani, M., Taha, Y., El Haloui, Y., Benzaazoua, M. & Hakkou, R. (2020). Sustainable Reuse of Coal Mine Waste: Experimental and Economic Assessments for Embankments and Pavement Layer Applications in Morocco. Minerals 2020, 10, 851.
https://doi.org/10.3390/min10100851
Dockter, B.A., Eylands, K.E. & Hamre, L.L. (1999). Use of bottom ash and fly ash in rammed-earth construction. In International Ash Utilization Symposium.
Eskioglou, P. & Oikonomou, N. (2008). Protection of environment by the use of fly ash in road construction. Global NEST Journal, 10(1), 108-113.
https://doi.org/10.30955/gnj.000442
Kolias, S., Kasselouri-Rigopoulou, V. & Karahalios, A. (2005). Stabilisation of clayey soils with high calcium fly ash and cement. Cement and Concrete Composites, 27, 301-313.
https://doi.org/10.1016/j.cemconcomp.2004.02.019
Cetin, B. & Aydilek, A. H. (2013). pH and fly ash type effect on trace metal leaching from embankment soils. Resources, Conservation and Recycling, 80, 107-117. https://doi.org/10.1016/j.resconrec.2013.09.006
Karami, H., Pooni, J., Robert, D., Costa, S., Li, J., & Setunge, S. (2021). Use of secondary additives in fly ash based soil stabilization for soft subgrades. Transportation Geotechnics, 29, 100585.
https://doi.org/10.1016/j.trgeo.2021.100585
Kaniraj, S. R. & Havanagi, V. G. (1999). Compressive strength of cement stabilized fly ash-soil mixtures. Cement and Concrete Research. 29:673-677.
https://doi.org/10.1016/S0008-8846(99)00018-6
Vukićević, M., Pujević, V., Marjanović, M., Jocković, S. & Maraš-Dragojević, S. (2015). Fine grained soil stabilization using class F fly ash with and without cement. In XVI European Conference on Soil Mechanics and Geotechnical Engineering, Edinburg. http://dx.doi.org/10.1680/ecsmge.60678.vol1.001
ASTM D 854 (2014). Standard test methods for specific gravity of soil solids by water pycnometer ASTM International, West Conshohocken, PA.
https://doi.org/10.1520/D0854-14
ASTM D 422-63(2007). Standard Test Method for Particle-Size Analysis of Soils (Withdrawn 2016), ASTM International, West Conshohocken, PA.
https://doi.org/10.1520/D0422-63R07E02
ASTM D 4318-17 (2017). e1 Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils, ASTM International, West Conshohocken, PA.
https://doi.org/10.1520/D4318-17E01
ASTM D 1557 (2007). Standard test methods for laboratory compaction characteristics of soil using modified effort, ASTM International, West Conshohocken, PA.
https://doi.org/10.1520/D1557-07
Zha, F., Liu, S., Du, Y. & Cui, K. (2008). Behavior of expansive soils stabilized with fly ash. Natural hazards, 47, 509-523.
https://doi.org/10.1007/s11069-008-9236-4
AASHTO T 193 (1999). Standard method of test for the California bearing ratio Standard Specifications for Transportation Materials and Methods of Sampling and Testing, American Association of State Highway and Transportation Officials (AASHTO), Washington DC.
ASTM C 618 (2019). Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolana for Use in Concrete, ASTM International, West Conshohocken, PA.
Kumar, A., Walia, B.S., Bajaj, A. (2007). Influence of fly ash, lime, and polyester fibers on compaction and strength properties of expansive soil. Journal of materials in civil engineering, 19, 242-248.
https://doi.org/10.1061/(ASCE)0899-1561(2007)19:3(242)
Sharma, A.K. & Sivapullaiah, P.V. (2016). Strength development in fly ash and slag mixtures with lime. Proceedings of the Institution of Civil Engineers-Ground Improvement, 169, 194-205.
https://doi.org/10.1680/jgrim.14.00024
Kumar, B. R. P. & Sharma, R. S. (2004). Effect of fly ash on engineering properties of expansive soils. Journal of Geotechnical and Geoenvironmental Engineering, 130(7), 764-767.
https://doi.org/10.1061/(ASCE)1090-0241(2004)130:7(764)
Das, S. K. & Parhi, P. S. (2013). Stabilization of expansive soil using alkali activated fly ash. Paper presented at the Proceeding of Indian Geotechnical Conference.
Cokca, E. (2001). Use of class c fly ashes for the stabilizationof an expansive soil. Journal of Geotechnical and Geoenvironmental Engineering, 127, 568-573.
https://doi.org/10.1061/(ASCE)1090-0241(2001)127:7(568)
Parsons, R. & Kneebone, E. (2005). Field performance of fly ash stabilised subgrades. Proceedings of the Institution of Civil Engineers-Ground Improvement, 9, 33-38.
https://doi.org/10.1680/grim.2005.9.1.33
Burmister, D.M. (1949). Principles and techniques of soil identification. In: Proceedings of Annual Highway Research Board Meeting. National Research Council. Washington, DC, 1949. pp 402-434. https://trid.trb.org/view/121582
Al-Naje, F. Q., Abed, A. H., & Al-Taie, A. J. (2021, June). Compaction characteristics of natural cohesive subgrade soil stabilized with local sustainable materials. In IOP Conference Series: Materials Science and Engineering (Vol. 1105, No. 1, p. 012085). IOP Publishing.
https://doi.org/10.1088/1757-899X/1105/1/012085
Santos, F., Li, L., Li, Y. & Amini, F. (2011). Geotechnical properties of fly ash and soil mixtures for use in highway embankments. In: Proc. of the World of Coal Ash (WOCA) Conference, Denver, USA, 2011. pp 125-136. www.flyash.info
Shirin, M. S., Islam, M. M., & Kumruzzaman, M. (2020). Stabilization of Coal Mine Waste and Its Practical Application as a Road Subgrade. American Journal of Traffic and Transportation Engineering, 5(5), 51-56.
https://doi.org/10.11648/j.ajtte.20200505.11
Bell, F.G. (1996). Lime stabilization of clay minerals and soils. Engineering geology, 42, 223-237.
https://doi.org/10.1016/0013-7952(96)00028-2
Ponnada, S., Rao, K. R., & Raju, S. G. (2021). Subgrade CBR improvement with fly ash as mineral and NaOH as a chemical admixture. In IOP Conference Series: Materials Science and Engineering (Vol. 1025, No. 1, p. 012011). IOP Publishing.
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