The present study details about the application of Steel Slag Aggregate (SSA) in pervious concrete and the SSA enhancement effect. Given the limitation of natural aggregates, the low utilization of SSA, and substantial urban environmental problems, SSA pervious concrete is considered an eco-friendly material for use in various civil and construction projects because of the beneficial effects of active hydration ingredients. However, there is limited research on the behavior of this clean material and its practical utilization. Therefore, different mix proportions based on SSA content were designed, and macroscopic properties were evaluated via laboratory tests. Based on Digital Image Processing (DIP), mesoscale finite element (FE) models containing zero-thickness Cohesive Zone Model (CZM)elements were used to study strengthening mechanisms and simulate cracking behavior. Compressive and splitting tensile strengths of 100% SSA pervious concrete increased by 35% and 50%, respectively, whereas the cost reduced by 18%. Interface transition zone (ITZ) enhancement is demonstrated as the main reason for performance improvement. The results of double-parametric inversion analysis indicated that cohesive strength and fracture energy of the ITZ increased by 52% and 35%, respectively. In particular, the increment in compressive strength was approximately proportional to slag aggregate content in addition to the increase in the shear cohesive strength of the ITZ; further, the increment in the splitting tensile strength was consistent with the increase in the tensile cohesive strength of the ITZ.

本研究详细介绍了钢渣骨料（SSA）在透水混凝土中的应用以及SSA的增强效果。考虑到天然骨料的局限性，SSA的利用率低以及严重的城市环境问题，SSA透水混凝土由于活性水合成分的有益作用，被认为是用于各种民用和建筑项目的环保材料。然而，关于这种清洁材料的行为及其实际利用的研究还很有限。因此，设计了基于SSA含量的不同混合比例，并通过实验室测试评估了宏观性能。基于数字图像处理（DIP），包含零厚度内聚区模型（CZM）元素的中尺度有限元（FE）模型用于研究强化机理和模拟开裂行为。100％SSA透水混凝土的抗压强度和劈裂抗拉强度分别提高了35％和50％，而成本降低了18％。界面过渡区（ITZ）增强被证明是性能提高的主要原因。双参数反演分析的结果表明，ITZ的内聚强度和断裂能分别增加了52％和35％。特别是，除了ITZ的剪切粘结强度的增加外，抗压强度的增加还与炉渣骨料含量成正比。进一步，