气候变化领域集成服务门户(CCPortal): Research on the influencing mechanism of nano-silica on concrete performances based on multi-scale experiments and micro-scale numerical simulation

CCPortal

DOI	10.1016/j.conbuildmat.2021.125873
	Research on the influencing mechanism of nano-silica on concrete performances based on multi-scale experiments and micro-scale numerical simulation
	Wang, Chong; Zhang, Mingyi; Wang, Qicai; Dai, Jinpeng; Luo, Tao; Pei, Wansheng; Melnikov, Andrey; Zhang, Ze
通讯作者	Zhang, MY (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China.
发表日期	2022
ISSN	0950-0618
EISSN	1879-0526
卷号	318
英文摘要	In this study, multi-scale experiments and micro-scale numerical simulation were used to comprehensively analyze the influencing mechanism of nano-silica (NS) on the concrete performances. With the NS content increases, the results indicate that the concrete performances are improved first and then deteriorated, and the optimum NS content is 2%. By improving the physical and mechanical properties of cement paste and meliorating the interface transition zone (ITZ) structure, 2% NS increases the compressive strength of the concrete sample cured for 28 days by 23.04%. Meanwhile, it can be found that 2% NS makes the pore structure the most refined and maximizes the compactness of concrete through the nuclear magnetic resonance technology, making concrete the best resistance to chloride ion penetration. Through numerical simulation, it can be found that the concrete added with 2% NS has the better resistance to external force than the concrete without NS, and the reason for the improvement is that 2% NS enhances the mechanical properties of ITZ and mortar. Although 5% NS meliorates the ITZ structure, it deteriorates the physical and mechanical properties of cement paste, which makes the compressive strength of concrete sample cured for 28 days decrease by 7.91%.
关键词	RECYCLED AGGREGATE CONCRETE ELASTIC PROPERTIES FROST-RESISTANCE PORE STRUCTURE CEMENT MICROSTRUCTURE PERMEABILITY DURABILITY NANOSILICA INTERPHASE
英文关键词	Nano-silica; Concrete; Numerical simulation; Discrete element method; Multi scales
语种	英语
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
WOS类目	Construction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary
WOS记录号	WOS:000736964100002
来源期刊	CONSTRUCTION AND BUILDING MATERIALS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254102
作者单位	[Wang, Chong; Zhang, Mingyi; Pei, Wansheng; Zhang, Ze] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Wang, Chong; Zhang, Mingyi; Pei, Wansheng] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Wang, Qicai; Dai, Jinpeng] Lanzhou Jiaotong Univ, Natl & Prov Joint Engn Lab Rd & Bridge Disaster P, Lanzhou 730070, Peoples R China; [Luo, Tao] Xijing Univ, Xian 710123, Peoples R China; [Melnikov, Andrey] Russian Acad Sci, Melnikov Permafrost Inst, Siberian Branch, Yakutsk 677010, Russia; [Zhang, Ze] Northeast Forestry Univ, Sch Civil Engn, Inst Cold Reg Sci & Engn,Minist Educ, Northeast China Observ & Res Stn Permafrost Geoen, Harbin 150040, Peoples R China
推荐引用方式 GB/T 7714	Wang, Chong,Zhang, Mingyi,Wang, Qicai,et al. Research on the influencing mechanism of nano-silica on concrete performances based on multi-scale experiments and micro-scale numerical simulation[J]. 中国科学院西北生态环境资源研究院,2022,318.
APA	Wang, Chong.,Zhang, Mingyi.,Wang, Qicai.,Dai, Jinpeng.,Luo, Tao.,...&Zhang, Ze.(2022).Research on the influencing mechanism of nano-silica on concrete performances based on multi-scale experiments and micro-scale numerical simulation.CONSTRUCTION AND BUILDING MATERIALS,318.
MLA	Wang, Chong,et al."Research on the influencing mechanism of nano-silica on concrete performances based on multi-scale experiments and micro-scale numerical simulation".CONSTRUCTION AND BUILDING MATERIALS 318(2022).