Abstract
The use of fly ash has been studied to investigate the strength properties of stabilized soils collected from two sites of Chittagong coastal region namely, Anwara and Banshkhali. In the present study unconfined compressive strength (qu), compaction properties and flexural properties has been studied. Compaction apparatus was employed to determine the strength of the stabilized soils. Strength tests were carried out on the specimens up to 28 days curing period. The investigated admixture was fly ash with lime; the amount of lime was fixed at 3 percent with the amount of fly ash 0, 6, 12 and 18 percent. The results from the experimental investigation shows that by increasing the amount of fly ash the strength properties of lime-fly ash stabilized soils improve. The use of fly ash with lime gave better strength and it may be more economical. For samples of both the coastal soils, compared with the untreated samples, unconfined compressive strength of fly ash and lime treated increased significantly, depending on the additive content and curing age. Compared with the untreated samples, flexural strength and modulus increased considerably, depending on the additive content. Compared with the untreated sample, the flexural strength and flexural modulus of fly ash treated samples increased up to about 4.6 and 4.7 times and 3 and 4.3 times respectively for both the soils. It could be concluded that fly ash stabilization of the coastal soils studied would be suitable for use in road construction.
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Ansary, M.A., Noor, M.A., Islam, M. (2007). Effect of Fly Ash Stabilization on Geotechnical Properties of Chittagong Coastal Soil. In: Ling, H.I., Callisto, L., Leshchinsky, D., Koseki, J. (eds) Soil Stress-Strain Behavior: Measurement, Modeling and Analysis. Solid Mechanics and Its Applications, vol 146. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6146-2_26
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DOI: https://doi.org/10.1007/978-1-4020-6146-2_26
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