Dynamic Behavior of Coal Ash

Authors

  • Rajesh Pathak Thapar Institute of Engineering and Technology Patiala

DOI:

https://doi.org/10.37591/joge.v1i2.4030

Abstract

Coal ash is deposited in large quantities in the ash pond. It is used as structural fill and for dyke construction. The behavior of ash under dynamic conditions is not well investigated. The present work attempts to quantify some of the parameters, which influences the dynamic stability especially liquefaction potential of coal ash. Several investigations conducted on coal ash suggest that ash fills have low SPT value. This supports the susceptibility of coal ash to liquefaction. Under steady-state vibrations induced into saturated ash mass and sand on shake table, the pore water pressure at different depths has been monitored for varying relative density, amplitudes and number of cycles of motion corresponding to liquefaction. The investigations suggest that liquefaction of coal ash is governed by relative density, amplitude and frequency of dynamic disturbance and gradation.

 

Keywords: Coal ash, Ghagger Sand, Vibration Table, Liquefaction, Frequency

References

Cunningham J. A., Lukas R.G., Anderson T.C. Improvement of Fly ash and Slag - A Case Study, Geotechnical Practice for disposal of solid waste material, Michigan, Sp. Conf. 1977. ASCE. 169p.

Finn W.D., Emery, Gupta M.K. A Shaking Table Study of Liquefaction of Saturated Sands during Earthquakes, Third European Symposium on Earthquake Engg., Bulgaria. 1971. 253p.

Gandhi S.R., Ashim K. Dey, Selvan S. Blast Densification of Pond Ash, National Conf. on Fly Ash Disposal and Deposition: Beyond 2000 AD, IIT Kanpur. 1999. 139p.

Leonards G.A., Bailey, Bruce. Pulverised Coal Ash as Structural Fill, J. Geotech. Eng. Div. Proc. ASCE 1982; 108: GTA 517–531p.

Pathak R. Liquefaction of Saturated Sand, [M.E. Thesis], Civil Engg. TIET Patiala. 1993.

Sood V.K., Trivedi A., Bajpai P.K., et al. Report on Utilization of Fly Ash for Filling Low Lying Areas: Phase-I, Characterization and Feasibility Study, Submitted to Punjab State Council for Science and Technology. Chandigarh. 1996.

Sood V.K., Trivedi A., Pathak R. Liquefaction Characteristics of Ghagger Sand, Xth Symposium on Earthquake Engineering, Roorkee. 1994

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Published

2014-05-18

Issue

Vol. 1 No. 2 (2014)

Section

Articles

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