DOI: 10.1016/j.jcou.2018.07.012
Scopus记录号: 2-s2.0-85050382022
论文题名: Surface scaling of CO2-cured concrete exposed to freeze-thaw cycles
作者: Zhang D. ; Shao Y.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 27 起始页码: 137
结束页码: 144
语种: 英语
英文关键词: CO2 curing
; CO2 sequestration
; Concrete durability
; Fly ash
; Freeze-thaw scaling
Scopus关键词: Carbon dioxide
; Curing
; Durability
; Fly ash
; Freezing
; Gas adsorption
; Pore size
; Portland cement
; Thawing
; CO2 curing
; CO2 sequestration
; Concrete durability
; Concrete materials
; Freeze-thaw
; Freeze-thaw cycles
; Mercury intrusion porosimetry
; Nitrogen adsorption
; Concretes
英文摘要: Surface scaling of concrete is one of the major durability issues for cold-region concrete materials. This study presents a solution of using CO2 curing to mitigate the concrete surface salt scaling induced by the freeze-thaw exposure. A laboratory freeze-thaw cyclic test was performed on the concrete made with Portland cement and fly ash. To understand the underlying mechanism, the pore structure of cement paste was evaluated by mercury intrusion porosimetry (MIP) and nitrogen adsorption/desorption (NAD). It was found that the total pore volume and pore size were noticeably reduced in the CO2-cured samples. CO2 curing leads to a dramatic refinement of the capillary pores, hence lessening the available microporous space for the ice formation. The densified concrete surface accounts for the enhanced resistance to the surface scaling. © 2018 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111785
Appears in Collections: 气候减缓与适应
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作者单位: Department of Civil Engineering and Applied Mechanics, McGill University, 817 Sherbrooke Street West, Montreal, QC H3A 2K6, Canada; Department of Civil and Environmental Engineering, University of Michigan, EWRE, 1351 Beal Avenue, Ann Arbor, MI 48109, United States
Recommended Citation:
Zhang D.,Shao Y.. Surface scaling of CO2-cured concrete exposed to freeze-thaw cycles[J]. Journal of CO2 Utilization,2018-01-01,27