Influence of carbonation on chloride binding of mortars made with simulated marine sand

doi:10.1016/j.conbuildmat.2021.124455

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	Influence of carbonation on chloride binding of mortars made with simulated marine sand
	Sun, Ming 3,4,5; Sun, Congtao 1,2,3,4,5; Zhang, Peng 5; Liu, Nazhen 1,3,4; Li, Yantao 1,3,4; Duan, Jizhou 1,3,4; Hou, Baorong 1,3,4
刊名	CONSTRUCTION AND BUILDING MATERIALS
	2021-10-11
卷号	303 页码:11
关键词	Chloride binding Carbonation Simulated marine sand SCMs Friedel's salt
ISSN号	0950-0618
DOI	10.1016/j.conbuildmat.2021.124455
通讯作者	Sun, Congtao(sunct0830@sina.com) ; Zhang, Peng()
英文摘要	This study investigated the effects of carbonation on the chloride binding of mortars containing simulated marine sand. Various admixtures were added, and metakaolin (MK), fly ash (FA), nano-Al2O3 (NA), and aluminum (A) were considered as supplementary cementitious materials (SCMs) for use in mortars. Changes in free chloride content, total chloride content, bound chloride content, chloride binding rates, and pH values as a function of mortar depth were analyzed, and the effects of carbonation on the hydration products were also assessed. The results indicated that in the place of cement, SCMs could significantly increase the carbonation zone depth in mortar. The chloride ions migrated outward and inward under accelerated carbonation conditions in the mortar, generating two peak values for the chloride content in the mortars. Consequently, the incorporation of SCMs was beneficial for chloride ion migration in mortars under carbonation. Additionally, the bound chloride content and chloride binding rates were initially extremely low, then gradually increased, and finally stabilized with increased depth in the mortars under carbonation. Furthermore, the incorporation of SCMs resulted in the decreased chloride binding capacity of the mortars under accelerated carbonation, and Friedel's salt gradually decomposed with carbonation.
资助项目	Natural Science Key Foundation of Shandong Province[ZR2020KE046] ; Basic Science Research Project of Nantong City[JC2020125] ; National Natural Science Foundation of China for Exploring Key Scientific Instrument[41827805] ; Strategic Priority Project of CAS[XDA13040402]
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000696949200006
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/176409]
专题	海洋研究所_海洋腐蚀与防护研究发展中心
通讯作者	Sun, Congtao; Zhang, Peng
作者单位	1.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Nantong Res & Dev Ctr Marine Sci & Technol, Inst Oceanol, Nantong 226004, Peoples R China 3.Pilot Natl Lab Marine Sci & Technol Qingdao, Open Studio Marine Corros & Protect, Qingdao 266237, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China 5.Qingdao Univ Technol, Sch Civil Engn, Qingdao 266033, Peoples R China
推荐引用方式 GB/T 7714	Sun, Ming,Sun, Congtao,Zhang, Peng,et al. Influence of carbonation on chloride binding of mortars made with simulated marine sand[J]. CONSTRUCTION AND BUILDING MATERIALS,2021,303:11.
APA	Sun, Ming.,Sun, Congtao.,Zhang, Peng.,Liu, Nazhen.,Li, Yantao.,...&Hou, Baorong.(2021).Influence of carbonation on chloride binding of mortars made with simulated marine sand.CONSTRUCTION AND BUILDING MATERIALS,303,11.
MLA	Sun, Ming,et al."Influence of carbonation on chloride binding of mortars made with simulated marine sand".CONSTRUCTION AND BUILDING MATERIALS 303(2021):11.