Bearing capacity of soft soil model treated with end-bearing bottom ash columns |
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Authors: | Razieh Moradi Aminaton Marto Ahmad Safuan A. Rashid Mohammad Moeen Moradi Abideen Adekunle Ganiyu Suksun Horpibulsuk |
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Affiliation: | 1.Department of Geotechnics and Transportation,Universiti Teknologi Malaysia,Skudai,Malaysia;2.Department of Environmental and Green Technology (EGT), Malaysian-Japan International Institute of Technology,Universiti Teknologi Malaysia,Skudai,Malaysia;3.Department of Geotechnics and Transportation,Universiti Teknologi Malaysia,Skudai,Malaysia;4.Centre of Tropical Geoengineering (GEOTROPIK), Faculty of Civil Engineering,Universiti Teknologi Malaysia,Skudai,Malaysia;5.Oloom Tahghighat University,Shiraz,Iran;6.Department of Civil Engineering and Quantity Surveying,Military Technological College,Muscat,Sultanate of Oman;7.School of Civil Engineering, Center of Excellence in Innovation for?Sustainable Infrastructure Development,Suranaree University of Technology,Nakhon Ratchasima,Thailand |
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Abstract: | Granular column technique is a soil improvement method used to increase the bearing capacity of a soft soil area by replacing the soil with a group of granular column materials. The by-product utilisation is a worldwide interest for sustainable infrastructure development. Bottom ash, which is a combustion deposit derived from coal burning, is a potential by-product that could be used alternatively to sand or aggregate as a green granular column material. This research is to study the potential use of the bottom ash column-improved soft clay by conducting a series of small-scale physical modelling test. The bearing capacity behaviour and failure mode of soft clay improved with end-bearing group of bottom ash columns with and without geotextile encasement are investigated. The bearing capacity of soft clay is significantly enhanced by the inclusion of bottom ash columns; that is, 239% of bearing capacity improvement is observed with only 13% of improvement area. The bulging of the bottom ash column is transferred to buckling failure with higher bearing capacity when the bottom ash column is encased by geotextile. The outcome of this research leads to the usage of bottom ash by-product as a granular column material in sustainable soil improvement technique. |
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