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Experimental study of the effects of graphene oxide on microstructure and properties of cement paste composite
Composites Part A: Applied Science and Manufacturing ( IF 8.1 ) Pub Date : 2017-07-22 , DOI: 10.1016/j.compositesa.2017.07.022
Haibin Yang , Manuel Monasterio , Hongzhi Cui , Ningxu Han

Graphene oxide (GO) has been utilized to strengthen composite materials. In this study, the effects of GO on hydration degrees, macro-mechanical strength and calcium-silicate-hydrate (C-S-H) structure of cement based composites were investigated through comprehensive experimental tests. In addition, the aggregation mechanism of GO was verified by alkaline solution simulations, using Ca(OH)2 and NH3·H2O. Based on the experimental results, it was found that the 3-day and 7-day compressive strengths of cement based composites with 0.2 wt% of GO were increased by 35.7% and 42.3%, respectively as compared to the control. Moreover, the C-S-H structure of cement paste with GO was not observed to have undergone any change via qualitative and quantitative analyses combined with FT-IR, XRD and 29Si-NMR. Besides, the test results of TGA, DTG and 29Si-NMR showed that the hydrated degree of cement paste increased to 10.4% at 28 days when incorporating with 0.1% of GO.



中文翻译:

氧化石墨烯对水泥浆体复合材料微观结构和性能影响的实验研究

氧化石墨烯(GO)已用于增强复合材料。在这项研究中,通过全面的实验测试,研究了GO对水泥基复合材料的水合度,宏观机械强度和硅酸钙水合物(CSH)结构的影响。另外,使用Ca(OH)2和NH 3 ·H 2通过碱性溶液模拟验证了GO的聚集机理。O.基于实验结果,发现具有0.2wt%GO的水泥基复合材料的3天和7天抗压强度与对照相比分别增加了35.7%和42.3%。此外,结合FT-IR,XRD和29 Si-NMR进行定性和定量分析,未观察到具有GO的水泥浆的CSH结构发生任何变化。另外,TGA,DTG和29 Si-NMR测试结果表明,当掺入0.1%的GO时,水泥浆的水合度在28天时增加到10.4%。

更新日期:2017-07-22
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