摘要详情

ID / 提交时间

268 / 2022-08-31 21:21:15

标题

The Effect of Graphene Oxide on Dune Sand Cementitious Composites Reflected in Enhancing Freeze-Thaw Resistance: An Experimental Study

关键字

Graphene oxide,dune sand,cementitious composite,freeze-thaw resistance

主题及专题

期刊1

状态

摘要待审

作者

Youqun Wang / College of Hydraulic and Architectural Engineering, Shihezi University, Shihezi 832061, China.；Department of Civil Engineering, Tianjin University, Tianjin 300192, China.

Mingsheng He / College of Hydraulic and Architectural Engineering, Shihezi University, Shihezi 832061, China.

Ying Wang / College of Hydraulic and Architectural Engineering, Shihezi University, Shihezi 832061, China.

Jie Liu / Xinjiang Transportation Planning Surveying and Design Institute, Urumqi 830006, China.；Xinjiang Agricultural University School of Transportation and Logistics Engineering, Urumqi 830006, China

Jiefeng Liu / Department of Civil Engineering, Tianjin University, Tianjin 300192, China.

摘要

To promote the application of the imperfect but environment-friendly material in the construction industry, graphene oxide (GO) was proposed to improve the freeze-thaw resistance of dune sand cementitious composites (DSCC). In this study, several laboratory tests were conducted on the DSCC by incorporating GO dispersions with different concentrations. The effect of GO on freeze-thaw resistance of DSCC were investigated, based on which the mechanism was found out by microstructural analyses. The results showed that the weight loss and relative dynamic elastic modulus of the specimens with adding 0.06wt% of GO was at highest reduced by 90% and 30%, respectively, and the compressive strength of specimen with 0.04wt% of GO was enhanced by 59% compared with the control specimen after 150 freeze-thaw cycles. The enhancing effect of adding GO on the freeze-thaw resistance of DSCC was found to be attributed to the promotion of hydration and the control of internal structure. Besides, the reinforcement of GO on the interface between dune sand particles and cement matrix was find out, which may be the new evidence for testifying the GO enhancement on the freeze-thaw resistance of dune sand cementitious composites.