This study describes advances in high-performance construction material development using a minimum of primary resources while enabling simultaneous CO2 sequestration capacities. Two so far unutilized Austrian steel slags were combined with metakaolin and vegetable oil to produce alkali-activated materials exhibiting high compressive and flexural strength of up to 94 MPa and 13 MPa, respectively. This approach enabled a reduction in primary mineral resources of up to 82 wt%, with an average reduction in global warming potential (GWP) of 52 % compared to a traditional high-performance Portland cement material. Oil addition led to the formation of mainly water unsolvable metal soap phases precipitating within the pore spaces without significantly altering the phase assemblage and chemistry of the binder matrix, but further reducing the GWP by 74 %. The (heavy metal) leaching behavior coincides with that of traditional concrete materials and was even further reduced by the addition of oil.

中文翻译：

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碱活性钢渣-油类复合材料：迈向资源效率和 CO2 中和


本研究描述了使用最少的初级资源同时实现 CO2 封存能力的高性能建筑材料开发的进展。迄今为止未使用的两种奥地利钢渣与偏高光土和植物油混合，生产出具有高达 94 MPa 和 13 MPa 的高抗压强度和抗弯强度的碱活化材料。与传统的高性能波特兰水泥材料相比，这种方法使原生矿产资源减少了高达 82 wt%，全球变暖潜能值 （GWP） 平均降低了 52%。加油导致在孔隙空间内沉淀出主要不可溶于水的金属皂相，而不会显着改变粘合剂基质的相组合和化学性质，但会进一步将 GWP 降低 74%。（重金属）浸出行为与传统混凝土材料一致，并且通过添加油进一步减少。