Enhancement of geotechnical properties of municipal sewage sludge for sustainable utilization as engineering construction material

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dc.contributor.author Taki, Kaling
dc.contributor.author Choudhary, Saurabh
dc.contributor.author Gupta, Sharad
dc.contributor.author Kumar, Manish
dc.date.accessioned 2019-12-30T10:09:24Z
dc.date.available 2019-12-30T10:09:24Z
dc.date.issued 2020-04
dc.identifier.citation Taki, Kaling; Choudhary, Saurabh; Gupta, Sharad and Kumar, Manish, "Enhancement of geotechnical properties of municipal sewage sludge for sustainable utilization as engineering construction material", Journal of Cleaner Production, DOI: 10.1016/j.jclepro.2019.119723, vol. 251, Apr. 2020. en_US
dc.identifier.issn 0959-6526
dc.identifier.issn 1879-1786
dc.identifier.uri https://doi.org/10.1016/j.jclepro.2019.119723
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/5052
dc.description.abstract The present study demonstrates potential utilization of lime-stabilized sewage sludge (SS) for construction purposes. SS samples were constituted using 0, 2, 4, 6 and 8% of lime by weight of the SS and cured for 7, 14 and 28 d. Stability of the lime-modified SS was evaluated through determination of geotechnical, microstructural and mineralogical properties. A large improvement in unconfined compressive strength (UCS) from 207 kPa to 1102 kPa was achieved after 28 d of curing SS with 6% lime. The improvement in UCS is attributed to formation of cementing compounds as a result of pozzolanic reactions. Marked reductions in swell pressure of 47, 51, 54 and 58% were obtained with the 2, 4, 6 and 8% lime treatments. Also, the plasticity index decreased with increasing lime content for different curing periods, indicating the SS becomes much more workable and less expansive. Scanning electron microscopy (SEM), X-ray diffraction (XRD), Thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FTIR) after lime treatment confirmed formation of the new compounds responsible for the improved engineering properties of SS. The study concludes that lime treatment can be an alternative to stabilize SS for potential use as a construction material for subbase of flexible pavement as per IRC (Indian Road Congress) 37�2012 guidelines.
dc.description.statementofresponsibility by Kaling Taki, Saurabh Choudhary, Sharad Gupta and Manish Kumar
dc.language.iso en_US en_US
dc.publisher Elsevier en_US
dc.subject Sewage sludge en_US
dc.subject Lime en_US
dc.subject Treatment en_US
dc.subject Pozzolanic en_US
dc.subject Shear strength en_US
dc.title Enhancement of geotechnical properties of municipal sewage sludge for sustainable utilization as engineering construction material en_US
dc.type Article en_US
dc.relation.journal Journal of Cleaner Production


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