Name :   Dr.Sanjay Kumar

Designation :   Chief Scientist & Head, Metal Extraction & Recycling Division, Professor, AcSIR

Contact Information :

• Email id :  sunju@nml.res.in
• Mobile/Phone no:  09939326346, +91 657 2345244, +91 657 2345242

Educational Qualification :   Ph.D 'Tech'

Areas of Expertise :   Recycling & Waste Utilization, Strategic Metals, Cement & geopolymers, Mechanochemistry

No. of Papers Published :   130

• International :   Book Edited 1. Edited the book “Ecoefficient masonry bricks and blocks: Design, properties and durability” published by Woodhed Publishing, Dec 2014, Elsevier Book Chapters 1. The properties & performance of red mud based geopolymeric masonry blocks, Sanjay Kumar, Invited chapter in In : Ecoefficient masonry bricks and blocks: Design, properties and durability” published by Woodhed Publishing, Elsevier, 2014, page 311-327 2. Rakesh Kumar, Sanjay Kumar, T.C.Alex, S. Srikanth & S.P.Mehrotra, Process Innovations using Mechanical Activation of Minerals and Wastes, Experimental and theoretical studies in modern mechanochemistry, Eds Francesco Delogu and Gabriele Mulas, 1 ISBN-10: 8178954540, ISBN-13: 978-8178954547, Transworld Research Network, Trivandrum 3. Sanjay Kumar, R. Kumar, A.Bandopadhyay, T. C. Alex and S. P. Mehrotra, Effect of mechanically activated fly ash on the properties of Geopolymer cement, Geopolymer Green Chemistry and Sustainable Development Solutions, Ed. J. Davidovits, Geopolymer Institute, Saint Quentin, France, 2005. Paper Published in Journals 1. Sylvain Tome, Christelle N Bewa, Achile Nana, Juvenal G Deutou Nemaleu, Marie A Etoh, Hervé K Tchakouté, Sanjay Kumar, Jacques Etame, Structural and Physico-mechanical Investigations of Mine Tailing-Calcined Kaolinite Based Phosphate Geopolymer Binder, Published online on 06.05.2021, Silicon, 2021, Springer 2. R.B Meshram, Sanjay Kumar, Comparative life cycle assessment (LCA) of geopolymer cement manufacturing with Portland cement in Indian context, Published online on 30.04.2021, International Journal of Environmental Science and Technology, 2021, Springer 3. Sylvain Tome, Achile Nana, Cyriaque Rodrigue Kaze, Jean Noel Yankwa Djobo, Thamer Alomayri, Elie Kamseu, Marie-Anne Etoh, Jacques Etame, Sanjay Kumar, Resistance of Alkali-Activated Blended Volcanic Ash-MSWI-FA Mortar in Sulphuric Acid and Artificial Seawater, Published online on 18.03.2021, Silicon, 2021, pp 1-8, Springer 4. Abhisek Mohapatra, Prasanta Bose, Sagar S Pandit, Sanjay Kumar, TC Alex, Bulk Utilization of Red Mud in Geopolymer Based Products, Advances in Sciences and Engineering, Vol 12, Issue 2, pp 86-91 5. Tome, Sylvain and Etoh, Marie-Annie and Etame, Jacques and Kumar, Sanjay, Improved Reactivity of Volcanic Ash using Municipal Solid Incinerator Fly Ash for Alkali-Activated Cement Synthesis. Waste and Biomass Valorization, Vol 11, pp. 3035-3044. 2020, Springer 6. S. Chakladar, S. Chakrabarty, A. Mohanty, T. C. Alex, Sanjay Kumar, Quality improvement of heat altered coals: A preliminary feasibility study, Environmental Technology & Innovation, Vol 18, May 2020, 100764. 7. S. K. Nath, Sanjay Kumar, Role of particle fineness on engineering properties and microstructure of fly ash derived geopolymer, Construction and Building Materials 233 (2020) 117294, 8. Rachit Ghost, S.K.Gupta, A.Kumar, Sanjay Kumar, Durability and Mechanical Behavior of Fly Ash-GGBFS Geopolymer Concrete Utilizing Bottom Ash as Fine Aggregate, Transaction of Indian Ceramic Society, 2019, Vol 1, 24-33 9. Sylvain Tome, Marie-Annie Etoh, Jacques Etame, Sanjay Kumar, Improved Reactivity of Volcanic Ash using Municipal Solid Incinerator Fly Ash for Alkali-Activated Cement Synthesis, Waste & Biomass Valorization, 2019, 1-10 10. S. K. Nath, Sanjay Kumar, Role of alkali concentration on reaction kinetics of fly ash geopolymerization, Journal of Non-Crystalline Solids, 2019, Vol 505, 241-51 11. Gábor Mucsi, Roland Szabó, Ádám Rácz, Ferenc Kristály, Sanjay Kumar, Combined utilization of red mud and mechanically activated fly ash in geopolymers, The Mining-Geology-Petroleum Engineering Bulletin, 2019, Vol 34, Issue 44, 27-36 12. S. K. Nath, Sanjay Kumar, Reaction kinetics of fly ash geopolymerization: Role of particle size controlled by using ball mill, Advanced Powder Technology, 2019, Vol 30, Issue 5, 1079-1088 13. Rakesh Kumar, Sanjay Kumar, T.C. Alex, Rashmi Singla, Mapping of calorimetric response for the geopolymerisation of mechanically activated fly ash, Journal of Thermal Analysis and Calorimetry, May 2019, Volume 136, Issue 3, 1117–1133 14. S. K. Nath, Sanjay Kumar, Influence of granulated silico manganese slag on compressive strength and microstructure of ambient cured alkali activated fly ash binder, Waste & Biomass Valorization, 2018, Vol 10, issue 7, 2045–2055 15. Rashmi Singla, T. C. Alex, Sanjay Kumar, Reactivity Alteration of Granulated Blast Furnace Slag by Mechanical Activation for High Volume Usage in Portland Slag Cement, Waste & Biomass Valorization, 2019, 1-11 16. Sylvain Tome, Marie-Annie Etoh, Jacques Etame, Sanjay Kumar, Characterization and Leachability Behaviour of Geopolymer Cement Synthesised from Municipal Solid Waste Incinerator Fly Ash and Volcanic Ash Blends, Recycling, 2018, Vol 3, Issue 4, 50 17. Sujeet Kumar, JNY Djobo, Anil Kumar, Sanjay Kumar, Size fractionation of brown fly ash: utilization of grey fraction as a pozzolanic material in blended cement, European Journal of Environmental & Civil Engineering, 2018, 1-16, 18. Rachit Ghosh, S Palit Sagar, Anil Kumar, Sunil Kumar Gupta, Sanjay Kumar, Estimation of geopolymer concrete strength from ultrasonic pulse velocity (UPV) using high power pulser, Journal of Building Engineering, 2018, Vol 16, 39-44 19. S. K. Nath, Sanjay Kumar, Reaction kinetics, microstructure and strength behavior of alkali activated silico manganese slag- fly ash blends, Construction and Building Materials, 2017, 147, 371-79, 20. S. K. Nath, S. Mukherjee, S. Maitra, Sanjay Kumar: Kinetics study of geopolymerization of fly ash using isothermal conduction calorimetry. Journal of Thermal Analysis and Calorimetry, 2017, Vol. 127, 1953-1961 21. S. K. Nath, Y. Rajshekar, T. C. Alex, T. Venugopalan, Sanjay Kumar, Evaluation of the suitability of alternative binder to replace OPC for iron ore slime briquetting, Transactions of Indian Institute of Metals, October 2017, Volume 70, Issue 8, page 2165–2174 22. Sanjay Kumar, G. Mucsi, F. Kristaly, P. Pekker, Mechanical activation of fly ash and its influence on micro and nano structural behaviour of resulting geopolymers, Advanced Powder Technology, 2017, 28, 805-13 23. Jean Noel Yankwa Djobo, Antoine Elimbi, Herve Kouamo Tchakoute, Sanjay Kumar, Volcanic ash based geopolymer cement/ concrete: The current state of art and perspectives, Environment Science & Pollution Research, 2017 Feb; 24(5), page 4433-4446. 24. Y. Rajshekar, T. C. Alex, D.P. Sahoo, T. Venugopalan, Sanjay Kumar, Iron Ore Slime as an Alternate Coolant in Steelmaking: Performance Evaluation at Commercial Scale, Journal of Cleaner Production, 2016, 139, 886-893 25. Mary B Ogundiran, Sanjay Kumar, Synthesis of fly ash-calcined clay geopolymers: reactivity, mechanical strength, structural and micro-structural characteristics, Construction and Building Materials, 2016, 125, 450-457 26. S. K. Nath, Sanjay Kumar, Evaluation of the suitability of ground granulated silico-manganese slag in Portland slag cement, Construction and Building Materials, 2016, 125, 127-134 27. Sujeet Kumar, Jean Noël Yankwa Djobo, Anil Kumar, Sanjay Kumar, Geopolymerization behaviour of fine iron-rich fraction of brown fly ash, Journal of Building Engineering, 2016, 8, 172–178 28. Jean Noel Yankwa Djobo, Antoine Elimbi, Herve Kouamo Tchakoute, Sanjay Kumar, Mechanical properties and durability of volcanic ash based geopolymer mortars, Construction and Building Materials, 2016, 124, 606-614 29. Jean Noel Yankwa Djobo, Antoine Elimbi, Herve Kouamo Tchakoute, Sanjay Kumar, Reactivity of volcanic ash in alkaline medium, microstructural and strength characterstics of resulting geopolymers under different synthesis condition, Journal of Material Science, 2016, 51(20), DI! 10.1007/s10853-016-0257-1 30. Jean Noel Yankwa Djobo, Antoine Elimbi, Herve Kouamo Tchakoute, Sanjay Kumar, Mechanical activation of volcanic ash for geopolymer synthesis: effect on reaction kinetics, gel characteristics, physical and mechanical properties, RSC Advances, 2016, 6, 39106-39117 31. S. K. Nath, S. Mukherjee, S. Maitra, Sanjay Kumar, Microstructural and morphological evolution of fly ash based geopolymers, Construction and Building Materials, 2016, 111(3), 758-765 32. Gabor Mucsi, Sanjay Kumar, et al. Control of geopolymer properties by grinding of land filled fly ash, International Journal of Mineral Processing, 2015, 143, 50-58 33. M. B. Ogundiran, Sanjay Kumar, Synthesis and characterization of geopolymer from Nigerian Clay, Applied Clay Science, 2015,108, 173-81 34. Sanjay Kumar, F. Kristaly, G. Mucsi, Geopolymerisation behaviour of size fractioned fly ash, Advanced Powder Technology, 2015, 26, 24-30 35. S. K. Nath, S. Mukherjee, S. Maitra, Sanjay Kumar, Ambient and Elevated Temperature Geopolymerization Behaviour of Class F Fly Ash, Trans. Ind. Ceram. Soc., 2014, vol. 73, no. 2, pp. 126-132 36. Arvind Pathak, Sanjay Kumar, Vinay Kumar Jha, Development of Building Material from Geopolymerization of Construction and Demolition Waste (CDW), Trans. Ind. Ceram. Soc., 2014, vol. 73, no. 2, pp. 133-137 37. D. K. Sinha, A. Kumar, Sanjay Kumar, Development of Geopolymer Concrete from Fly Ash and Bottom Ash Mixture, Trans. Ind. Ceram. Soc., 2014, vol. 73, no. 2, pp. 143-148 38. D. K. Sinha, A. Kumar, Sanjay Kumar, Reduction of pollution by using Fly ash, bottom ash and granulated blast furnace slag in geopolymer building materials, Scholars Journal of Engineering and Technology (SJET) 2013; 1(3):177-182 39. G. Mucsi, Z. Molnar, and Sanjay Kumar, Geopolymerisation of Mechanically Activated Lignite and Brown Coal Fly Ash. Acta Physica Polonica A, 126 , 2014, 994-998 40. Sanjay Kumar, R Kumar, Cement for low carbon economy, Special issue on Future cements, The Indian Concrete Journal July 2014, 29-36 41. S. K. Nath, Sanjay Kumar, Rakesh Kumar, Effect of mechanical activation on cordierite synthesis through solid-state sintering method, Bull. Mater. Sci., Vol. 37, No. 6, October 2014, pp. 1221–1226 42. R. Ghosh, A. Kumar, Sanjay Kumar, Flyash geopolymer Concrete as Future Concrete, International Journal of Advanced Scientific and Technical Research, 2013, Volume 1(3), 177-182 43. A. M. Kalinkin, Sanjay Kumar, B. I. Gurevich, E. V. Kalinkina, V. V. Tyukavkina, Synthesis of geopolymer materials based on slags of nonferrous metallurgy with the use of mechano-activation, Glass Physics and Chemistry, 40(1), 2014 pp. 26-30. 44. A. M. Kalinkin, T. C. Alex, S. K. Nath, B. I. Gurevich, E. V. Kalinkina, V. V. Tyukavkina, Sanjay Kumar , Geopolymers based on mechanically activated non-ferrous slag, Chemistry for sustainable development, 2013, 647-655. 45. Sanjay Kumar, P. García-Triñanes, Amândio Teixeira-Pinto, M. Bao, Development of alkali activated cement from mechanically activated silico-manganese (SiMn) slag, Cement & Concrete Composites 40 (2013) 7–13 46. T.C. Alex , A.M. Kalinkin, S.K. Nath, B.I. Gurevich, E.V. Kalinkina, V.V. Tyukavkina, Sanjay Kumar, Utilization of zinc slag through geopolymerization: Influence of milling atmosphere, International Journal of Mineral Processing 123 (2013) 102–107 47. S. K. Nath, Sanjay Kumar, Influence of iron making slags on strength and microstructure of fly ash geopolymer, Construction and Building Materials 38 (2013) 924–930 48. Anuj Kumar, Sanjay Kumar, Development of paving blocks from synergistic use of red mud and fly ash using geopolymerization, Construction and Building Materials 38 (2013) 865–871 49. Sanjay Kumar, D. P. Sahoo, S. K. Nath, T. C. Alex, Rakesh Kumar, From grey waste to green geopolymer, Science & Culture, 78, 11-12, (2012), 511-16 50. A. M. Kalinkin, Sanjay Kumar, B. I. Gurevich, T. C. Alex, E. V. Kalinkina, V. V. Tyukavkina, V. T. Kalinnikov, R. Kumar, 2012. Geopolymerization behavior of Cu–Ni slag mechanically activated in air and in CO2 atmosphere. Int. J. Miner. Process. 112–113, 101–106. 51. Sanjay Kumar, R. Kumar, Mechanical activation of fly ash: Effect on reaction, structure and properties of resulting geopolymer, Ceramics International 37 (2011) 533–541 52. Sanjay Kumar, R. Kumar, and S. P. Mehrotra,, Influence of granulated blast furnace slag on the reaction, structure and properties of fly ash based geopolymer, J Mater Sci (2010) 45:607–615 53. Sanjay Kumar, R. Kumar, A Bandopadhyay, T C Alex, B Ravi Kumar, S K Das, S P Mehrotra, Mechanical activation of granulated blast furnace slag and its effect on the properties and structure of Portland slag cement, Cement, Concrete, Composites, (8),2008, 679-685. 54. R. Kumar, Sanjay Kumar and S. P. Mehrotra, Towards sustainable solutions for fly ash through mechanical activation, Res Conserv Recycl, Volume 52, Issue 2, December 2007, Pages 157-179. 55. Sanjay Kumar, R. Kumar, T. C. Alex, A. Bandopadhyay and S. P. Mehrotra,, Influence of reactivity of fly ash on geopolymerisation, Advances in Applied Ceramics, 106(3), 2007, 120-27. 56. A Bandopadhyay, Sanjay Kumar, R. Kumar and S. P. Mehrotra, Emerging areas of environment management in iron and steel sector, Towards a Cleaner and Greener Environment, SAIL special publication, 2006, 11-15. 57. Sanjay Kumar, R. Kumar and A. Bandopadhyay, Innovative methodologies for the utilisation of metallurgical and other wastes, Resource, Conservation & Recycling, 48, 2006, 301-314. 58. Sanjay Kumar, A. Bandopadhyay, T.C.Alex and R. Kumar, Effect of mechanical activation on the synthesis and hydraulic properties of calcium dialuminate, Cer. Intl., 32, 2006, 555-560. 59. Sanjay Kumar and R. Kumar, Mechanochemistry in Ceramic Research, Bulletin of Indian Institute of Ceramics, India, Vol.14, No.3, 2005, 5153. 60. R. Kumar, Sanjay Kumar, S. Badjena and S. P. Mehrotra, Hydration of mechanically activated slag, Met. Trans. B., Vol 36 B, Dec 2005, 873-883. 61. Sanjay Kumar and K. K. Singh, Effects of Fly Ash Additions on the Sintering and Physico-Mechanical Properties of Ceramic Tiles, Journal of Metals, Materials and Processes, 16, 2-3, 2004, 351-358. 62. Sanjay Kumar, S.K. Das, S. K. Das, P.K. Daspoddar, Synthesis of mullite aggregates from fly ash: effect on thermomechanical behaviour of low cement castables, Brit. Cer. Trans., 103, 2004, 176-180. 63. Sanjay Kumar, A. Bandopadhyay, V. Rajinikanth, T. C. Alex & Rakesh Kumar, Improved processing of blended slag cement through mechanical activation, J. Material Science, 39, 2004, 3449-3552. 64. Sanjay Kumar, S.K. Das, P.K. Daspoddar, Thermo-mechanical behaviour of low cement castables derived from mullite aggregates synthesized from beach sand sillimanite, Ceramics International 29, 2003, 139–144. 65. Sanjay Kumar, K.K.Singh & P.Ramachandra Rao, Effect of fly ash addition on the mechanical & other properties of porcelainised stoneware tiles, J. Material Science, 36, 2001, 5917-5922. 66. S.K.Das, Sanjay Kumar & P.Ramachandra Rao, Exploitation of iron ore tailing for the development of ceramic tiles, Waste Management,20(8), 2000,725-29. 67. Bandopadhyay, Sanjay Kumar, S.K.Das & K.K.Singh, In the pursuit of waste free metallurgy, NML Technical Journal, 41(4), 1999, 143-62. 68. Sanjay Kumar, K.K.Singh & P. Ramachandrarao, Synthesis of cordierite from fly ash & its refractory properties, Journal of Material Science Letters, 19(14), 2000, 1263-66. The micrograph of this paper has been printed on the cover page of the journal. 69. Sanjay Kumar, S. K. Das & P. K. Daspoddar, Microstructure of calcium aluminates and their mixes after 3 days of hydration, Transactions of Indian Ceramic Society, 58(5), 1999, 115-17. 70. Sanjay Kumar, S. K. Das, U. S. Das & P. K. Daspoddar, Effect of microstructure on the properties of synthetic aggregates, Transactions of Indian Ceramic Society, 58(4), 1999, 89-91. 71. Sanjay Kumar, K. K. Singh, U. S. Das & B. K. Mittra, Effect of high carbon ferro-chrome slag addition on the properties of ceramic tiles, Trans. Indian Ceramic Society, 58(5),1999, 107-9. 72. Sanjay Kumar, S. K. Das & P. K. Daspoddar, Effect of fly ash based refractory aggregates on the high temperature properties of calcium aluminates, IRMA Journal, XXXII(1), 1999, 6-11. 73. Sanjay Kumar & V. K. Verma, Relief studies on Pachmarhi, Ind. J. Geomorphology, 1(2), 1998, 247-55. 74. S. K. Das, Sanjay Kumar & P. K. Daspoddar, Effect of synthetic refractory aggregates on the hydraulic and other properties of commercial high alumina cement, Industrial Ceramics, 17(1), 1997, 17-22. 75. Sanjay Kumar, S. K. Das & P. K. Daspoddar, Crystal morphology of calcium aluminates hydrated for 14 days - J. Mater.Sci. lett., 16(9), 1997, 735-36. 76. Sanjay Kumar, S. K. Das, U. S. Das & P. K. Daspoddar, Effect of synthetic aggregates on the high temperature strength properties of mixed calcium aluminates, NML Tech.Journal, 37(4), 1995, 117-22. Papers Presented/ Published in Proceedings of International Conference 1. S K Nath, Sanjay Kumar, Use of silico-manganese slag, Proceedings Asia Steel 2018, Organised by Tata Steel, 5-9 Feb, 2018, Bhubaneswar, India 2. Rashmi Singla, T C Alex, Sanjay Kumar, Enhancing the potential of ground granulated blast furnace slag by mechanical activation, Proceedings Asia Steel 2018, Organised by Tata Steel, 5-9 Feb, 2018, Bhubaneswar, India 3. Sanjay Kumar, Inorganic-organic hybrid geopolymer: a new generation material for tailored properties, Proceedings International Conference on Advancements in Polymeric Materials, Organised by LARPM, CIPET, Bhubaneswar, 02-04 Feb 2018, Bhubaneswar, India 4. Sanjay Kumar, Geopolymer: Our journey from nano to plant scale, Proceeding 3rd ASIA Geopolymer Symposium AGS 2016, Organised by UniMAP, 05 Aug 2016, Ho Chi Minh City, Vietnam 5. Gábor Mucsi, Imre Gombkötő, Zoltán Molnár, Imola Osváth, Sanjay Kumar, Effect of mechanical activation of fly ash on geopolymer properties, IMPC 2016: XXVIII International Mineral Processing Congress Proceedings. Konferencia Helye, Ideje: Quebec, Kanada, 2016.09. 11-2016.09. 15 6. Sanjay Kumar, S.K.Das, Geopolymer research in India for sustainable green technology, Proceedings of International Conference on Chemistry for Sustainable Development, Organised by Covenant University, 29-30 June 2016, Ota, Nigeria 7. Sanjay Kumar, R. Kumar, Synergising red mud and grey ash for greener geopolymer, Proceeding of Bauxite Residie Valorisation and Best Practices Conference, Organised by KU Leuven, 05-07 October 2015, Leuven, Belgium 8. Gabor Mucsi, Roland Szabo, Adam Racz, Zoltan Molnar, Ferenc Kristaly, Sanjay Kumar, Influence of red mud on the properties of geopolymer derived from mechanically activated lignite fly ash, Proceeding of Bauxite Residie Valorisation and Best Practices Conference, Organised by KU Leuven, 05-07 October 2015, Leuven, Belgium 9. S. K. Nath, S. Mukherjee, S. Maitra, Sanjay Kumar, Reaction kinetics study of fly ash geopolymer, Proceedings Engineering Conference International on Geopolymers, 24-29 May 2015, Herrnstein, Austria 10. Y. Rajshekar, T. Venugopalan, Sanjay Kumar, R. Sharma, Mine waste utilization-a case study for the use of iron ore slime in BOF process, Proceeding Intl Conf Mineral Processing Technology, 12-14 Jan 2015, Andhra University, Vishakhapatnam, India 11. D.P.Sahoo, Sanjay Kumar, R. Kumar, Design Improvements and Process optimization during operation of pilot plant for producing of fly ash based Geopolymer paving blocks, Proceeding Intl Conf Mineral Processing Technology, 12-14 Jan 2015, Andhra University, Vishakhapatnam, India 12. S.K. Nath, Sanjay Kumar, Utilisation of fly ash and iron making slag into geopolymeric material, International conference on Processing of Lean Grade & Urban Ore, 20-23 Jan 2015, CSIR-NML, Jamshedpur, India 13. R Ghosh, A Kumar, S. K. Gupta, Sanjay Kumar, Effect of GGBFS blending with fly ash on workability and strength properties of geopolymer concrete cured at ambient temperature, International conference on Processing of Lean Grade & Urban Ore, 20-23 Jan 2015, CSIR-NML, Jamshedpur, India 14. Gábor Mucsi, Zoltán Molnár, Sanjay Kumar: Influence of state of activation on the geopolymerisation of fly ash In: 17th International conference on waste recycling Proceedings of XVII. Waste Recycling Conference. Konferencia helye, ideje: Kassa, Szlovákia, 2013.11.21-2013.11.22. Kassa: Slovak Academy of Sciences, 2013. pp. 33-36. (ISBN:978-80-970034-6-3) 15. Gábor Mucsi, Zoltán Molnár, Ádám Rácz, József Faitli, Imre Gombkötő, Balázs Ráczkevi, Sanjay Kumar: High energy density milling as a tool for improving the properties of fly ash based geopolymer. International Mineral Processing Congress 2014 20-24. October 2014. Chile 16. Gábor Mucsi, Zoltán Molnár, Sanjay Kumar, Mechanical activation of C and F class fly ash in order to tailor geopolymer characteristic, Proc. International Conference on Mechanochemistry and Mechanical Alloying, June 22-26, 2014 Krakow, Poland 17. P. Garcia-Triñanes, Sanjay Kumar, M. Morgeneyer, Mechanical activation of SiMn slags, 13th European Symposium on Communition and Classification, September 9-12, 2013, Braunschweig, Germany 18. T.C. Alex , A.M. Kalinkin, S.K. Nath, B.I. Gurevich, E.V. Kalinkina, V.V. Tyukavkina, Sanjay Kumar, Geopolymers based on Zn slag mechanically activated in air and CO2 atmosphere, Proceedings of 4th International Conference on Fundamental Bases of Mechanochemical treatment FBMT 2013, June 25-28, 2013, Novosobirsk, Russia 19. Zoltan Molnar, Gabor Mucsi, Janos Lakatos, Sanjay Kumar, Investigation on fly ash based geopolymer by means of FTIR spectroscopy, Proceedings of Karpet-Medencei Kornyezettudomanyi Conference, June 13-15, 2013, Miskolc, Hungary 20. S.K.Nath, T. C. Alex, R. Kumar and Sanjay Kumar, Fly ash: looking beyond conventional use, Proceedings of International Conference on Utilization of fly ash – exploring new frontiers, Jan 10-11, 2013, Kolkata, India 21. Kalinkin A.M., Sanjay Kumar, Gurevich B.I., Alex T.C., Kalinkina E.V., Tyukavkina V.V., Kalinnikov V.T., Kumar R. Geopolymer material based on copper-nickel slag mechanically activated in air and in CO2, Proceedings of XIX Mendeleev Congress on General and Applied Chemistry, Volgograd, Russia 25 - 30 September, 2011 V.3, P.80, 22. Kalinkin A.M., Sanjay Kumar, Gurevich B.I., Kalinkina E.V., Tyukavkina V.V., Kalinnikov V.T, Synthesis of geopolymer material using mechanically activated magnesia ferriferous slag,., was presented at VIII All Russian Fersman Scientific Session, Apatity, Russia, 18-19 April, 2011, Published in the Scientific Session Proceedings, P. 250-254. (in Russian) 23. Sanjay Kumar, Rakesh Kumar, Tailoring geopolymer properties through mechanical activation of fly ash, 2nd International Conference on Sustainable Construction Materials and Technology, June 28-30, 2010, Ancona, Italy 24. Sanjay Kumar, Rakesh Kumar, Fly Ash Based Geopolymers: A Greener Building Material. Proceedings Sino-Indian Initiative on the Sustainable Management of Coal Ash, Kolkata, January 27-29, 2010. 25. Sanjay Kumar, Rakesh Kumar, S.P. Mehrotra, Geopolymers, fly ash reactivity and mechanical activation, 6th International Conference on Mechanochemistry and Mechanical Alloying, INCOME 2008, 1-4 Dec, 2008, Jamshedpur, India 26. R. Kumar, Sanjay Kumar, , S.P. Mehrotra, Mechanical activation in blended cement processing, 6th International Conference on Mechanochemistry and Mechanical Alloying, INCOME 2008, 1-4 Dec, 2008, Jamshedpur, India 27. Sanjay Kumar, Rakesh Kumar, A. Bandopadhyay, S.P. Mehrotra, Novel geopolymeric material through synergistic utilisation of industrial wastes: in Proc. Int. Conf. Alkali Activated Materials – Research, Production and Utilization, Prague, Czech Republic, June 21-22, 2007, 429-446. 28. Sanjay Kumar, R. Kumar, A. Bandopadhyay and S. P. Mehrotra, Mechanically induced reactivity of blast furnace slag and fly ash – Implications in building construction materials, 5th International Conference on Mechanochemistry and Mechanical Alloying, INCOME 2006, 3-6 July, 2006, Novosibirsk, Russia 29. S.P. Mehrotra, R. Kumar, Sanjay Kumar, Mechanical activation of solids in processing of minerals and wastes, Proc. International Mineral Processing Congress(IMPC), Instambul, Turkey, 2006, 2188-2193 . 30. Sanjay Kumar, R. Kumar, A. Bandopadhyay and S. P. Mehrotra, Geopolymer Mediated Solutions for the Management of Solid Industrial Wastes, International Conference on Mineral Processing Technology, Chennei, India, 2006. 31. A Bandopadhyay, M. C. Goswami and Sanjay Kumar, Improvement of environmental performance of integrated steel sector through process integration and optimisation measures, and innovative waste management practices, Proc. Intl. Symp. on Environmental Management of Mining and Metallurgical Industries (EMOMAMI – 2005), 11-14 Dec, 2005, Bhubaneswar, India. 32. R. Kumar, Sanjay Kumar, S. P. Mehrotra, Fly ash: towards sustainable solutions, Proc. International conference on Fly Ash Utilization, 4-7 Dec, 2005, New Delhi, India. 33. Sanjay Kumar, R. Kumar, A. Bandopadhyay, T.C. Alex, S. P. Mehrotra, High Strength Geopolymeric Materials through Mechanical Activation of Fly ash , Proc. International conference on Fly Ash Utilization, 4-7 Dec, 2005, New Delhi, India. 34. Sanjay Kumar, V. Rajinikanth, T.C.Alex, B.K.Mittra,, Z.H.Khan, I.B.Mishra, A.Bandopadhyay, Rakesh Kumar, Utilization of High Volume of Blast Furnace Slag and Fly Ash in Blended Cements through High Energy Milling, Proc. Conf. on Advance Concrete Structure, Chennai, Jan 2005. 35. Sanjay Kumar, A. Bandopadhyay, , V. .Rajinikant, T. C. Alex, I. B. Mishra, K.K.Singh,, Rakesh Kumar, Attrition milling for improved processing of blended cement, Proc. 8th NCB International Seminar on Cement & Building Materials, NCCBM, New Delhi, Nov.2003. 36. Sanjay Kumar, S. K. Malavia & K. K. Singh, Effect of Fe2O3 on the High Temperature Properties of Mullite, Proc. 4rd India Intl. Seminar on Refractories (IREFCON 2000), RDCIS, Ranchi, Feb’ 2000. 37. Sanjay Kumar, K.K.Singh, C.R.Mishra & M.M.Seth, Development of wear resistant ceramic products using NALCO's fly ash, Proc. International Seminar on Non-Ferrous Metals & Materials in 21st Century, NML, Jamshedpur, Feb'9-11, 2000 38. Sanjay Kumar, K.K.Singh & P.Ramachandrarao, Development of porcelainised tiles from fly ash, Proc.2nd International Conference on Fly Ash Disposal and Utilisation, New Delhi, Feb'2-4, 2000. 39. Sanjay Kumar & K. K. Singh, Fly ash based high strength ceramic tiles as building materials, Proc. 6th NCB International Seminar on Cement & Building Materials, 4, 1998, XIII 161-68. 40. Sanjay Kumar & K. K. Singh, Use of fly ash for hard ceramic liners, Proc. International Conference on Fly ash Disposal & Utilisation, 1998, 10, 23-29 41. S. K. Das, Sanjay Kumar & P. K. Daspoddar, Hydraulic & high temperature strength behaviour of high alumina cement in relation to synthetically prepared refractory aggregates, Proc. 2nd India International Refractory Congress, New Delhi, India, Feb'1996 , 40-48.
• National :   1. R Ghosh, A Kumar, S. K. Gupta, Sanjay Kumar, Study of thermal behaviour of fly ash based geopolymer concrete, National Conference on Environmental Issues, Challanges and Solutions, Organised by NIFFT, Ranchi, 23-24 Feb 2017, Ranchi 2. T.C. Alex, Sanjay Kumar, R. Kumar, Enhancing the reactivity of fly ash through pre-processing, National seminar on Management of Wastes of Metallurgical, Power and other industries, Feb 13-14, 2015, CGCRI, Kolkata 3. S.K.Nath, S. Mukherjee, S. Maitra, Sanjay Kumar, Microstructural evolution in fly ash geopolymer, 78 Annual Session of Indian Ceramic Society, Feb 2-3, 2015, Jamshedpur 4. S. K. Nath, T. C. Alex, D. Sinha, A. M. Kalinkin, Sanjay Kumar, Utilization of slag from metallurgical industries in geopolymer, 66 ATM of Indian Institute of Metals, November 16-19, 2012, Jamshedpur 5. S. K. Nath and Sanjay Kumar, Wear Resistant Ceramics from Fly Ash, Proceedings of Refractories & Furnaces for Energy Efficient & Environment Friendly Steel & Metal Processing, Sept 9-10, 2011, Kolkata, India 6. Sanjay Kumar and Rakesh Kumar, Processing and beneficiation of fly ash, Proceedings National Conference on Fly ash utilization, Dec 5-7, 2011, Hyderabad, India 7. S. Chatterjee, A. Bandopadhyay, A. K. Dutta, Sanjay Kumar, B. Sengupta, Technologies for mitigation of arsenic from groundwater, Proccedings of TIPOT Training cum Awareness Programme, 15-19 Jan, India, 72-94. 8. Sanjay Kumar, Rakesh Kumar and A. Bandopadhyay, Utilization of Industrial Wastes for Sustainable Development, , Paper presented in National seminar on ‘Harnessing Natural Resources of Orissa; 17-18 Feb, 2006, Bhubaneswar, India. 9. Sanjay Kumar, Rakesh Kumar, A. Badopadhyay, B. K. Mittra, S. P. Mehrotra,, Mechanochemistry in Cement research: Potential for high volume utilization of industrial waste, Presented in 69th Annual Session of Indian Ceramic Society, 28-29 Dec, 2005, Jamshedpur, India. Published in preprint. 10. Sanjay Kumar, K. K. Singh, S. K. Das & P. Ramachandrarao, Waste Utilisation: Towards Cleaner Environment, Proceedings of EWM 2002, Clean Technologies for Metallurgical industries, Edited by A.Bandopadhyay, Rakesh Kumar, and P. Ramachnadra Rao, Allied publishers, pp 41-47. 11. Sanjay Kumar, K. K. Singh & P. Ramachandrarao, Potential of fly ash for novel value added ceramic products -, In Proceedings of National Seminar on Utilisation of Fly Ash in Agriculture and for Value added Products. Organised by Central Fuel Research Institute, Dhanbad, Nov‘ 2000. 12. Sanjay Kumar, U.S. Das & K.K.Singh, Characterisation and evaluation of Chromite ore tailings for the development of ceramic tiles, Pre-prints of 64th Annual Session of Indian Ceramic Society, New Delhi, Jan'15-16, 2000. 13. Sanjay Kumar, K. K. Singh, U. S. Das & B. K. Mittra, Effect of high carbon ferro-chrome slag addition on the properties of ceramic tiles, Pre-prints 62nd Annual Session of Indian Ceramic Society, Jamshedpur, India, Dec'5-6, 1998. 14. Sanjay Kumar, U. S. Das & K. K. Singh, Sintering studies on fly ash and clay mixes, Proc. Fly ash utilisation for value added products, NML Pub., 1999, 99-105. 15. Sanjay Kumar & K.K. Singh, Development of corundum/mullite composites from fly ash and alumina mix by reaction sintering, Proc. Composite Materials, NML Pub., 1998, 198-205. 16. Sanjay Kumar, U. S. Das & K. K. Singh, Development of ceramic floor & wall tiles from fly ash , Proc. Environment & Waste Management, NML Pub, 2,1998, 149-54. 17. Sanjay Kumar, S. K. Das, U. S. Das & P. K. Daspoddar, Effect of microstructure on the properties of synthetic aggregates, Pre-prints 61st Annual Session of Indian Ceramic Society, Ahmedabad , India, Dec'1997. 18. S. K. Das, Sanjay Kumar & R. G. Shah, Some studies on olivine fines and clay mixtures - , Proc. Processing of Fines , NML Pub, 1997. 19. Sanjay Kumar, S. K. Das & P. K. Daspoddar, Development of new synthetic aggregates for castables - , Pre-prints 60th Annual Session of Indian Ceramic Society ,Ranchi ,India ,December'1996 , 1-4. 20. S. K. Das, Sanjay Kumar, K. K. Singh & P. Ramachandra Rao , Utilisation of Fly ash in making ceramic floor & wall tiles, Pre-prints National seminar on 'Recovery of Valuable By-products from Immediate Secondaries in Non-ferrous industries' held at HCL, Ghatsila ,India ,July'1996 , 7-10. 21. S. K. Das, Sanjay Kumar & P. Ramachandra Rao, Non-Conventional utilisation of Fly Ash : The Global Scenario, Pre-prints National Seminar on Fly Ash Utilisation ,New Delhi ,India, March'1996 , I-7-11. 22. S. K. Das, Sanjay Kumar & P. Ramachandra Rao, An innovative approach towards the utilisation of wastes generated from iron & steel industries, Proc. Environment & Waste Management in Metallurgical Industries, NML Pub.1996 , 86-93. 23. S. K. Das , Sanjay Kumar, K. C. Roy, B. K. Mittra, U. S. Das & K. N. Gupta, Role of different kinds of synthetic aggregate on the high temperature strength retaining capacities of mixed calcium aluminates, Pre-prints 59th Annual Session of Indian Ceramic Society, Madras ,India , Jan'1996, 334-346. 24. S. K. Das , Sanjay Kumar, K. C. Roy, B. K. Mittra, U. S. Das & K. N. Gupta , High value added ceramic products from fly ash - Developmental activities at the National Metallurgical Lab, Proc. National Workshop on Fly ash Utilisation , RRL Bhopal ,India, Jan'1995 ,65-82.

No.of.Patents :   1. Pratima Meshram, Abhilash, Sanjay Kumar, Vikash Bharti, A closed loop process for separation and recovery of Li, Ni, Co, Mn and graphite from spent/ waste/ scrap lithium based batteries of mixed chemistry, NML/PAT 0607/2021/IN 2. Abhilash, Pratima Meshram, Sanjay Kumar, A new process for selective extraction-separation-recovery of lithium from spent lithium based batteries of any or mixed chemistey, NML/PAT 0608/2021/IN 3. S K Nath, Sanjay Kumar, T C Alex, D P Sahoo, An improved process to produce ceramic tiles using overburden as raw material, Filed in Aug 2020 4. S. K. Nath, Sanjay Kumar, A process for preparation of blended cement using overburden shale as pozzolanic material, Filed in July 2019 5. N. S. Randhawa, S. K. Nath, Sanjay Kumar, A process for hot stage modification of copper smelter slag for recovery of iron and subsequent use of slag in cement, Filed in Sept 2019 6. Sanjay Kumar, T.C.Alex, S.Nath, D.P.Sahoo, An improved method to produce cold bonded briquettes from iron ore, 0450/2014 IN , India 7. S.K.Nath, Sanjay Kumar, An improved process to produce refractory bricks from ferrochrome slag, India 8. S K Nath, Sanjay Kumar, T C Alex, D P Sahoo, An Improved method to produce paving blocks from AOD slag using geopolymerization, 0114NF2014, India 9. Sanjay Kumar, S K Nath, T. C. Alex, M.K. Jha, An improved process to produce paving blocks from steel slag using Geopolymerisation, 1509/KOL/2011, India 10. R.Kumar, Sanjay Kumar, et al, An improved process for the preparation of Portland slag cement containing higher proportion of granulated blast furnace slag, US7,410,537, 2008 B2, USA, EP1889820 A1, 2006, Europe, 0804/DEL/2005, India, CA 2555498, 2011, Canada 11. R. Kumar, Sanjay Kumar, S. P. Mehrotra, A process for the production of reactive blast furnace slag, 0641/DEL/2006, India 12. R.Kumar, Sanjay Kumar, et al, An improved process for the production of blended cement containing higher proportion of fly ash using high energy milling, IN 254099, 2012, India 13. Sanjay Kumar, R. Kumar, et al, An improved process for the production of geopolymeric material from mechanically activated fly ash, IN251997, 2012, India 14. Sanjay Kumar, R.Kumar, et al, An improved process for the production of geopolymer cement from fly ash and granulated blast furnace slag, 728/DEL/2006, 2006, India 15. Sanjay Kumar, R. Kumar, et al, Process for the Production of Self-Glazed Geopolymer Tile from Fly Ash and BFSlag, 0780/DEL/2006, 2006, India 16. R. Kumar, Sanjay Kumar, et al, An improved process for the production of Portland pozzolona cement involving usage of raw and mechanically activated fly ash, 291/DEL/2008, 2008, India 17. S.K.Das, Sanjay Kumar, et al, Process for the production of ceramic tiles from industrial waste, US6743383, 2003, USA, 2,003,080,534, 2003, World Patent, AU 2002249548, 2002, Australia, 1800/DEL/96, 1996, India 18. Sanjay Kumar, S. K. Das, An improved process to produce synthetic refractory aggregates useful for refractory castable, 0084/DEL/97, 1997, India

• Awarded :   --
• Filed :   --

No.of.Technologies :   • Geopolymer Paving Blocks from Industrial Waste • Geopolymer Cement from Fly ash • Quick Road Repairing Material • Wear Resistant Ceramics from Fly Ash • High Volume Use of Fly Ash & GBFS in Cement using Mechanical Activation

• Developed :   --
• Transferred :   --

Equipment/Software Skills :   Highly skilled in handling ceramic processing devices, furnaces, mechanical activation devices Analytical skill for SEM, TEM, XRD, ICC, NMR, FTIR results of cementitious compounds

Awards and Recognitions :