This study examines the effects of accelerated carbonation on the mechanical properties, dry bulk density, porosity accessible to water, and the CO₂ sequestration capacity of a porous cement-based material that contains different replacement ratios of natural aggregate (NA) by recycled masonry aggregate (RMA). Two hardening environments were used: a conventional climate chamber as a reference (0.04 % CO₂) and a climatic chamber for accelerated carbonation (5% CO₂), with curing times of 1, 3, and 7 days. A volumetric substitution method where NA was replaced with RMA did not significantly affect its mechanical properties. Accelerated carbonation reduced the curing time, improved mechanical properties, increased dry bulk density, and decreased accessible porosity for water for all the mixes studied. The maximum CO₂ sequestration for cement-based materials made with mixed recycled aggregates was 27 kg CO₂/t of mix. Accelerated carbonation of fresh cement-based products containing RMA is a promising CO₂ capture and utilisation technology for precast non-reinforced concrete product manufacturing.

这项研究探讨了加速碳化对多孔水泥基材料的机械性能，干松密度，可接触水的孔隙率以及CO ₂固存能力的影响，该材料包含不同比例的天然石料（NA）被再生砖石骨料替代（RMA）。使用了两种硬化环境：作为参考的常规气候箱（0.04％CO ₂）和用于加速碳化的气候箱（5％CO ₂），固化时间分别为1、3和7天。用RMA替代NA的体积替代方法并未显着影响其机械性能。加速碳化可缩短固化时间，改善机械性能，增加干体积密度，并降低所有研究混合物的水可及孔隙率。由混合的再生骨料制成的水泥基材料的最大CO ₂固存量为27 kg CO ₂ / t混合物。包含RMA的新鲜水泥基产品的加速碳化是一种用于预制非钢筋混凝土产品制造的有前途的CO ₂捕集和利用技术。