气候变化领域集成服务门户(CCPortal): Pore characteristics of different phase in nano-modified concrete and their influences on the compressive strength

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DOI	10.1016/j.jobe.2021.103784
	Pore characteristics of different phase in nano-modified concrete and their influences on the compressive strength
	Ren, Jingge; Luo, Xiaoxiao; Bai, Ruiqiang; Pan, Chonggen; Zhang, Jun
通讯作者	Luo, XX (通讯作者)，South China Univ Technol, Guangzhou 510641, Guangdong, Peoples R China.
发表日期	2022
EISSN	2352-7102
卷号	46
英文摘要	To comprehensively understand the influence of nanoparticles on pore characteristics of concrete; vacuum saturation, mercury intrusion porosimetry and scanning electron microscopy were used to analyze the pore characteristics of concrete block, mortar phase and ITZ phase, respectively. The results indicated that with the best dosages nano-SiO (2) and nano-TiO (2) can reduce the porosity of concrete block by 15.6% and 3.5%, the porosity of cement mortar by 34.7% and 16.6%, and the porosity of ITZ by 92.0% and 65.6%, respectively. Besides, nanoparticles can also decrease the most probable pore aperture and the critical aperture in mortar phase, and can decrease the pore number in ITZ phase. After that, influences of these porosities on compressive strength have been analyzed by grey theory. Test results of compressive strength indicated that by reducing the porosities nano-SiO (2) and nano-TiO (2) can most improve the compressive strength by 15.79% and 9.22%, respectively. Correlation degrees between the porosities and the growth rate of compressive strength indicated that improving the structure of ITZ was the most effective mean to enhance the compressive strength by nanoparticles. Correlation degrees between the porosities and the compressive strength indicated that the porosity of mortar phase was a good choice to estimate the compressive strength. The studies were meaningful and helpful for investigating the properties of concrete by nanoparticles.
关键词	INTERFACIAL TRANSITION ZONE MECHANICAL-PROPERTIES MICROSTRUCTURAL PROPERTIES TIO2 NANOPARTICLES WATER-ABSORPTION CEMENT PASTE DURABILITY NANO-SIO2 NANOSILICA SIO2
英文关键词	Nano-modified concrete; Pore characteristic; Compressive strength
语种	英语
WOS研究方向	Construction & Building Technology ; Engineering
WOS类目	Construction & Building Technology ; Engineering, Civil
WOS记录号	WOS:000729553100003
来源期刊	JOURNAL OF BUILDING ENGINEERING
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/254528
作者单位	[Ren, Jingge; Pan, Chonggen; Zhang, Jun] NingboTech Univ, Ningbo 315100, Peoples R China; [Ren, Jingge; Bai, Ruiqiang] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China; [Luo, Xiaoxiao] South China Univ Technol, State Key Lab Subtrop Bldg Sci, Guangzhou 510641, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Ren, Jingge,Luo, Xiaoxiao,Bai, Ruiqiang,et al. Pore characteristics of different phase in nano-modified concrete and their influences on the compressive strength[J]. 中国科学院西北生态环境资源研究院,2022,46.
APA	Ren, Jingge,Luo, Xiaoxiao,Bai, Ruiqiang,Pan, Chonggen,&Zhang, Jun.(2022).Pore characteristics of different phase in nano-modified concrete and their influences on the compressive strength.JOURNAL OF BUILDING ENGINEERING,46.
MLA	Ren, Jingge,et al."Pore characteristics of different phase in nano-modified concrete and their influences on the compressive strength".JOURNAL OF BUILDING ENGINEERING 46(2022).