[1]郑睢宁,耿瑶,张豪,等.氧化石墨烯改性水泥基复合材料的路用性能[J].深圳大学学报理工版,2019,36(No.6(599-724)):614-620.[doi:10.3724/SP.J.1249.2019.06614]
 ZHENG Suining,GENG Yao,ZHANG Hao,et al.Road performance of cement-based composites modified by graphene oxide[J].Journal of Shenzhen University Science and Engineering,2019,36(No.6(599-724)):614-620.[doi:10.3724/SP.J.1249.2019.06614]
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氧化石墨烯改性水泥基复合材料的路用性能()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第36卷
期数:
2019年No.6(599-724)
页码:
614-620
栏目:
土木建筑工程
出版日期:
2019-11-20

文章信息/Info

Title:
Road performance of cement-based composites modified by graphene oxide
文章编号:
201906003
作者:
郑睢宁耿瑶张豪何锐
长安大学材料科学与工程学院,陕西西安,710061
Author(s):
ZHENG Suining GENG Yao ZHANG Hao and HE Rui
School of Materials Science and Engineering, Changan University, Xian 710061, Shaanxi Province, P.R.China
关键词:
建筑材料水泥基复合材料氧化石墨烯路用性能抗冻性改性机理
Keywords:
building materialscement-based compositesgraphene oxideroad performancefrost resistancemodification mechanism
分类号:
U414
DOI:
10.3724/SP.J.1249.2019.06614
文献标志码:
A
摘要:
为研究氧化石墨烯(graphene oxide,GO)对水泥基复合材料路用性能的影响,制备了含不同质量分数GO的改性水泥基复合材料,采用流动度、强度和抗冻性等指标评价其路用性能,结合扫描电镜(scanning electron microscope,SEM)与X射线衍射(X-ray diffraction,XRD)试验探究其改性机理.结果表明,GO改性水泥基复合材料力学性能和抗冻性增幅较大,流动度有所下降;GO质量分数为0.04%时,水泥基复合材料的强度最高,其28 d抗压与抗折强度较GO质量分数为0时,对照组分别提高了31.3%与44.2%;GO质量分数为0.02%时,抗冻性最好,冻融循环300 次后,质量损失率仅为0.6%,残留抗压与抗折强度比分别为69%和75%.微观分析可知,GO表面的含氧亲水基团(羟基、羧基等)可为水泥水化产物结晶提供生长点,硅酸钙凝胶(C-S-H)在其上生长、交联,并且随水化龄期增长交联作用日益增强,GO可以改善水泥基复合材料的力学性能和抗冻性.
Abstract:
In order to investigate the effect of graphene oxide (GO) on the road performance of cement-based composites,the modified cement-based composites with different content of GO were prepared,and the properties such as fluidity,strength and frost resistance were evaluated.The modification mechanism was investigated by scanning electron microscope (SEM) and X-ray diffraction (XRD).The results show that the addition of GO makes the fluidity decrease,while the mechanical properties and frost resistance of cement-based composites can be significantly improved.When the content of GO is 0.04% (by mass),the strength of cement-based composites is the highest, and the compressive and flexural strength increased by 31.3% and 44.2% compared with the group of the content of GO is 0 at 28 d.When the content of GO is 0.02%,the cement-based composites have the best frost resistance.After 300 cycles of freezing-thawing,the mass loss rate is only 0.6% as well as the residual compressive strength ratio and residual flexural strength ratio are 69% and 75%.According to the micro-analysis,oxygen-containing hydrophilic groups (hydroxyl group,carboxyl group,etc) on the surface of GO can provide growth points for the crystallization of cement hydration products and the C-S-H has grown and cross-linked on it.With the increasing of hydration age,the effect of cross-linking can be enhanced.Finally,the mechanical properties and frost resistance of cement-based composites can be improved with GO.

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备注/Memo

备注/Memo:
Received:2018-09-05;Revised:2019-03-11;Accepted:2019-05-11 Foundation:National Key Research and Development Plan (2017YFB0309903-02);National Natural Science Foundation of China(51508030);Basic Research Project of Qinghai Province(2017-ZJ-715) Corresponding author:Associate professor HE Rui.E-mail:heruia@163.com Citation:ZHENG Suining,GENG Yao, ZHANG Hao,et al.Road performance of cement-based composites modified by graphene oxide[J]. Journal of Shenzhen University Science and Engineering, 2019, 36(6): 614-620.(in Chinese)
更新日期/Last Update: 2019-11-30