Enhancing ultra-early strength of sulphoaluminate cement-based materials by incorporating graphene oxide

• Published in: Nanotechnology reviews (Berlin) Vol. 9; no. 1; pp. 17 - 27
• Main Authors: Liu, Yushi, Jia, Minjie, Song, Chengzhe, Lu, Shuang, Wang, Hui, Zhang, Guanhua, Yang, Yingzi
• Format: Journal Article
• Language: English
• Published: Berlin De Gruyter 01.01.2020; Walter de Gruyter GmbH
• Subjects: Cement; Compressive strength; Engineering; Flexural strength; Graphene; graphene oxide; Heat measurement; Mortars (material); Road repairing; Sulfoaluminate cement; sulphoaluminate cement; ultra-early strength
• ISSN: 2191-9097; 2191-9089; 2191-9097
• DOI: 10.1515/ntrev-2020-0002

In order to meet the increasing engineering requirements, the ultra-early strength of sulphoaluminate cement (SAC)-based materials need to be improved to achieve road repair, engineering rescue and other objectives. Graphene oxide (GO) of 0.04 wt% was incorporated into SAC mortar to prepare GO enhanced SAC mortar (GO-SAC). It was found that the compressive strength of GO-SAC was increased by 46.9% at the age of 6 hours, and the flexural strength of GO-SAC was increased by 121.4% at the age of 100 minutes, compared with the control SAC mortar. The mechanism analysis based on the characterization results derived from XRD, BET, in situ ATR-FTIR, hydration heat measurement, TG–DSC and SEM showed that, the addition of minute quantities of GO led to the formation and growth of ribbon-like AFt,which further resulted in the improvement of the ultra-early strength of GO-SAC. This work indicates that GO has great potential for practical application in the preparation of high-performance SAC-based materials with ultra-early strength.