Concrete combining ground recycled masonry aggregate (GR-RMA) as a partial cement replacement and coarse mixed recycled aggregate (MRA), both sourced from construction and demolition waste (CDW), was analysed for durability. The analysis consisted in indirectly characterising pore system permeability based on key water transport indicators. Concretes were prepared with 25%–50% MRA and/or 25% GR-RMA. The findings showed that, irrespective of the MRA content, in 28 d materials bearing 25% GR-RMA total water absorption was 5.7%–7.1%, porosity 3.5%–5.8%, depth of penetration of water under pressure 3.6%–4.6% and capillary water absorption 3.2%–4.9% lower than in concretes manufactured with conventional cement and MRA. Those values were directly attributable to the lower connectivity of the pore structure in the new concretes, which translated into higher electrical resistivity. All the concretes prepared with both 25% GR-RMA and 25%–50% MRA exhibited depth of water penetration under pressure of <30 cm, total water absorption of <4.2% and sorptivity of <0.4 mm min^−0.5, ensuring their impermeability to aggressive external agents. According to a multi-criterion analysis also conducted, optimal mechanical efficiency, durability and environmental impact were attained for materials bearing 25% GR-RMA and 25% MRA. The conclusion drawn from those findings is that the lower quality of MRA than conventional aggregate may be suitably offset by using supplementary cementitious materials (SCMs) in the respective cement in conjunction with such recycled mixed waste to obtain more eco-efficient concretes with properties that ensure their impermeability throughout their service life.

混凝土结合地面再生砖石骨料 (GR-RMA) 作为部分水泥替代品和粗混合再生骨料 (MRA)，均来自建筑和拆迁废料 (CDW)，对耐久性进行了分析。分析包括基于关键水传输指标间接表征孔隙系统渗透率。用 25%–50% MRA 和/或 25% GR-RMA 制备混凝土。研究结果表明，无论 MRA 含量如何，28 d 含 25% GR-RMA 材料的总吸水率为 5.7%~7.1%，孔隙度为 3.5%~5.8%，压力下水的渗透深度为 3.6%~4.6%毛细管吸水率比用传统水泥制造的混凝土低 3.2% –4.9 %和 MRA。这些值直接归因于新混凝土中孔隙结构的较低连通性，这转化为较高的电阻率。用 25% GR-RMA 和 25%–50% MRA 制备的所有混凝土在压力下均表现出 <30 cm 的水渗透深度，总吸水率 <4.2% 和 <0.4 mm min ^-0.5的吸水性，确保了它们的抗渗性对侵略性的外部代理人。根据还进行的多标准分析，具有 25% GR-RMA 和 25% MRA 的材料获得了最佳的机械效率、耐用性和环境影响。从这些发现得出的结论是，MRA 质量低于传统骨料的质量可以通过使用相应水泥中的补充胶凝材料 (SCM) 与此类回收的混合废料相结合，以获得更具生态效率的混凝土，其特性可确保其在整个使用寿命期间的不渗透性。