气候变化领域集成服务门户(CCPortal): Effect of graphene oxide on permeability of cement materials: An experimental and theoretical perspective

CCPortal

DOI	10.1016/j.jobe.2021.102326
	Effect of graphene oxide on permeability of cement materials: An experimental and theoretical perspective
	Zeng, Hongyan; Lai, Yuanming; Qu, Shen; Yu, Fan
发表日期	2021
ISSN	2352-7102
卷号	41
英文摘要	In this paper, two kinds of graphene oxide (GO) nanosheets are adopted as additives to reduce the permeability of cement mortars. The structural characteristics of the two GO-modified mortars are compared with a reference sample based on ultrasonic and microscopic analyses. The test results show that 0.06 wt% GO-1 (aspect ratio is 50000) and GO-2 (aspect ratio is 5000) reduce relative permeability coefficient by 80.2% and 41.0%, respectively. Moreover, nanosheets, especially with large aspect ratio, refine capillary pores, regularize hydrated crystals morphology and inhibit microcracks remarkably. To explore the mechanism, a permeability-tortuosity model with considerations of dosage, aspect ratio and arrangement of nanosheets is proposed and validated against the experimental data. For predicting the evolution of structural parameters, theoretical correlations among ultrasonic pulse velocity, porosity and permeability are conducted. It implies that ultrasonic pulse velocity in saturated GO-cement mortar is more sensitive to the change of porosity than that in dry sample when the porosity is smaller than 17%. The proposed model highlights that nanosheets with relatively larger aspect ratio are more helpful for reducing permeability. For case with the application of 0.06 wt% dosage and normal arrangement, the relative permeability ratio is reduced by 80.6% if aspect ratio is increased by 10 times.
英文关键词	Mortars; Graphene oxide; Permeability; Ultrasonic pulse velocity; Microstructure
语种	英语
WOS研究方向	Construction & Building Technology ; Engineering
WOS类目	Construction & Building Technology ; Engineering, Civil
WOS关键词	MECHANICAL-PROPERTIES ; WATER PERMEABILITY ; REINFORCED CEMENT ; CONCRETE ; MICROSTRUCTURE ; POROSITY ; MORTAR ; COMPOSITES ; TORTUOSITY ; NANOSHEETS
WOS记录号	WOS:000663411400003
来源期刊	JOURNAL OF BUILDING ENGINEERING
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239553
作者单位	[Zeng, Hongyan; Lai, Yuanming; Yu, Fan] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Zeng, Hongyan; Lai, Yuanming; Yu, Fan] 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; [Qu, Shen] 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	Zeng, Hongyan,Lai, Yuanming,Qu, Shen,et al. Effect of graphene oxide on permeability of cement materials: An experimental and theoretical perspective[J],2021,41.
APA	Zeng, Hongyan,Lai, Yuanming,Qu, Shen,&Yu, Fan.(2021).Effect of graphene oxide on permeability of cement materials: An experimental and theoretical perspective.JOURNAL OF BUILDING ENGINEERING,41.
MLA	Zeng, Hongyan,et al."Effect of graphene oxide on permeability of cement materials: An experimental and theoretical perspective".JOURNAL OF BUILDING ENGINEERING 41(2021).