Cold-sintered Carbonated Concrete Waste Fines: A Calcium Carbonate Concrete Block
Ippei Maruyama,
Ngoc Kien Bui,
Amr Meawad
et al.
Abstract:Cementitious materials generally have large carbon footprints because of the high CO 2 emitted during Portland cement production. This is because limestone is used as an essential CaO resource, and its decomposition by calcination emits CO 2 . From this perspective, the concrete in urban buildings can be considered an urban mine of CaO resources. In this study, we propose obtaining a solidified product by crushing all the waste concrete, carbonating it, pressurizing it with a calcium bicarbonate solution, and … Show more
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