| SPECIAL TOPIC: UHPC MATERIAL AND ENGINEERING APPLICATION |
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| High/Ultra-high Performance Graphene Oxide/Cement-based Composites with Large-scale, Ordered and Compact Flower-like Microstructures |
| LU Shenghua1, 2, SUN Li1, ZHANG Jia1, HU Haoyan1, LEI Ying1, HOU Yonggang1
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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; |
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Abstract The high-and ultra-high-performance cement composites (HPC and UHPC) were prepared by doping graphene oxide (GO) and varying water-cement ratio. When water-cement ratio is 0.26 and GO dosage is 0.03% and 0.05%, the compressive and flexural strength of HPC were 125.6 MPa, 146.7 MPa and 15.6 MPa, 18.3 MPa, respectively. And while water-cement ratio is 0.18 and with 0.03% and 0.05% GO, the compressive and flexural strength were 168.6 MPa, 181.3 MPa and 26.9 MPa and 29.4 MPa, respectively. The penetration resistance, freeze-thaw resistance and carbonation resistance of the cement composites got remarkably improved by properly adding GO. The regular-shaped crystals of cement hydration products which gathered to form ordered and compact microstructures were observed in SEM microscopic morphology. XRD results indicated that the regular-shaped hydration crystals were constructed by complexing and hybridizing.of cement hydration crystals.
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Published: 10 December 2017
Online: 2018-05-08
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2017, Vol. 31 
