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DOI	10.1021/acsanm.0c01885
	Graphene Oxide-Enhanced Cementitious Materials under External Sulfate Attack: Implications for Long Structural Life
	Zeng, Hongyan; Lai, Yuanming; Qu, Shen; Qin, Yinghong
发表日期	2020
ISSN	2574-0970
起始页码	9784
结束页码	9795
卷号	3 期号:10
英文摘要	Graphene oxide (GO) nanosheets are experimentally added into cement materials to enhance the sulfate resistance, and a corresponding chemomechanical model is proposed to predict the structural life expectancy. Experimental investigations show that GO nanosheets with a dosage of 0.03% by weight of cement refine the pores, inhibit the microcracks, and improve sulfate resistance of mortars remarkably. The proposed model is designed for cement materials modified by nanosheets, including the influence of the size, concentration, arrangement, and direction of nanosheets on the tortuosity and diffusion coefficient. To explain the mechanical deterioration, the model considers the transport properties at undamaged, pore-filling, stress-generated, and crack-growing stages. Validating against the experimental data, we found the proposed model to be more suitable than the Mobasher-Tixier (MT) model in simulating the response of cement-based materials under sulfate attack, especially in the case of sheet-like nanoadditives. Numerical results infer that the addition of 0.03 wt % GO nanosheets can improve the structural life by 2.3 times as samples are immersed in 5 wt % sulfate solution.
英文关键词	graphene oxide; cement materials; sulfate attack; microstructure; transport property; chemomechanical model
语种	英语
WOS研究方向	Science & Technology - Other Topics ; Materials Science
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS关键词	MECHANICAL-PROPERTIES ; BARRIER PROPERTIES ; REINFORCED CEMENT ; CONCRETE ; DURABILITY ; NANOSHEETS ; DAMAGE ; MICROSTRUCTURE ; DIFFUSIVITY ; RESISTIVITY
WOS记录号	WOS:000583331600084
来源期刊	ACS APPLIED NANO MATERIALS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239560
作者单位	[Zeng, Hongyan; Lai, Yuanming] Chinese Acad Sci, State Key Lab Frozen Soil Engn, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China; [Zeng, Hongyan; Lai, Yuanming] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Qu, Shen] Lanzhou Jiaotong Univ, Key Lab Rd & Bridge & Underground Engn Gansu Prov, Lanzhou 730070, Peoples R China; [Qin, Yinghong] Guangxi Univ, Coll Civil Engn & Architecture, Nanning 530004, Guangxi, Peoples R China
推荐引用方式 GB/T 7714	Zeng, Hongyan,Lai, Yuanming,Qu, Shen,et al. Graphene Oxide-Enhanced Cementitious Materials under External Sulfate Attack: Implications for Long Structural Life[J],2020,3(10).
APA	Zeng, Hongyan,Lai, Yuanming,Qu, Shen,&Qin, Yinghong.(2020).Graphene Oxide-Enhanced Cementitious Materials under External Sulfate Attack: Implications for Long Structural Life.ACS APPLIED NANO MATERIALS,3(10).
MLA	Zeng, Hongyan,et al."Graphene Oxide-Enhanced Cementitious Materials under External Sulfate Attack: Implications for Long Structural Life".ACS APPLIED NANO MATERIALS 3.10(2020).