Abrasion resistance is a critical property for concrete structures subjected to abrasion deterioration, such as industry floors, pavement, or hydraulic structures. Studies on abrasion resistance of normal concrete have been well established, whereas there is limited research on the abrasion behavior of ultra-high performance concrete (UHPC). This study developed lower-cement UHPC incorporating basalt and calcined bauxite coarse aggregate, and a normal concrete was prepared for comparison. The abrasion resistance was evaluated based on the mass loss and abraded depth of concrete. A nanoindentation test was also conducted to investigate the underlying mechanisms that determine the macro-behavior. The UHPC with calcined bauxite aggregate showed 28% higher compressive strength than UHPC with basalt aggregate due to the rough surface texture and super high stiffness of the calcined bauxite. The evaluated UHPCs with coarse aggregate show good mechanical strength as well as excellent abrasion resistance than normal concrete that their abraded depth or mass loss was only approximately one-third of that of the normal concrete. The high strength and densified paste matrix of UHPC has a relatively bigger effect on the abrasion resistance of UHPC than the effect of coarse aggregate type, ITZ properties, or steel fiber which contribute more to the strength of UHPC.

耐磨性是遭受磨损劣化的混凝土结构的关键特性，例如工业地板、路面或水工结构。对普通混凝土耐磨性的研究已经很成熟，而对超高性能混凝土 (UHPC) 的磨损行为的研究却很有限。本研究开发了包含玄武岩和煅烧铝土矿粗骨料的低水泥 UHPC，并准备了普通混凝土进行比较。根据混凝土的质量损失和磨损深度来评估耐磨性。还进行了纳米压痕测试以研究决定宏观行为的潜在机制。由于煅烧铝土矿的粗糙表面纹理和超高刚度，采用煅烧铝土矿骨料的 UHPC 的抗压强度比采用玄武岩骨料的 UHPC 高 28%。与普通混凝土相比，经评估的粗骨料 UHPC 具有良好的机械强度和优异的耐磨性，其磨损深度或质量损失仅为普通混凝土的约三分之一。UHPC 的高强度和致密糊状基体对 UHPC 耐磨性的影响比粗骨料类型、ITZ 性能或钢纤维对 UHPC 强度的影响更大。与普通混凝土相比，经评估的粗骨料 UHPC 具有良好的机械强度和优异的耐磨性，其磨损深度或质量损失仅为普通混凝土的约三分之一。UHPC 的高强度和致密糊状基体对 UHPC 耐磨性的影响比粗骨料类型、ITZ 性能或钢纤维对 UHPC 强度的影响更大。与普通混凝土相比，经评估的粗骨料 UHPC 具有良好的机械强度和优异的耐磨性，其磨损深度或质量损失仅为普通混凝土的约三分之一。UHPC 的高强度和致密糊状基体对 UHPC 耐磨性的影响比粗骨料类型、ITZ 性能或钢纤维的影响更大，后者对 UHPC 的强度贡献更大。