Evolution of microstructure and CO2 diffusion coefficient of compacted recycled aggregates during carbonation investigated by X-ray tomography
文献类型：期刊论文
| 作者 | Hou, Yunlu; Lux, Jerome; Mahieux, Pierre-Yves; Turcry, Philippe; Ait-Mokhtar, Abdelkarim |
| 刊名 | CONSTRUCTION AND BUILDING MATERIALS
 |
| 出版日期 | 2023-04-03 |
| 卷号 | 372 |
| 关键词 | Microstructure Carbonation Recycled aggregates CO2 diffusion coefficient X-ray tomography |
| ISSN号 | 0950-0618 |
| 英文摘要 | Recycled aggregates compacted in road layers are made of a majority of concrete aggregates which can mineralize atmospheric CO2. Previous studies showed that carbonation modifies the microstructure of recycled concrete aggregates, but little information is available in the case of compacted recycled aggregates. Further-more, carbonation kinetics depends on CO2 diffusion through the compacted material, which is linked its microstructure. This paper presents an investigation of the evolution of both microstructure and CO2 diffusion coefficient of compacted recycled aggregates during carbonation in two different environments by X-ray to-mography. Segmented 3D images were analyzed to fully extract resolved pore structures. In addition, the CO2 diffusion coefficient variations were investigated by calculating the macroscopic diffusivity tensor in the segmented 3D images. We show that the numerical results are very similar to previous experimental results from gas diffusion tests and that the diffusivity coefficients can be estimated by using only the larger pore network (pore size > 5.5 mu m). These findings suggest that nondestructive imaging approaches, such as micro-Computed Tomography (mu CT), are a relevant alternative to experimental characterization methods. |
| 学科主题 | Construction & Building Technology ; Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000947913700001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34953]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS; 2.Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS |
| 推荐引用方式 GB/T 7714 | Hou, Yunlu,Lux, Jerome,Mahieux, Pierre-Yves,et al. Evolution of microstructure and CO2 diffusion coefficient of compacted recycled aggregates during carbonation investigated by X-ray tomography[J]. CONSTRUCTION AND BUILDING MATERIALS,2023,372. |
| APA | Hou, Yunlu,Lux, Jerome,Mahieux, Pierre-Yves,Turcry, Philippe,&Ait-Mokhtar, Abdelkarim.(2023).Evolution of microstructure and CO2 diffusion coefficient of compacted recycled aggregates during carbonation investigated by X-ray tomography.CONSTRUCTION AND BUILDING MATERIALS,372. |
| MLA | Hou, Yunlu,et al."Evolution of microstructure and CO2 diffusion coefficient of compacted recycled aggregates during carbonation investigated by X-ray tomography".CONSTRUCTION AND BUILDING MATERIALS 372(2023). |
入库方式： OAI收割
来源：武汉岩土力学研究所
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