气候变化领域集成服务门户(CCPortal): Influence of nano-silica on the performances of concrete under the negative-temperature curing condition

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DOI	10.1016/j.coldregions.2021.103357
	Influence of nano-silica on the performances of concrete under the negative-temperature curing condition
	Wang, Chong; Zhang, Mingyi; Wang, Qicai; Zhang, Rongling; Pei, Wansheng; Zhou, Yanqiao
发表日期	2021
ISSN	0165-232X
EISSN	1872-7441
卷号	191
英文摘要	In previous studies, nano-silica (NS) can improve the concrete performances under the conventional curing condition (about 20 degrees C). However, because more and more engineering projects are constructed in cold regions, it is very important to study the performances of concrete, which is cured under the negative-temperature condition. In order to explore whether NS still has the positive effect on concrete cured under the negativetemperature condition, multi-scale experiments were conducted to investigate the influence of NS on the performances (mechanics, resistance to chloride ion penetration (RCP) ability, pore characteristics, microstructure, and hydration products) of the concrete cured under the condition of -3 degrees C. The results indicate that the negative-temperature curing condition is not conducive to the formation of compressive strength for concrete. Under the curing condition of -3 degrees C, the cement paste and the interface transition zone are deteriorated by the addition of NS, which reduces the compressive strength of concrete. In addition, as the increase of the NS content added into the concrete under the curing condition of -3 degrees C, the compressive strength, the RCP ability, and the amount of calcium hydroxide generated decrease, and the coarsening of pore structure increases.
英文关键词	Nano-silica; Negative temperature; Curing condition; Concrete; Cement paste
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS关键词	FLUID TRANSPORT-PROPERTIES ; OIL FUEL ASH ; COMPRESSIVE STRENGTH ; WATER PERMEABILITY ; MICROSTRUCTURAL PROPERTIES ; DURABILITY PERFORMANCES ; ELASTIC PROPERTIES ; PORE STRUCTURE ; CEMENT ; AGGREGATE
WOS记录号	WOS:000691239200004
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
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/240151
作者单位	[Wang, Chong; Zhang, Mingyi; Pei, Wansheng; Zhou, Yanqiao] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Wang, Chong; Zhang, Mingyi; Pei, Wansheng; Zhou, Yanqiao] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Wang, Qicai; Zhang, Rongling] Lanzhou Jiaotong Univ, Natl & Prov Joint Engn Lab Rd & Bridge Disaster P, Lanzhou 730070, Peoples R China
推荐引用方式 GB/T 7714	Wang, Chong,Zhang, Mingyi,Wang, Qicai,et al. Influence of nano-silica on the performances of concrete under the negative-temperature curing condition[J]. 中国科学院西北生态环境资源研究院,2021,191.
APA	Wang, Chong,Zhang, Mingyi,Wang, Qicai,Zhang, Rongling,Pei, Wansheng,&Zhou, Yanqiao.(2021).Influence of nano-silica on the performances of concrete under the negative-temperature curing condition.COLD REGIONS SCIENCE AND TECHNOLOGY,191.
MLA	Wang, Chong,et al."Influence of nano-silica on the performances of concrete under the negative-temperature curing condition".COLD REGIONS SCIENCE AND TECHNOLOGY 191(2021).