Graphene Oxide Controlled Cement Materials Formation of Large-scale Ordered Structure and Its Properties Characterization
LU Shenghua1,2, LUO Xiaoqian1, ZHANG Jia1, GAO Dangguo3, SUN Li1, HU Haoyan1
1 College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi’an 710021; 2 National Demonstration Center for Experimental Light Chemistry Engineering Education (Shaanxi University of Science and Technology), Xi’an 710021; 3 Materials Institute, Shaanxi Machinery Research Institute, Xianyang 712000
Abstract: The cement composites was prepared by ultrasonic processing of prepared graphene oxide (GO) and polycarboxylate superplasticizer (PCs) in mixing water. The research results indicate that GO has been evenly dispersed in cement matrix and the cement hydration products became uniform polyhedron-shaped crystals and formed large-scale ordered and compact microstructure within the bulk cement. A 0.03% GO with size range of 30—190 nm resulted in compressive and flexural strengths increase rate of 78.8% and 112.7%, compared with the control sample. In constrast to GO with size range of 110—410 nm, the corresponding increase rate was 72.3% and 93.9%, respectively. Their durability has significantly improved compared to the control sample. Meanwhile, the forming mechanism of ordered crystals and structure was proposed.
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