气候变化领域集成服务门户(CCPortal): Study on the durability and failure mechanism of concrete modified with nanoparticles and polypropylene fiber under freeze-thaw cycles and sulfate attack

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DOI	10.1016/j.coldregions.2021.103301
	Study on the durability and failure mechanism of concrete modified with nanoparticles and polypropylene fiber under freeze-thaw cycles and sulfate attack
	Ren, Jingge; Lai, Yuanming
发表日期	2021
ISSN	0165-232X
EISSN	1872-7441
卷号	188
英文摘要	Nano-SiO2, nano-TiO2 and polypropylene fiber were added to concrete to investigate the durability and failure mechanism of the concrete under freeze-thaw cycles and sulfate attack. Compressive strength, mass change, microstructure and pore characteristics were measured to evaluate the durability of the samples. The results indicated that polypropylene fiber can best improve the durability of concrete by 67% due to its bridging effect. Nanoparticles can only improve the durability of concrete within 120 cycles and cannot enhance the long-term frost resistance. A frost-salt heaving-corrosion composite failure theory was proposed to explain the failure mechanism of concrete under the frost and sulfate attack. The theory indicated that water freezing bring more damages than sodium sulfate do and pore characteristic is the most important factor affecting durability.
英文关键词	Nanoparticles; Polypropylene fiber; Freeze-thaw cycles; Sulfate attack; Failure mechanism
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS关键词	FLY-ASH CONCRETE ; TIO2 NANOPARTICLES ; FROST-RESISTANCE ; CHLORIDE ; SILICA ; TEMPERATURE ; COMPOSITES ; MICRO ; WATER
WOS记录号	WOS:000660572100002
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239554
作者单位	[Ren, Jingge] NingboTech Univ, Ningbo 315100, Peoples R China; [Ren, Jingge; Lai, Yuanming] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China; [Ren, Jingge; Lai, Yuanming] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Ren, Jingge,Lai, Yuanming. Study on the durability and failure mechanism of concrete modified with nanoparticles and polypropylene fiber under freeze-thaw cycles and sulfate attack[J],2021,188.
APA	Ren, Jingge,&Lai, Yuanming.(2021).Study on the durability and failure mechanism of concrete modified with nanoparticles and polypropylene fiber under freeze-thaw cycles and sulfate attack.COLD REGIONS SCIENCE AND TECHNOLOGY,188.
MLA	Ren, Jingge,et al."Study on the durability and failure mechanism of concrete modified with nanoparticles and polypropylene fiber under freeze-thaw cycles and sulfate attack".COLD REGIONS SCIENCE AND TECHNOLOGY 188(2021).