超高性能混凝土 (Ultra-high performance concrete, 简称UHPC) 作为一种新型水泥基复合材料, 主要由硅酸盐水泥、硅灰、石英砂、钢纤维及高效减水剂配制成, 通过极低水胶比、高胶凝材料用量和纤维增强实现超高力学性能与耐久性。目前, 对UHPC的研究主要集中在力学性能与耐久性, 但是, UHPC的原材料特点、制备加工以及工程应用与其自身的热学性能是密切相关的, 因此, 研究UHPC热学性能是非常必要的。在此背景下, 本文系统综述了UHPC的热学性能研究进展, 首先探讨了UHPC原材料特点、制备加工及UHPC的力学性能与耐久性; 其次, 围绕导热性、热容、热扩散性能、热膨胀性能及耐火性能等方面进行了总结分析; 最后, 讨论了有关UHPC热学性能目前的研究挑战以及未来的研究方向, 以期推动UHPC热学性能的深入研究, 并为混凝土的可持续发展提供指导。

Ultra-high performance concrete (UHPC) , as a novel cement-based composite material, is primarily composed of Portland cement, silica fume, quartz sand, steel fibers, and high-range water-reducing admixtures. This material achieves exceptional mechanical properties and durability through an ultra-low water- to-binder ratio, high cementitious material content, and fiber reinforcement. Current research on UHPC primarily focuses on its mechanical properties and durability. However, the characteristics of raw materials, preparation and processing, and engineering applications of UHPC are intrinsically linked to its thermal properties, making the investigation of UHPC' s thermal properties critically important. In this background, this paper systematically reviews the research progress on the thermal properties of UHPC. It first explores the characteristics of UHPC raw materials, preparation and processing, mechanical properties, and durability of UHPC. Secondly, a comprehensive analysis is conducted on its thermal conductivity, heat capacity, thermal diffusivity performance, thermal expansion performance, and fire resistance performance. Finally, the paper discusses current research challenges and future directions regarding the thermal properties of UHPC, aiming to promote in-depth studies in this field and provide guidance for the sustainable development of concrete.