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Co-fired fly ash, derived from the co-combustion of coal and biomass, is examined as a potential precursor for geopolymers. Compared to a coal fly ash, two co-fired fly ashes have a lower vitreous content and higher carbon content, primarily due to differing combustion processing variables. As a result, binders produced with these co-fired fly ashes have reduced reaction potential. Nevertheless, compressive...
Alkali-activated fly ash geopolymers are structural materials that can be used as a sustainable alternative to ordinary portland cement concrete in infrastructure applications. However, the widespread use of geopolymers by the construction industry has been limited in part by a lack of understanding about the fundamental reaction mechanisms that occur during their formation. Since microwave signals...
Productively reusing the waste residuals from energy production is an essential component in sustainable disposal and management of energy related waste. In the US, the world’s second largest producer of coal next to China, over 118 million tons of coal combustion by-products are produced each year; only 44% of which are productively reused. In recent decades, advances in lowering CO 2 , SO...
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