Geopolymer Concrete with Recycled Concrete Aggregate
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Geopolymer concrete replaces cement based binder with a binder which contains no Portland cement. One type of geopolymer binder is that which contains fly-ash activated by an alkaline solution of sodium silicate and sodium hydroxide. Utilising recycled concrete waste from construction and demolition sites, that would otherwise be disposed of into landfill, as a source of aggregate offers a potential environmental and economic benefit. The term recycled concrete aggregate (RCA) is used to define aggregate produced from crushed demolition and construction waste. Research has been conducted into both recycled concrete aggregate (RCA) and geopolymer concrete; however there was limited published data on using RCA in geopolymer at the time of this research. This paper reports on the outcomes of the research into the mechanical properties of geopolymer concrete with recycled concrete aggregate as partial replacement of the natural coarse aggregate which indicate the potential of incorporating RCA in geopolymer concrete mixtures.
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Galvin, Benjamin; Lloyd, Natalie (2011)Concrete is one of the most consumed resources in the world. With an increased global focus on environmental concerns such as global warming, sustainable development and recycling; alternatives to conventional concrete ...
Utilising waste products from Kwinana industries to manufacture low specification geopolymer concreteSlabbert, Michael Charles (2008)One technology that makes concrete without cement and does not have the associated carbon footprint is geopolymer concrete. This technology utilizes waste fly ash from power stations and mixes it with activating chemicals ...
Mechanical properties of concrete containing recycled coarse aggregate at and after exposure to elevated temperaturesShaikh, Faiz (2018)© 2017 fib. International Federation for Structural Concrete This paper presents the effect of recycled coarse aggregate (RCA) of 50% and 100% by wt. on compressive strength and elastic modulus of concrete at elevated ...