石墨烯改性超高性能混凝土综述

A Review of Graphene-Modified Ultra-High-Performance Concrete

石墨烯作为二维纳米碳材料, 既具有优异的力学性能, 又具有优异的电导率和热导率, 同时密度低、热稳定性和化学稳定性好, 将其与超高性能混凝土 (Ultra-high performance concrete, 简称UHPC) 复合, 有望发展兼具优异力学性能、耐久性能和多功能/智能性能的结构-功能一体化UHPC。本文系统梳理了石墨烯改性超高性能混凝土的研究进展, 首先探讨了不同种类石墨烯材料特性及其分散技术, 然后分析了石墨烯改性超高性能混凝土的早期理化性能 (如水化性能、流变性能、工作性能) 以及凝结硬化后的性能 (如静态/动态力学性能、耐久性及多功能/智能特性) , 最后总结讨论了石墨烯改性UHPC后续发展面临的挑战和发展策略。该综述有助于推动石墨烯改性UHPC的研究, 并为混凝土材料的可持续发展提供指导。

Graphene, as a two-dimensional nanocarbon material, exhibits excellent mechanical properties, along with outstanding electrical and thermal conductivity, low density, and superior chemical and thermal stability. Its incorporation into ultra-high performance concrete (UHPC) offers significant potential for developing structurally and functionally integrated UHPC with enhanced mechanical strength, durability, and multifunctional or smart capabilities. This review systematically summarizes recent advances in graphenemodified UHPC research. It begins with an overview of different types of graphene materials and their dispersion techniques, followed by a detailed analysis of their effects on the early-stage physicochemical properties of UHPC (e. g. , hydration behavior, rheological properties, and workability) and its hardened-state performance (e. g. , static and dynamic mechanical properties, durability, and multifunctional/smart functionalities) . Finally, the current challenges and strategic directions for further development of graphenemodified UHPC are critically discussed. This comprehensive review aims to accelerate research progress in graphene-modified UHPC and provide valuable insights for sustainable development of ultra-high-performance concrete materials.