DOI: 10.1016/j.jcou.2018.08.025
Scopus记录号: 2-s2.0-85053118853
论文题名: Characterization of Mg components in reactive MgO - Portland cement blends during hydration and carbonation
作者: Zhang R. ; Bassim N. ; Panesar D.K.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 27 起始页码: 518
结束页码: 527
语种: 英语
英文关键词: Accelerated carbonation
; Amorphous hydrated Mg carbonate
; Hydration
; Reactive MgO
Scopus关键词: Carbonation
; Hydration
; Mechanical properties
; Portland cement
; Silicates
; Accelerated carbonation
; Amorphous phase
; Binder systems
; Hydration products
; Hydrotalcites
; Magnesium silicates
; Nesquehonite
; Replacement level
; Magnesia
英文摘要: A carbonated binder system containing reactive MgO (r-MgO) and Portland cement (PC) has the potential to provide sufficient mechanical properties and reduce carbon the footprint. However, the understanding of the chemistry of hydration and carbonation of the r-MgO-PC system remains unclear. The purpose of this study is to characterize the Mg components that form blends of r-MgO and PC during hydration and carbonation. Paste specimens of r-MgO and PC with r-MgO replacement levels from 10% to 90% were cast, carbonated and examined. Experimental observations reveal that: (1) nesquehonite only occurs in the carbonated r-MgO-PC paste with r-MgO replacement ≥ 60%; (2) an amorphous phase of hydrated Mg carbonate was identified in the carbonated paste with 50% r-MgO replacement; and (3) hydrotalcite and magnesium silicate hydrate are major hydration products of r-MgO during the hydration of the paste containing 30% and 40% r-MgO, which are expected to be the precursors of amorphous hydrated Mg carbonate. © 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/111797
Appears in Collections: 气候减缓与适应
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作者单位: Dept of Civil and Mineral Engineering, University of Toronto, 35 St. George St., Toronto, ON M5S 1A4, Canada; Dept of Materials Science and Engineering, McMaster University, Hamilton, ON L8S 4L8, Canada
Recommended Citation:
Zhang R.,Bassim N.,Panesar D.K.. Characterization of Mg components in reactive MgO - Portland cement blends during hydration and carbonation[J]. Journal of CO2 Utilization,2018-01-01,27