Open Access Open Access  Restricted Access Subscription Access

Laboratory Study on Engineering Properties of Organic Soil Stabilized with Fly Ash

M. S. Shirin, Fatima Johora, Shajahan Ali, M. S. Hashi

Abstract


Organic soil is considered as an unfavorable soil for construction. It has high water content, lower solid content, high compressibility and low strength. In case of construction of structures on organic soil, it involves the risk of ground failure and extreme settlement. Due to these reasons stabilization of organic soil is necessary before construction of any structure. This study investigates the influence of fly ash addition on the behavior of organic soils with varying organic contents. The soil is stabilized with the addition of different percentages fly ash such as 10%, 20% and 30%. 10% cement and inorganic silt was also used to stabilize the soils for comparison with fly ash. The increase in strength and stiffness depends on the pozzolanic reactions, water content, characteristics of fly ash, organic content of the soil. Soil organic content is a detrimental characteristic for stabilization. The strength properties were determined by unconfined compression test. The strength of stabilized soil was compared with untreated soil and it was found that the strength was increased. The strength gained because of fly ash was not as much as that of cement but it was greater than strength gained because of inorganic silt or the untreated soil.

Full Text:

PDF

References


Acosta, H. A., Edil, T. B., & Benson, C. H. (2003). Soil stabilization and drying using fly ash. University of Wisconsin, Department of Civil and Environment Enginnering. Madison, W.I.: Geo Engineering Report No. 03-03.

Alamgir, M., Zaher, S. M., Haque, M. A., & Kabir, M. H. (2001). Performance of some ground improvement methods recently practiced in the soft ground of Bangladesh. Indore, India: Proceedings of the Indian Geotechnical Conference.

Abboud, M. M. (1973). Mechanical properties of cement-treated soils in relation to their use in embankment construction. C.A.: Ph. D. Dissertation, University of California, Berkeley.

Alamgir, M., Rafizul, I. M., & Bashar, M. A. (2006). Physical Properties of Reconstitued Organic Soils at Khulna Region of Bangladesh. Vancouver, Canada: 59th Canadian Geotechnical Conference, pp 1-6.

Ahnberg, H. (2006). Strength of stabilised soils. A laboratory study on clays and organic soils stabilised with different types of binder. Lund: Lund University.

Bowles, J. E. (1979). Physical and geotechnical properties of soils. New Jersey: McGraw-Hill.

ASTM. (2007). D698, Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort (12 400 ft-lbf/ft3 (600 kN-m/m3)). West Conshohocken, PA: ASTM International.

Das, B. (2002). Principles of Geotechnological Engineering (5th ed.).


Refbacks

  • There are currently no refbacks.