Chloride-binding capacity of mortars composed of marine sand subjected to external chloride penetration

doi:10.1007/s00343-021-1144-4

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	Chloride-binding capacity of mortars composed of marine sand subjected to external chloride penetration
	Sun, Congtao 2,3,4; Sun, Ming 2,4,5; Tao, Tao 1; Qu, Feng 1; Wang, Gongxun 1; Zhang, Peng 5; Li, Yantao 2; Duan, Jizhou 2
刊名	JOURNAL OF OCEANOLOGY AND LIMNOLOGY
	2022-05-31
页码	10
关键词	marine sand mortar chloride binding Friedel's salt pore structure
ISSN号	2096-5508
DOI	10.1007/s00343-021-1144-4
通讯作者	Sun, Congtao(suncongtao@qdio.ac.cn) ; Qu, Feng()
英文摘要	In order to explore the interactional relations of internal chloride and external chloride-binding amongst the cementitious materials, the chloride-binding capacity of mortars composed of marine sand (MS) or washed marine sand (WMS) were investigated. Results indicate that more external chloride can penetrate and diffuse more deeply into the WMS mortar than that in the MS mortar. This phenomenon suggests that the external chloride migration resistance due to WMS is lower than that caused by MS. The distribution trends of the bound chloride content in the two types of mortars are the same at different immersion times. However, a significantly decreased area of the bound chloride content exists at the border of the external penetration area (EPA) and the external unaffected area (EUA) at the immersion ages of 3 and 7 d, and then it disappears gradually with immersion time. The WMS mortar can bind more external chloride, whereas the MS mortar can bind more internal chloride, at different immersion times. The distributions of bound chloride conversion rate in the EPAs of the two types of mortars differ across immersion times. The distribution firstly decreases, and then it increases at the immersion ages of 3 and 7 d. The distribution was from increase, then decreases, and increase again at the immersion ages of 28 and 56 d. The bound chloride conversion rate in the WMS mortar is affected more greatly by external chloride penetration than that in the MS mortar. The amounts of the Friedel's salt tend to increase with prolonged immersion time. Finally, the penetration of external chloride can increase the amount of fine capillary pores smaller than 100 nm in the WMSmortar exposed for 56 d in the chloride salt solution (WMS-E) specimen.
资助项目	Natural Science Key Foundation of Shandong Province[ZR2020KE046] ; National Natural Science Foundation of China[41827805] ; Basic Science Research Project of Nantong City[JC2020125] ; Strategic Priority Project of CAS[XDA13040402]
WOS研究方向	Marine & Freshwater Biology ; Oceanography
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000803813500005
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/179308]
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; Qu, Feng
作者单位	1.Hunan Univ Sci & Technol, Sch Civil Engn, Xiangtan 411201, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China 3.Chinese Acad Sci, Nantong Res & Dev Ctr Marine Sci & Technol, Inst Oceanol, Nantong 226004, Peoples R China 4.Pilot Natl Lab Marine Sci & Technol Qingdao, Open Studio Marine Corros & Protect, Qingdao 266237, 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, Congtao,Sun, Ming,Tao, Tao,et al. Chloride-binding capacity of mortars composed of marine sand subjected to external chloride penetration[J]. JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2022:10.
APA	Sun, Congtao.,Sun, Ming.,Tao, Tao.,Qu, Feng.,Wang, Gongxun.,...&Duan, Jizhou.(2022).Chloride-binding capacity of mortars composed of marine sand subjected to external chloride penetration.JOURNAL OF OCEANOLOGY AND LIMNOLOGY,10.
MLA	Sun, Congtao,et al."Chloride-binding capacity of mortars composed of marine sand subjected to external chloride penetration".JOURNAL OF OCEANOLOGY AND LIMNOLOGY (2022):10.