Abstract

Graphene oxide (GO) is a novel nano-carbon material with excellent mechanical properties. It can be used in cement-based materials to induce cement hydration and enhance the strength and the toughness of cement-based material. However, during the practical application, due to high calcium ion concentration and the highly alkaline environment of the cement pore solution, GO has a serious agglomeration problem, which does not improve hydration and cement paste mechanical properties. Therefore, three typical structural models of GO are initially discussed in this article followed by a summary of the primary GO modification methods. Finally, prospects of GO modification strategies, classified based on local structures, are put forward for GO-cement composites.

摘要

氧化石墨烯（GO）是一种新型的纳米碳材料，具有优异的机械性能。用于水泥基材料中，诱导水泥水化，提高水泥基材料的强度和韧性。但在实际应用过程中，由于钙离子浓度高，水泥孔隙溶液的碱性环境强，GO存在严重的团聚问题，不能提高水化和水泥浆体的力学性能。因此，本文首先讨论了 GO 的三种典型结构模型，然后总结了主要的 GO 修改方法。最后，针对GO-水泥复合材料提出了基于局部结构分类的GO改性策略的前景。