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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 SYSTEMSCONCRETE |
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). |
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