Effect of High-Dispersible Graphene on the Strength and Durability of Cement Mortars
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Department of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
2
Key Laboratory for Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing 100044, China
3
School of Highway, Chang’an University, Chang’an 710061, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Luigi Coppola
Materials 2021, 14(4), 915; https://doi.org/10.3390/ma14040915
Received: 11 January 2021
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Revised: 8 February 2021
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Accepted: 10 February 2021
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Published: 15 February 2021
Graphene’s outstanding properties make it a potential material for reinforced cementitious composites. However, its shortcomings, such as easy agglomeration and poor dispersion, severely restrict its application in cementitious materials. In this paper, a highly dispersible graphene (TiO2-RGO) with better dispersibility compared with graphene oxide (GO) is obtained through improvement of the graphene preparation method. In this study, both GO and TiO2-RGO can improve the pore size distribution of cement mortars. According to the results of the mercury intrusion porosity (MIP) test, the porosity of cement mortar mixed with GO and TiO2-RGO was reduced by 26% and 40%, respectively, relative to ordinary cement mortar specimens. However, the TiO2-RGO cement mortars showed better pore size distribution and porosity than GO cement mortars. Comparative tests on the strength and durability of ordinary cement mortars, GO cement mortars, and TiO2-RGO cement mortars were conducted, and it was found that with the same amount of TiO2-RGO and GO, the TiO2-RGO cement mortars have nearly twice the strength of GO cement mortars. In addition, it has far higher durability, such as impermeability and chloride ion penetration resistance, than GO cement mortars. These results indicate that TiO2-RGO prepared by titanium dioxide (TiO2) intercalation can better improve the strength and durability performance of cement mortars compared to GO.
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Keywords:
graphene oxide; high-dispersion graphene; cement mortars; pore structure; strength; durability
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MDPI and ACS Style
Qi, X.; Zhang, S.; Wang, T.; Guo, S.; Ren, R. Effect of High-Dispersible Graphene on the Strength and Durability of Cement Mortars. Materials 2021, 14, 915. https://doi.org/10.3390/ma14040915
AMA Style
Qi X, Zhang S, Wang T, Guo S, Ren R. Effect of High-Dispersible Graphene on the Strength and Durability of Cement Mortars. Materials. 2021; 14(4):915. https://doi.org/10.3390/ma14040915
Chicago/Turabian StyleQi, Xiaoqiang, Sulei Zhang, Tengteng Wang, Siyao Guo, and Rui Ren. 2021. "Effect of High-Dispersible Graphene on the Strength and Durability of Cement Mortars" Materials 14, no. 4: 915. https://doi.org/10.3390/ma14040915
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