Clinkerless ultra-high strength concrete formulated using alkali-activated binders (AAB-UHSC) emerges as a green high-performance construction material, but its durability characteristics have not been systematically investigated yet. In this work, the resistances of AAB-UHSC against water absorption, carbonation, chloride diffusion, and chloride-induced electrochemical corrosion of steel, are quantitatively evaluated and compared with those of ordinary Portland cement (OPC)-based UHSC and normal-strength AAB (AAB-NSC) counterparts. The results show that in comparison with OPC-UHSC of similar strength of ∼150 MPa, AAB-UHSC has lower water-permeable porosity and demonstrates superior performance against water absorption and chloride ingress, but a weaker carbonation resistance. However, despite lower CO₂ uptake capacity, the carbonation resistance of AAB-UHSC is about six times stronger than that of AAB-NSC, owing to its highly densified microstructure. Under the same chloride level and relative humidity conditions, the corrosion rate of steel embedded in AAB-UHSC is higher than that in OPC-UHSC, likely due to its higher moisture content and [Cl⁻]/[OH⁻] ratio that expedite steel dissolution. Moreover, the incorporation of steel fibers has limited influence on the transport-related durability performance of AAB-UHSC, implying a densified interfacial zone between steel fibers and AAB-UHSC matrices.

使用碱活化粘合剂（AAB-UHSC）配制的无熟料超高强混凝土作为一种绿色高性能建筑材料出现，但其耐久性特性尚未得到系统研究。在这项工作中，定量评估了 AAB-UHSC 对钢的吸水、碳化、氯化物扩散和氯化物诱发的钢电化学腐蚀的抵抗力，并与普通波特兰水泥 (OPC) 基 UHSC 和正常强度 AAB(AAB-NSC) 同行。结果表明，AAB-UHSC 与 150 MPa 的类似强度的 OPC-UHSC 相比，具有较低的透水孔隙率，并表现出优异的吸水和氯化物侵入性能，但较弱的抗碳化。然而，尽管 CO ₂吸收能力较低，但由于其高度致密的微观结构，AAB-UHSC 的抗碳化能力大约是 AAB-NSC 的六倍。在相同的氯化物水平和相对湿度条件下，嵌入 AAB-UHSC 的钢的腐蚀速率高于 OPC-UHSC，这可能是由于其较高的水分含量和 [Cl ^- ]/[OH ^- ] 比加快了钢溶解。此外，钢纤维的掺入对 AAB-UHSC 与运输相关的耐久性性能的影响有限，这意味着钢纤维和 AAB-UHSC 基质之间的界面区域致密化。