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DOI	10.1016/j.conbuildmat.2022.126708
	Exploring the effect of graphene oxide on freeze-thaw durability of air-entrained mortars
	Zeng, Hongyan; Lai, Yuanming; Qu, Shen; Yu, Fan
通讯作者	Lai, YM (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China.
发表日期	2022
ISSN	0950-0618
EISSN	1879-0526
卷号	324
英文摘要	Air-entrained agent (AE) has been recognized as the best way for improving the frost resistance of cement materials. However, its foaming ability could reduce compressive strength significantly. To enhance freeze-thaw durability without sacrificing mechanical performance, this study carries out in-door experiments by adding graphene oxide (GO) into air-entrained mortars, based on which the mechanism is explored by microstructural and numerical analyses. The test results show that 0.03 wt% GO (optimal dosage) can improve frost resistance and compressive strength of air-entrained mortars by 18.9% and 41.9%, respectively. According to microscopic tests, both AE and GO can reduce spacing factor, while an opposite trend on porosity is observed when AE and GO are added into mortars. To predict frozen deterioration, a thermal-hydro-mechanical model considering the influence of GO on water transport and nucleation rules during freeze-thaw process is firstly proposed. It implies that both water flow and self-compression illustrate the freeze-thaw damage. Through validating against the experimental data, the proposed model is proved to be reliable on simulating the deterioration of air-entrained mortars upon freezing, especially in case of sheet-like nano additives. Numerical result indicates that frost resistance can be continuously improved with increasing GO content if nano dispersibility is ignored, and thus remarkable enhancement will be achieved with the development of dispersion technology.
关键词	HYDRATED CEMENT SYSTEMS CONCRETE
英文关键词	Air-entrained mortar; Graphene oxide; Freeze-thaw durability; Mechanical property; Thermal-hydro-mechanical model
语种	英语
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
WOS类目	Construction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary
WOS记录号	WOS:000754222600001
来源期刊	CONSTRUCTION AND BUILDING MATERIALS
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/253882
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] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Zeng, Hongyan] Shaoxing Univ, Coll Civil Engn, Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing 312000, Peoples R China; [Qu, Shen] Lanzhou Jiaotong Univ, Key Lab Rd & Bridge & Underground Engn Gansu Prov, Lanzhou 730070, Peoples R China
推荐引用方式 GB/T 7714	Zeng, Hongyan,Lai, Yuanming,Qu, Shen,et al. Exploring the effect of graphene oxide on freeze-thaw durability of air-entrained mortars[J]. 中国科学院西北生态环境资源研究院,2022,324.
APA	Zeng, Hongyan,Lai, Yuanming,Qu, Shen,&Yu, Fan.(2022).Exploring the effect of graphene oxide on freeze-thaw durability of air-entrained mortars.CONSTRUCTION AND BUILDING MATERIALS,324.
MLA	Zeng, Hongyan,et al."Exploring the effect of graphene oxide on freeze-thaw durability of air-entrained mortars".CONSTRUCTION AND BUILDING MATERIALS 324(2022).