Effect of crushing and strain rate on mechanical behavior of type-F fly ash

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dc.contributor.author Gupta, Kanika
dc.contributor.author Sachan, Ajanta
dc.date.accessioned 2017-12-06T05:29:05Z
dc.date.available 2017-12-06T05:29:05Z
dc.date.issued 2018-03
dc.identifier.citation Gupta, Kanika and Sachan, Ajanta, "Effect of crushing and strain rate on mechanical behavior of type-F fly ash", Transportation Infrastructure Geotechnology, DOI: 10.1007/s40515-017-0044-8,vol.5, no.1, pp.4-23, Mar. 2018. en_US
dc.identifier.issn 2196-7202
dc.identifier.issn 2196-7210
dc.identifier.uri http://dx.doi.org/10.1007/s40515-017-0044-8
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/3313
dc.description.abstract Fly ash is a by-product of coal combustion from thermal power plant. It comprises of hollow spherical silt size particles with low specific gravity. The increased use of fly ash in highway/railway embankment construction as a structural fill material raises the need to study its mechanical behavior in detail. Although it has been reported that fly ash particles are susceptible to breakage, the effect of crushing on mechanical behavior of fly ash is yet to be explored. The current experimental research was conducted on type-F fly ash to study the following: (a) effect of crushing of fly ash particles on its macroscopic and microscopic behavior and (b) effect of strain rate on pore pressure evolution and stress-strain response of fly ash (uncrushed). Macroscopic (shear strength, compressibility, compaction behavior) and microscopic (particle's shape and size using SEM images) tests were performed on fly ash to study the crushing effect. Strain rate effect on pore pressure and stress-strain response of uncrushed fly ash was studied by performing CU triaxial tests at different loading rates (0.005-9% per min). Macroscopic response of fly ash exhibited that higher crushing reduced shear strength and compressibility of fly ash and improved its compaction behavior. Microscopic response indicated deformation and breakage of fly ash particles due to crushing. Strain rate study showed large negative pore pressure generation along with brittle stress-strain response of uncrushed fly ash at 9% per min as compared to lower strain rates.
dc.description.statementofresponsibility by Kanika Gupta and Ajanta Sachan
dc.format.extent vol.5, no.1, pp.4-23
dc.language.iso en en_US
dc.publisher Springer Verlag en_US
dc.subject Fly ash en_US
dc.subject Cenospheres en_US
dc.subject Plerospheres en_US
dc.subject Crushing en_US
dc.subject Strain rate en_US
dc.subject Pore pressure en_US
dc.title Effect of crushing and strain rate on mechanical behavior of type-F fly ash en_US
dc.type Article en_US
dc.relation.journal Transportation Infrastructure Geotechnology

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