Thermal conductivity and pore structure analysis of alkali-activated foam cement with supercritical CO2 modified slag: Feasibility evaluation for geothermal applications
文献类型：期刊论文
| 作者 | Xue, Quan1,2; Zhang, Liwei1,2; Mei, Kaiyuan1,2; Li, Xiaochun1,2 ; Wang, Yan2; Cheng, Xiaowei3; Fu, Xiaojuan2
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| 刊名 | CONSTRUCTION AND BUILDING MATERIALS
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| 出版日期 | 2022-09-12 |
| 卷号 | 347期号:-页码:- |
| 关键词 | Alkali-activated cement Pore structure Supercritical CO2 Geothermal energy |
| ISSN号 | 0950-0618 |
| 英文摘要 | Geothermal energy is a clean and renewable energy that can be extracted by energy piles. Low density filling materials with relatively high thermal conductivity are ideal for energy pile construction, due to the low cost and high heat exchange efficiency of filling materials. In this study, three types of low density filling materials (Class G foam cement, alkali-activated foam cement, and supercritical CO2 (ScCO2) modified alkali-activated foam cement) were tested to evaluate their performances to serve as candidate filling materials for energy piles. The thermal conductivities of the three materials were measured and showed that the minimum thermal conductivity was 0.22 W.mK(-1) (foam cement without slag), and the maximum thermal conductivity was 0.32 W.mK(-1) (foam cement with 5 % CO2 modified slag). By analyzing the cement hydration products and distribution of pores, adding slag improved the hydration of cement, which caused a longer foaming time and increased the porosity of samples. ScCO2 modification of slag increased the porosity and the thermal conductivities of the samples. In summary, slag with ScCO2 modification can promote the thermal conductivity of foam cement, which is beneficial to the application of shallow energy piles. |
| 学科主题 | Construction & Building Technology ; Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000844057700002 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35087]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.University of Chinese Academy of Sciences, Beijing 100049, China 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China 3.School of New Energy and Materials, Southwest Petroleum University, Chengdu, Sichuan 610500, China |
| 推荐引用方式 GB/T 7714 | Xue, Quan,Zhang, Liwei,Mei, Kaiyuan,et al. Thermal conductivity and pore structure analysis of alkali-activated foam cement with supercritical CO2 modified slag: Feasibility evaluation for geothermal applications[J]. CONSTRUCTION AND BUILDING MATERIALS,2022,347(-):-. |
| APA | Xue, Quan.,Zhang, Liwei.,Mei, Kaiyuan.,Li, Xiaochun.,Wang, Yan.,...&Fu, Xiaojuan.(2022).Thermal conductivity and pore structure analysis of alkali-activated foam cement with supercritical CO2 modified slag: Feasibility evaluation for geothermal applications.CONSTRUCTION AND BUILDING MATERIALS,347(-),-. |
| MLA | Xue, Quan,et al."Thermal conductivity and pore structure analysis of alkali-activated foam cement with supercritical CO2 modified slag: Feasibility evaluation for geothermal applications".CONSTRUCTION AND BUILDING MATERIALS 347.-(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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