Geopolymerization of Solid Waste:Technical and Commercial Progress
Geopolymers are novel engineering materials with the potential to play a highly significant role in the transformation of the construction materials and building products industry in the push towards sustainable development.These materials are formed by activation of industrial aluminosilicate waste materials such as coal ash or blast furnace slag with alkaline solutions.Some mineral waste can also be used,either as fillers or as reactive components.The use of waste-based geopolymers esults in significant (up to 90%) reduction in carbon dioxide emissions when used in cement replacement applications.In addition to the formation of conventional pre-cast products,these high performance mineral binders are ideally suited to use in the conversion or encapsulation of toxic waste,including radioactive waste,due to their chemical stability and resistance to acid attack.It is the aim of this paper to review recent developments on the science underpinning this green technology,and to discuss the technical and commercial drivers governing the large-scale adoption of the technology.Some of the recent fundamental breakthroughs in the study of geopolymer technology at the University of Melbourne will be presented.Despite the complexity of this reactive solid-gel system,progress has been made in the development of a thermochemical reaction kinetic model that has been validated using both calorimetric data and synchrotron kinetic data.Geopolymerization is potentially a disruptive technology,so that it is normal to expect strong resistance from established companies in the construction materials industry.It is increasingly necessary that waste generating industries such as mining collaborate with industries such as construction that could utilize this waste.The worlds first full scale geopolymer plant utilizing waste and recycled material has been commissioned recently in Melbourne,Australia,so progress on commercialization will also be presented.The authors frequently present keynote lectures on geopolymer science and technology at materials science,ceramics and construction materials conferences.However,this interdisciplinary technology that is still in its infancy,deserves more attention in the mineral processing and mining industry in view of its potential use in the mining industry,and also in view of the importance of mineral processing techniques in recent advances in geopolymers.
Recycling Waste Encapsulation Geopolymer
J.S.J.van Deventer P.Duxson J.L.Provis G.C.Lukey
Department of Chemical and Biomolecular Engineering,The University of Melbourne,Victoria,Australia
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
3592-3597
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）