Shear Behaviour of Loose and Compacted Pond Ash |
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Authors: | R S Jakka G V Ramana M Datta |
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Institution: | (1) Civil Engineering Department, Indian Institute of Technology Madras, Chennai, 600 036, India;(2) Civil Engineering Department, Indian Institute of Technology Delhi, New Delhi, 110016, India;(3) PEC University of Technology, Sector 12, Chandigarh, 160012, India |
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Abstract: | Massive utilization of pond ash in earth works requires thorough understanding of its geotechnical characteristics, especially
strength characteristics. Here in this paper, a detailed experimental study carried on the strength and other geotechnical
characteristics of pond ash samples, collected from inflow and outflow points of two ash ponds in India, are presented. Strength
characteristics were investigated using consolidated drained (CD) and undrained (
`(\textCU)] \overline{\text{CU}} ) triaxial tests with pore water pressure measurements, conducted on loose and compacted specimens of pond ash samples under
different confining pressures. Ash samples from inflow point exhibited behaviour similar to sandy soils in many respects.
They exhibited higher strengths than reference material (Yamuna sand), though their specific gravity and compacted maximum
dry densities are significantly lower than sands. Ash samples from outflow point exhibited significant differences in their
properties and values, compared to samples from inflow point. Shear strength of the ash samples from outflow point are observed
to be low, particularly in loose state where static liquefaction is observed. |
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Keywords: | |
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