Preparation and characterization of ultra-lightweight foamed geopolymer (UFG) based on fly ash-metakaolin blends

Davidovits, 1991, Geopolymers: inorganic polymeric new materials, J. Therm. Anal. Calorim., 37, 1633, 10.1007/BF01912193 Jaarsveld, 1997, The potential use of geopolymeric materials to immobilise toxic metals: Part I, Theory Appl. Miner Eng., 10, 659, 10.1016/S0892-6875(97)00046-0 Provis, 2009 Othuman, 2011, Elevated-temperature thermal properties of lightweight foamed concrete, Constr. Build. Mater., 25, 705, 10.1016/j.conbuildmat.2010.07.016 Akthar, 2010, High porosity (>90%) cementitious foams, Cem. Concr. Res., 40, 352, 10.1016/j.cemconres.2009.10.012 Amran, 2015, Properties and applications of foamed concrete; a review, Constr. Build. Mater., 101, 990, 10.1016/j.conbuildmat.2015.10.112 Rutkevičius, 2015, Sound absorption of porous cement composites: effects of the porosity and the pore size, J. Mater. Sci., 50, 3495, 10.1007/s10853-015-8912-5 Zhang, 2015, Mechanical, thermal insulation, thermal resistance and acoustic absorption properties of geopolymer foam concrete, Cem. Concr. Compos., 62, 97, 10.1016/j.cemconcomp.2015.03.013 Rui, 2016, Porous biomass fly ash-based geopolymers with tailored thermal conductivity, J. Clean. Prod., 119, 99, 10.1016/j.jclepro.2016.01.083 Richard, 2013, Experimental production of sustainable lightweight foamed concrete, J. Appl. Sci. Tech., 3, 994, 10.9734/BJAST/2013/4242 Duxson, 2007, The role of inorganic polymer technology in the development of ‘green concrete’, Cem. Concr. Res., 37, 1590, 10.1016/j.cemconres.2007.08.018 Provis, 2014, Geopolymers and other alkali activated materials: why, how, and what?, Mater. Struct., 47, 11, 10.1617/s11527-013-0211-5 Abdollahnejad, 2001, Development of foam one-part geopolymers with enhanced thermal insulation performance and low carbon dioxide emissions, Adv. Mater. Res., 2015, 96 Alvarezayuso, 2008, Environmental, physical and structural characterisation of geopolymer matrixes synthesised from coal (co-)combustion fly ashes, J. Hazard. Mater., 154, 175, 10.1016/j.jhazmat.2007.10.008 Cheng, 2003, Fire-resistant geopolymer produced by granulated blast furnace slag, Miner. Eng., 16, 205, 10.1016/S0892-6875(03)00008-6 Abdullah, 2012, Fly ash-based geopolymer lightweight concrete using foaming agent, Int. J. Mol. Sci., 13, 7186, 10.3390/ijms13067186 Hajimohammadi, 2017, Alkali activated slag foams: the effect of the alkali reaction on foam characteristics, J. Clean. Prod., 147, 330, 10.1016/j.jclepro.2017.01.134 Masi, 2014, A comparison between different foaming methods for the synthesis of light weight geopolymers, Ceram. Int., 40, 13891, 10.1016/j.ceramint.2014.05.108 Sanjayan, 2015, Physical and mechanical properties of lightweight aerated geopolymer, Constr. Build. Mater., 79, 236, 10.1016/j.conbuildmat.2015.01.043 Hajimohammadi, 2017, Regulating the chemical foaming reaction to control the porosity of geopolymer foams, Mater. Des., 120, 255, 10.1016/j.matdes.2017.02.026 Kuzielová, 2016, Effect of activated foaming agent on the foam concrete properties, Constr. Build. Mater., 125, 998, 10.1016/j.conbuildmat.2016.08.122 Zhang, 2010, Effects of fly ash source and curing procedure on strength development of geopolymers Ducman, 2016, Characterization of geopolymer fly-ash based foams obtained with the addition of Al powder or H2O2 as foaming agents, Mater. Charact., 113, 207, 10.1016/j.matchar.2016.01.019 Rickard, 2011, Assessing the suitability of three Australian fly ashes as an aluminosilicate source for geopolymers in high temperature applications, Mater. Sci. Eng., 528, 3390, 10.1016/j.msea.2011.01.005 Bonakdar, 2013, Physical and mechanical characterization of Fiber-Reinforced Aerated Concrete (FRAC), Cem. Concr. Compos., 38, 82, 10.1016/j.cemconcomp.2013.03.006 Nambiar, 2007, Air-void characterisation of foam concrete, Cem. Concr. Res., 37, 221, 10.1016/j.cemconres.2006.10.009 Zhang, 2014, Geopolymer foam concrete: an emerging material for sustainable construction, Constr. Build. Mater., 56, 113, 10.1016/j.conbuildmat.2014.01.081 M.H. Veazey, Artificially colored granules and method of producing same: US, Patent 2,215,600[P]. 1940-9-24. Ortega, 2003, Alternative gelling agents for the gelcasting of ceramic foams, J. Eur. Ceram. Soc., 23, 75, 10.1016/S0955-2219(02)00075-4 Pan, 2014, Preparation and characterization of super low density foamed concrete from Portland cement and admixtures, Constr. Build. Mater., 72, 256, 10.1016/j.conbuildmat.2014.08.078 Zhou, 2010, An environment-friendly thermal insulation material from cotton stalk fibers, Energy Build., 42, 1070, 10.1016/j.enbuild.2010.01.020 Feng, 2015, Development of porous fly ash-based geopolymer with low thermal conductivity, Mater. Des., 65, 529, 10.1016/j.matdes.2014.09.024 Khalil, 1994, Immobilization of intermediate-level wastes in geopolymers, J. Nucl. Mater., 211, 141, 10.1016/0022-3115(94)90364-6 Jaarsveld, 2002, The effect of composition and temperature on the properties of fly ash- and kaolinite-based geopolymers, J. Chem. Eng., 89, 63, 10.1016/S1385-8947(02)00025-6