Artificial steel slag aggregates were prepared via carbonating the mixes of steel slag, fly ash and Portland cement, of which the microstructure, property and their impact on the performance of concrete were investigated. Calcium carbonates were the main binders in the aggregates, of which the formation yielded dense microstructures and reduced crushing values. The carbonated artificial steel slag aggregates showed very stable volumes after the autoclaving test at 216 °C. This is due to the depletion of free-CaO contained in the steel slag as a result of carbonation. Concretes with compressive strengths of up to 45.5 MPa at 28d and stable volumes were prepared with the carbonated artificial steel slag aggregates. Owing to the water absorption in the artificial aggregates, higher relative humidity and in turn less autogenous shrinkages were induced in the concrete. This work provides a novel way to utilize steel slag to produce aggregates coupled with CO₂ sequestration.

通过将钢渣，粉煤灰和硅酸盐水泥的混合物碳化，制备了人工钢渣骨料，并研究了其微观结构，性能及其对混凝土性能的影响。碳酸钙是骨料中的主要粘合剂，其形成产生致密的微观结构并降低了压碎值。经过216°C的高压灭菌试验后，碳化的人造钢渣集料显示出非常稳定的体积。这是由于碳化导致钢渣中所含的游离CaO减少。用碳酸化的人造钢渣骨料制备了在28天时抗压强度高达45.5 MPa且体积稳定的混凝土。由于人造骨料中的水分吸收，较高的相对湿度，从而减少了混凝土的自生收缩。这项工作提供了一种利用钢渣生产与CO结合的骨料的新颖方法₂隔离。