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

IOCAS-IR

	Chloride-binding capacity of mortars composed of marine sand subjected to external chloride penetration
	Congtao SUN ; Ming SUN; Tao TAO ; Feng QU ; Gongxun WANG ; Peng ZHANG; Yantao LI ; Jizhou DUAN
发表期刊	Journal of Oceanology and Limnology
ISSN	2096-5508
	2022-07-15
出版年	2022
卷号	v.40 期号:04 页码:176-185
文献类型	CNKI期刊论文
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.
关键词	marine sand mortar chloride binding Friedel's salt pore structure
CNKI专辑号	A;B;C;
CNKI专辑名称	基础科学;工程科技Ⅰ辑;工程科技Ⅱ辑;
CNKI专题号	B015;C038;
CNKI专题名称	无机化工;建筑科学与工程;
分类号	TU528
收录类别	中科院核心 ; 中科院扩展
语种	英文;
资助项目(基金）	Supported by the Natural Science Key Foundation of Shandong Province (No. ZR2020KE046) ; the National Natural Science Foundation of China for Exploring Key Scientific Instrument (No. 41827805) ; the Basic Science Research Project of Nantong City (No. JC2020125) ; the Strategic Priority Project of CAS (No. XDA13040402)
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/187374
专题	中国科学院海洋研究所
作者单位	1.KeyLaboratoryofMarineEnvironmentalCorrosionandBio-fouling,InstituteofOceanology,ChineseAcademyofSciences 2.OpenStudioforMarineCorrosionandProtection,PilotNationalLaboratoryforMarineScienceandTechnology(Qingdao) 3.NantongResearchandDevelopmentCenterofMarineScienceandTechnology,InstituteofOceanology,ChineseAcademyofSciences 4.SchoolofCivilEngineering,QingdaoUniversityofTechnology 5.SchoolofCivilEngineering,HunanUniversityofScienceandTechnology
推荐引用方式 GB/T 7714	Congtao SUN,Ming SUN,Tao TAO,et al. Chloride-binding capacity of mortars composed of marine sand subjected to external chloride penetration. 2022.