Lanzhou University of Technology Institutional Repository (LUT_IR)
Effects of various inlet-gas mediums on apparent permeability of concrete under steady-state flow: Comparison between carbon-dioxide and oxygen | |
Qian, Rusheng1,2; Liu, Cheng1; Liu, Guojian3; Liu, Zhiyong1; Pang, Bo1; She, Wei1; Zhang, Yunsheng1,4 | |
2021-05 | |
发表期刊 | Cement and Concrete Composites |
ISSN | 0958-9465 |
卷号 | 119 |
摘要 | Apparent gas-permeability (ka) of concrete highly depends on pore-structure and medium. However, the effects of gas-medium on permeability have yet been investigated in depth. In this work, concrete with various water-to-cement ratios and fly-ash/slag dosages is prepared for ka testing. Various gas-mediums (CO2 and O2) are applied for analyzing their effects on the ka. Meanwhile, pore-structure characteristic, inner gas-pressure, and gas-absorption in concrete are observed for exploring permeation mechanism. The results illustrate that the narrowing pore-scale effect and surface-diffusion contribution derived from gas-absorption of CO2 and O2 both have minor impacts on the ka. The ka of O2 (kO2) is higher than that of CO2 (kCO2) and their relative permeability (kO2/kCO2) ranges from 1.18 to 2.29. These deviations are mainly caused by significantly different Knudson diffusion occurring in the area near the concrete outlet-gas side (approximately 5%). © 2021 |
关键词 | Carbon dioxide Fly ash Gas absorption Gas permeability Gases Oxygen Pore structure Apparent permeabilities Diffusion contributions Gas pressures Outlet gas Relative permeability Steady-state flows Structure characteristic Water to cement (binder) ratios |
DOI | 10.1016/j.cemconcomp.2021.103995 |
收录类别 | EI ; SCIE |
语种 | 英语 |
WOS研究方向 | Construction & Building Technology ; Materials Science |
WOS类目 | Construction & Building Technology ; Materials Science, Composites |
WOS记录号 | WOS:000636791200003 |
出版者 | Elsevier Ltd |
EI入藏号 | 20211010020638 |
EI主题词 | Concretes |
EI分类号 | 412 Concrete ; 802.3 Chemical Operations ; 804 Chemical Products Generally ; 804.2 Inorganic Compounds ; 931.2 Physical Properties of Gases, Liquids and Solids |
来源库 | WOS |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/147695 |
专题 | 兰州理工大学 |
通讯作者 | Zhang, Yunsheng |
作者单位 | 1.Southeast Univ, Jiangsu Key Lab Construct Mat, Nanjing 211189, Peoples R China; 2.Univ Lille, Lab Mecan Multiphys & Multiechel, LaMcube, CNRS,Cent Lille,FRE 2016, F-59000 Lille, France; 3.Suzhou Univ Sci & Technol, Sch Civil Engn, Suzhou 215011, Peoples R China; 4.Lanzhou Univ Technol, Coll Civil Engn, Lanzhou 730050, Gansu, Peoples R China |
通讯作者单位 | 土木工程学院 |
推荐引用方式 GB/T 7714 | Qian, Rusheng,Liu, Cheng,Liu, Guojian,et al. Effects of various inlet-gas mediums on apparent permeability of concrete under steady-state flow: Comparison between carbon-dioxide and oxygen[J]. Cement and Concrete Composites,2021,119. |
APA | Qian, Rusheng.,Liu, Cheng.,Liu, Guojian.,Liu, Zhiyong.,Pang, Bo.,...&Zhang, Yunsheng.(2021).Effects of various inlet-gas mediums on apparent permeability of concrete under steady-state flow: Comparison between carbon-dioxide and oxygen.Cement and Concrete Composites,119. |
MLA | Qian, Rusheng,et al."Effects of various inlet-gas mediums on apparent permeability of concrete under steady-state flow: Comparison between carbon-dioxide and oxygen".Cement and Concrete Composites 119(2021). |
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