A Review of Thermal Properties of Ultra-High Performance Concrete

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.