DOI: 10.1016/j.jcou.2018.11.004
Scopus记录号: 2-s2.0-85056848379
论文题名: Carbonation of concrete made with high amount of fly ash and recycled concrete aggregates for utilization of CO2
作者: Kurda R. ; De Brito J. ; Silvestre J.D.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2019
卷: 29 起始页码: 12
结束页码: 19
语种: 英语
英文关键词: Carbonation
; Concrete
; Fly ash
; Recycled concrete aggregates
; Sustainability
Scopus关键词: Carbon dioxide
; Carbonation
; Chlorine compounds
; Compressive strength
; Concrete mixers
; Concrete reinforcements
; Concretes
; Fly ash
; High performance concrete
; Recycling
; Sustainable development
; Water absorption
; Carbonation depth
; Carbonation resistance
; Chloride ion penetration
; Combined effect
; Conventional concrete
; Incorporation ratio
; Low- and high-strength concretes
; Recycled concrete aggregates
; Concrete aggregates
英文摘要: This paper mainly focuses the effect of high incorporation ratios of fly ash (FA) and recycled concrete aggregates (RCA) on the carbonation resistance of concrete. The aim of using high volumes of these non-traditional materials is to decrease the use of natural resources and capture CO2. For that purpose, the carbonation resistance of low- and high-strength concrete mixes produced with various incorporation ratios of FA, fine RCA and coarse RCA, jointly and individually, is obtained and related with compressive strength, water absorption and chloride ion penetration. The results show that the carbonation depth of concrete increased up to 3 and 6 times when incorporating 30% and 60% of FA, respectively, and 100% of RCA led to up to 2.7 times increment. Therefore, the concrete cover for mixes made with FA and/or RCA should be increased in order to obtain an equivalent service life to that of conventional concrete. In spite of this fact, it is recommended to incorporate FA in RCA concrete because, in most concrete mixes, the carbonation depth due to the combined effect of both RCA and FA was lower than the sum of the values due to each effect. Additionally, the results show that, although the carbonation rate of concrete mixes containing high volumes of FA and RCA is high, their service life is also relatively high and the concrete reinforcement can be protected for up to 50 years. © 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/117332
Appears in Collections: 气候变化与战略
There are no files associated with this item.
Recommended Citation:
Kurda R.,De Brito J.,Silvestre J.D.. Carbonation of concrete made with high amount of fly ash and recycled concrete aggregates for utilization of CO2[J]. Journal of CO2 Utilization,2019-01-01,29