Effects of ladle slag on Class F fly ash geopolymer: Reaction mechanism and high temperature behavior

نویسندگان

چکیده

Due to its low hydraulic reactivity, ladle slag is currently underutilized with nearly 80% of annual generation either landfilled or dumped. This work investigates the joint activation LS Class F fly ash, and impact on ash geopolymer focus activation, hydrates assemblage, conversion process, thermal behavior. Results reveal that unique reaction process in alkali system shows a positive influence geopolymers. Within an alkaline rich soluble Si, initially hydrated CAH phases transform into C-A-S-H, which not only hinders enhances mechanical strength but also retains geopolymerization. The hybrid exhibits superior performance pure geopolymers, especially under high temperature exposure. With increasing substitution, more stable crystalline are formed at temperatures. After 800 °C exposure, residual compressive 64.7 MPa achieved 25 wt% addition compared 55.2

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ژورنال

عنوان ژورنال: Cement & Concrete Composites

سال: 2022

ISSN: ['0958-9465', '1873-393X']

DOI: https://doi.org/10.1016/j.cemconcomp.2022.104468