[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(6):614-620.[doi:10.3724/SP.J.1249.2019.06614]
　ZHENG Suining,GENG Yao,ZHANG Hao,et al.Road performance of graphene oxide modified cement-based composites[J].Journal of Shenzhen University Science and Engineering,2019,36(6):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年第6期
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 graphene oxide modified cement-based composites
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
building materials; cement-based composites; graphene oxide; road performance; frost resistance; modification mechanism
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 materials; cement-based composites; graphene oxide; road performance; frost resistance; modification 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GO水泥基复合材料路用性能，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的对照组分别提高了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 pavement performance of cement-based composites，modified cement-based composites with different content of GO were prepared，and the pavement performance was evaluated by the fluidity，strength and frost resistance．The modification mechanism was investigated by scanning electron microscope (SEM) and X-ray diffraction．The results show that the mechanical properties and frost resistance of GO modified cement-based composites increase greatly and the fluidity decreases．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 of the composites at 28 d increase by 31.3% and 44.2% compared with the group with the content of GO of 0．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% respectively．According to the micro-analysis，oxygen-containing hydrophilic groups (hydroxyl group，carboxyl group，etc) on the GO surface can provide growing points for the crystallization of cement hydration products and the calcium silicate gel (C-S-H) grows and cross-links on it and the effect of cross-linking increases with the hydration age．GO can improve the mechanical properties and frost resistance of cement-based composites．

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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 R&D 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 graphene oxide modified cement-based composites［J］. Journal of Shenzhen University Science and Engineering, 2019, 36(6): 614-620.（in Chinese）
基金项目：国家重点研发计划资助项目(2017YFB0309903-02)；国家自然科学基金资助项目（51508030）；青海省基础研究计划资助项目（2017-ZJ-715）
作者简介：郑睢宁（1993—），长安大学硕士研究生．研究方向：道路工程材料．E-mail：zhengsuining@163.com
引文：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(6)：614-620.
更新日期/Last Update: 2019-11-30