石墨烯-羧基化碳纳米管水泥基复合材料力学性能研究  

Mechanical Properties of Graphene-carboxylated Carbon Nanotubes Cement-based Composites

作　　者：王小凡 朱华[2] WANG Xiao-fan;ZHU Hua(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;College of Civil Engineering,Yancheng Institute of Technology,Yancheng 224002,China)

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]盐城工学院土木建筑工程学院,江苏盐城224051

出　　处：《混凝土与水泥制品》2022年第9期16-19,共4页China Concrete and Cement Products

基　　金：江苏省高等学校自然科学研究资助项目(21KJB560012);江苏省新型环保重点实验室开放基金项目(JBGS031);盐城工学院校级科研项目(xjr2021009)。

摘　　要：研究了不同质量比的石墨烯-羧基化碳纳米管对水泥基复合材料力学性能的影响。试验结果表明:掺入石墨烯(G)、羧基化碳纳米管(CNT)后,试件的抗压、抗折强度均出现了明显的提高;相较于单掺G和CNT,复掺0.05%的G和0.10%的CNT(G5C10)时,试件的抗压、抗折强度提高效果更显著,28 d的抗压、抗折强度达62.91 MPa和8.52 MPa,相较于对比组分别提高了37.5%和25.8%。MIP和SEM结果表明,G5C10为最佳掺入比例,此时试件的有害孔大幅减少,在微孔隙裂缝等薄弱区域形成致密化结构。The effects of different mass ratio of graphene-carboxylated carbon nanotubes on the mechanical properties of cement-based composites were studied.The test results show that the compressive strength and flexural strength of specimen increase obviously with the addition of graphene(G)carboxylated carbon nanotubes(CNT)composites.Compared with the specimen incorporated G or CNT,adding 0.10%CNT and 0.05%G is beneficial to improve its mechanical properties significantly,28 d compressive strength and flexural strength reaching 62.91 MPa and 8.52 MPa,increasing by 37.5%and 25.8%compared with the control group.The MIP and SEM results show that G5C10 group is the best ratio,at this time,the harmful pores of cement mortar are greatly reduced,and then a densification structure in the weak areas such as micro-pores and cracks can be formed.

关 键 词：石墨烯 羧基化碳纳米管 抗压强度 抗折强度 孔径分布 

分 类 号：TU528.07[建筑科学—建筑技术科学]