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An industrial demonstration study on CO(2) mineralization curing for concrete

A 10,000 ton-CO(2)/y mineralization curing (CMC) process was demonstrated in Jiaozuo city, China by retrofitting a traditional autoclaved curing plant. An industrial concrete formula with synergistic effects of aggregate gradation, early hydration, and alkali excitation was developed using local sol...

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Detalles Bibliográficos
Autores principales: Wang, Tao, Yi, Zhenwei, Song, Jiayi, Zhao, Chao, Guo, Ruonan, Gao, Xiang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9062350/
https://www.ncbi.nlm.nih.gov/pubmed/35521533
http://dx.doi.org/10.1016/j.isci.2022.104261
Descripción
Sumario:A 10,000 ton-CO(2)/y mineralization curing (CMC) process was demonstrated in Jiaozuo city, China by retrofitting a traditional autoclaved curing plant. An industrial concrete formula with synergistic effects of aggregate gradation, early hydration, and alkali excitation was developed using local solid wastes resources. Approximately 90% of the raw materials, including fly ash, furnace blaster slag, steel slag, and carbide slag, came from coal-based industries. An extraordinary phenomenon of high-temperature accumulation from room temperature to 140°C was first observed in an industrial scale because of the rapid and strong exothermic carbonation reaction. A step pressure-equalizing procedure was developed to achieve a rapid carbonation rate, a high CO(2) conversion ratio of >98%, and efficient carbonation exotherm recycling. The global warming potential life cycle analysis revealed that compared with autoclaved curing, CMC showed significantly decreased the emission of 182 kg CO(2)-Eq/m(3)-product, with direct CO(2) sequestration accounting for ∼65% of the reduction.