Improving mechanical characteristics of lightweight geopolymers through mechanical activation of fly ash
Authors
Ivanović, Tijana G.Komljenović, Miroslav M.
Džunuzović, Nataša M.
Nikolić, Violeta M.
Tanasijević, Gordana G.
Conference object (Published version)
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The present paper investigated the influence of mechanical activation of fly ash and various parameters, such as curing temperature and concentration of foaming agent (Al powder), on physical-mechanical characteristics of lightweight geopolymers. Prior to alkali activation, fly ash was mechanically activated in a high energy planetary ball mill. Lightweight geopolymers were obtained by mixing the mechanically activated fly ash with various amounts of Al powder and sodium silicate solution (SiO2/Na2O mass ratio of 1.5). Geopolymer paste samples were cured covered in plastic either at room temperature for 28 days or at elevated temperature (95 oC) for 4 hours. It was observed that the mechanical activation of fly ash resulted in a drastic increase of geopolymer compressive strength regardless of curing conditions, preserving the lightweight properties at the same time. The lightweight geopolymers based on mechanically activated fly ash might be used both in constructive and insulating ap...plications.
Keywords:
mechanical activation / lightweight geopolymers / compressive strength / aluminum powderSource:
International Conference on Sustainable Materials, Systems and Structures (SMSS 2019) New Generation of Construction Materials, 2019, 558-565Publisher:
- RILEM Publications S.A.R.L., Rovinj, Croatia
Funding / projects:
- Geopolymers - technology for converting the industrial waste into functional materials (RS-MESTD-Technological Development (TD or TR)-34026)
- NATO SPS programme 985402
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Institution/Community
Institut za multidisciplinarna istraživanjaTY - CONF AU - Ivanović, Tijana G. AU - Komljenović, Miroslav M. AU - Džunuzović, Nataša M. AU - Nikolić, Violeta M. AU - Tanasijević, Gordana G. PY - 2019 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/3108 AB - The present paper investigated the influence of mechanical activation of fly ash and various parameters, such as curing temperature and concentration of foaming agent (Al powder), on physical-mechanical characteristics of lightweight geopolymers. Prior to alkali activation, fly ash was mechanically activated in a high energy planetary ball mill. Lightweight geopolymers were obtained by mixing the mechanically activated fly ash with various amounts of Al powder and sodium silicate solution (SiO2/Na2O mass ratio of 1.5). Geopolymer paste samples were cured covered in plastic either at room temperature for 28 days or at elevated temperature (95 oC) for 4 hours. It was observed that the mechanical activation of fly ash resulted in a drastic increase of geopolymer compressive strength regardless of curing conditions, preserving the lightweight properties at the same time. The lightweight geopolymers based on mechanically activated fly ash might be used both in constructive and insulating applications. PB - RILEM Publications S.A.R.L., Rovinj, Croatia C3 - International Conference on Sustainable Materials, Systems and Structures (SMSS 2019) New Generation of Construction Materials T1 - Improving mechanical characteristics of lightweight geopolymers through mechanical activation of fly ash EP - 565 SP - 558 UR - https://hdl.handle.net/21.15107/rcub_rimsi_3108 ER -
@conference{ author = "Ivanović, Tijana G. and Komljenović, Miroslav M. and Džunuzović, Nataša M. and Nikolić, Violeta M. and Tanasijević, Gordana G.", year = "2019", abstract = "The present paper investigated the influence of mechanical activation of fly ash and various parameters, such as curing temperature and concentration of foaming agent (Al powder), on physical-mechanical characteristics of lightweight geopolymers. Prior to alkali activation, fly ash was mechanically activated in a high energy planetary ball mill. Lightweight geopolymers were obtained by mixing the mechanically activated fly ash with various amounts of Al powder and sodium silicate solution (SiO2/Na2O mass ratio of 1.5). Geopolymer paste samples were cured covered in plastic either at room temperature for 28 days or at elevated temperature (95 oC) for 4 hours. It was observed that the mechanical activation of fly ash resulted in a drastic increase of geopolymer compressive strength regardless of curing conditions, preserving the lightweight properties at the same time. The lightweight geopolymers based on mechanically activated fly ash might be used both in constructive and insulating applications.", publisher = "RILEM Publications S.A.R.L., Rovinj, Croatia", journal = "International Conference on Sustainable Materials, Systems and Structures (SMSS 2019) New Generation of Construction Materials", title = "Improving mechanical characteristics of lightweight geopolymers through mechanical activation of fly ash", pages = "565-558", url = "https://hdl.handle.net/21.15107/rcub_rimsi_3108" }
Ivanović, T. G., Komljenović, M. M., Džunuzović, N. M., Nikolić, V. M.,& Tanasijević, G. G.. (2019). Improving mechanical characteristics of lightweight geopolymers through mechanical activation of fly ash. in International Conference on Sustainable Materials, Systems and Structures (SMSS 2019) New Generation of Construction Materials RILEM Publications S.A.R.L., Rovinj, Croatia., 558-565. https://hdl.handle.net/21.15107/rcub_rimsi_3108
Ivanović TG, Komljenović MM, Džunuzović NM, Nikolić VM, Tanasijević GG. Improving mechanical characteristics of lightweight geopolymers through mechanical activation of fly ash. in International Conference on Sustainable Materials, Systems and Structures (SMSS 2019) New Generation of Construction Materials. 2019;:558-565. https://hdl.handle.net/21.15107/rcub_rimsi_3108 .
Ivanović, Tijana G., Komljenović, Miroslav M., Džunuzović, Nataša M., Nikolić, Violeta M., Tanasijević, Gordana G., "Improving mechanical characteristics of lightweight geopolymers through mechanical activation of fly ash" in International Conference on Sustainable Materials, Systems and Structures (SMSS 2019) New Generation of Construction Materials (2019):558-565, https://hdl.handle.net/21.15107/rcub_rimsi_3108 .