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dc.contributor.authorVashistha P.-
dc.contributor.authorSingh S.K.-
dc.contributor.authorDutt, Dharm-
dc.contributor.authorKumar V.-
dc.identifier.citationJournal of Cleaner Production (2019), 224(): 557-565-
dc.description.abstractThe industrial solid waste generation and its stockpile disposal have major environmental consequences. These consequences could be minimized through the solid waste application as a raw material in other industries. The current study focusses on the utilization of lime sludge with boiler ash synthesized nanosilica for production of belite based clinker at relatively lower temperature. Lime sludge was also used in combination with fly ash and boiler ash to check the synthesis of compounds at varying temperatures. Nanosilica was synthesized from pretreated boiler ash through alkali treatment and acid precipitation. The synthesized nanosilica has been characterized for specific surface area, crystallinity, surface functional groups and size. Three different mixtures, containing lime sludge with nanosilica, fly ash, and boiler ash are fired at temperatures ranging from 900 °C to 1200 °C and characterized for the synthesis of belite. Conventionally, belite is synthesized above 1200 °C, whereas the combined application of lime sludge and nanosilica reduces the temperature of belite synthesis to 900 °C without pre calcination or addition of any chemical stabilizer. In the case of lime sludge and boiler ash blend, belite formation takes place at the higher temperature (1100–1200 °C). Anorthite synthesis takes place in case of lime sludge and fly ash blend, due to high percentage of alumina present in fly ash. Lime sludge and nanosilica based belite clinker are used to develop newer cementitious binder. Hydration and strength properties of developed binder proved worthy as building materials. This study will present alternatives for sustainable utilization of lime sludge, fly ash and boiler ash in construction. © 2019 Elsevier Ltd-
dc.publisherElsevier Ltd-
dc.relation.ispartofJournal of Cleaner Production-
dc.subjectBoiler ash-
dc.subjectFly ash-
dc.subjectLime sludge-
dc.subjectNano silica-
dc.subjectSolid waste-
dc.titleSustainable utilization of paper mill solid wastes via synthesis of nano silica for production of belite based clinker-
dc.affiliationVashistha, P., Indian Institute of Technology, Roorkee, India-
dc.affiliationSingh, S.K., CSIR-Central Building Research Institute, Roorkee, India-
dc.affiliationDutt, D., Indian Institute of Technology, Roorkee, India-
dc.affiliationKumar, V., Indian Institute of Technology, Delhi, India-
dc.description.fundingThis research studies was financially supported by Department of Science & Technology (Government of India) and M/s Ruchira Paper Industry Kalaamb Himachal Pradesh (India) . The funding was provided under the scheme of Uchatar Aviskar Yojana (UAY) with award number UAY-1012 DPT . The authors would like to thank the staff of Indian Institute of Technology (IIT) Roorkee and CSIR-Central Building Research Institute, Roorkee for the support in successful completion of the work.-
dc.description.correspondingauthorKumar, V.; Centre for Rural Development & Technology, Indian Institute of Technology DelhiIndia; email:
Appears in Collections:Journal Publications [PT]

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