Stockpile of recycled aggregates: A carbon sink?
文献类型:期刊论文
作者 | Hou, Yunlu2,3,4; Mahieux, Pierre-Yves4; Turcry, Philippe4; Lux, Jerome4; Jourdain, Xavier1; Ait-Mokhtar, Abdelkarim4 |
刊名 | CONSTRUCTION AND BUILDING MATERIALS
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出版日期 | 2025-04-25 |
卷号 | 473页码:16 |
关键词 | Construction and demolition wastes Recycled aggregates Concrete Carbonation Carbon capture and utilization (CCU) |
ISSN号 | 0950-0618 |
DOI | 10.1016/j.conbuildmat.2025.140979 |
英文摘要 | Recycled aggregate (RA) are typically stored in large stockpiles for several months after crushing. This study investigates whether such stockpiles can act as carbon sinks through natural concrete carbonation. To evaluate this, the CO2 uptake of a stockpile from an existing plant was modelled by taking into account the main driving-forces of carbonation, i.e., diffusion, permeation due to wind and CO2 binding by RA. Input parameters were determined from samples collected after crushing using new experimental devices. A 4-month carbonation was simulated under optimal conditions, i.e., in the absence of water-saturation of the stockpile by rain. The effects of various parameters were discussed through numerical simulations and analysis of characteristic times. The results show that gas diffusion alone is insufficient for deep carbonation, with significant carbonation limited to the top few centimeters of the stockpile. Although wind-driven advection could enhance deeper carbonation, it would require highly favorable conditions, such as continuous high speed wind. Over 4 months, the CO2 uptake only represents less 1 % of the stockpile binding capacity, which does not compensate for the emissions from the machines used on the platform. The change in the pile surface area due to samplings also does not increase the CO2 uptake. We conclude that it would be conservative not to take into account the CO2 uptake that occurs during RA storage in life cycle assessments. |
资助项目 | Region Nouvelle Aquitaine |
WOS研究方向 | Construction & Building Technology ; Engineering ; Materials Science |
语种 | 英语 |
WOS记录号 | WOS:001457978100001 |
出版者 | ELSEVIER SCI LTD |
源URL | [http://119.78.100.198/handle/2S6PX9GI/36162] ![]() |
专题 | 中科院武汉岩土力学所 |
通讯作者 | Turcry, Philippe |
作者单位 | 1.La Rochelle Univ, IUT Genie Civil Construct Durable, La Rochelle, France 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn Safety, Wuhan 430071, Peoples R China 4.La Rochelle Univ, LaSIE, Lab Sci Ingn Environm, CNRS,UMR 7356, La Rochelle, France |
推荐引用方式 GB/T 7714 | Hou, Yunlu,Mahieux, Pierre-Yves,Turcry, Philippe,et al. Stockpile of recycled aggregates: A carbon sink?[J]. CONSTRUCTION AND BUILDING MATERIALS,2025,473:16. |
APA | Hou, Yunlu,Mahieux, Pierre-Yves,Turcry, Philippe,Lux, Jerome,Jourdain, Xavier,&Ait-Mokhtar, Abdelkarim.(2025).Stockpile of recycled aggregates: A carbon sink?.CONSTRUCTION AND BUILDING MATERIALS,473,16. |
MLA | Hou, Yunlu,et al."Stockpile of recycled aggregates: A carbon sink?".CONSTRUCTION AND BUILDING MATERIALS 473(2025):16. |
入库方式: OAI收割
来源:武汉岩土力学研究所
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