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Recycling of calcined carbonated cement pastes as cementitious materials: Proposed CCUS technology for calcium looping
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| Title: | Recycling of calcined carbonated cement pastes as cementitious materials: Proposed CCUS technology for calcium looping |
| Authors: | Kong, Y. K. Browse this author | | Ruan, S. Browse this author | | Kurumisawa, Kiyofumi Browse this author →KAKEN DB |
| Keywords: | Carbon capture, utilization, and storage | | Calcium looping | | Calcined carbonated cement paste | | Compressive strength | | Microstructural analysis | | Life cycle assessment |
| Issue Date: | Oct-2022 |
| Publisher: | Elsevier |
| Journal Title: | Journal of environmental chemical engineering |
| Volume: | 10 |
| Issue: | 5 |
| Start Page: | 108247 |
| Publisher DOI: | 10.1016/j.jece.2022.108247 |
| Abstract: | In this study, calcined carbonated hydrated cement pastes (HCPs) were used to partially replace ordinary Portland cement (OPC) as a cementitious material. Calcined carbonated HCP can be derived from carbonated HCP after the release of CO2 for the carbon capture, utilization, and storage (CCUS). Calcined carbonated HCP was produced by calcining carbonated HCP at 1000 degrees C, also used in calcium looping. The crystal phase compositions of the HCP, carbonated HCP, and calcined carbonated HCP were identified. Various hardening and microstructural tests on the composite cement paste mixtures blended with calcined carbonated HCP were performed. The initial results showed that the HCP could sequester CO2, forming various calcium carbonates. After carbonated HCP calcination, the main nanocrystalline phases of calcium silicate hydrate (C-S-H) and calcium carbonate decomposed, forming lime and wollastonite. The 28-day compressive strength of the calcined carbonated HCP-OPC mixtures increased with the replacement ratio up to 20%, owing to the filler effect of wollastonite. The microstructural analysis revealed that the portlandite, C-S-H, and monocarboaluminate phases were formed after hydration. Finally, by recycling demolition waste, this study proposed a technology roadmap for CCUS to achieve this goal, and a life cycle assessment was conducted to evaluate and compare the environmental impacts of producing 1 t of calcined carbonated HCP-OPC mixtures and plain OPC paste. |
| Rights: | © <2022>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/92727 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 胡桃澤 清文
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