文献类型：期刊文献

英文题名：Effect of graphene oxide on mechanical properties of UHPC and analysis of micro-control mechanism

作者：Yeke, Luo[1];Yu, Zhouping[2,3]

机构：[1]Zhejiang Ind Polytech Coll, Shaoxing 312000, Peoples R China;[2]Changsha Univ Sci & Technol, Coll Civil Engn, Changsha 410076, Peoples R China;[3]Shaoxing Univ, Yuanpei Coll, Shaoxing 312000, Peoples R China

年份：2021

卷号：8

期号：9

外文期刊名：MATERIALS RESEARCH EXPRESS

收录：SCI-EXPANDED(收录号：WOS:000692009500001)、、EI(收录号：20213710897574)、Scopus(收录号：2-s2.0-85114843787)、WOS

基金：Financial support from the National Natural Science Foundation of China (41572305), Construction Research Project of Zhejiang Province (2019K148), General Research Project of Education Department of Zhejiang Province (Y201941058) are gratefully acknowledged.

语种：英文

外文关键词：graphene oxide; ultra high performance concrete; mechanical properties; microstructure

外文摘要：Recently, graphene oxide (GO) is one of the nanomaterials that enhance the performance of cement-based materials. In this paper, the effects of different mass of GO on the workability and mechanical properties of UHPC is studied, and its mechanism is explored by micro-nano analysis methods such as XRD, SEM, MIP and nano indentation. The results show that, compared with the reference group, the 0.04% GO addition reduces the fluidity of UHPC, reduces the initial and final setting time of slurry, and enhance the compressive strength, flexural strength and tensile strength of the sample at 28d by 15.8%, 14% and 15.3%, respectively. Micro-nano analysis results show that GO promotes cement hydration, reduces the porosity of UHPC, improves the microstructure of the interface transition zone between steel fiber and matrix, and improves the nano-mechanical properties. This is mainly attributed to the nucleation effect of GO and interfacial bonding with C-S-H gel.