Morales Rapallo, ArianaArianaMorales RapalloKuchta, KerstinKerstinKuchta2025-12-042025-12-042025-11-26Recycling 10 (6): 214 (2025)https://hdl.handle.net/11420/59377This systematic review and meta-analysis per PRISMA 2020 addresses the use of recycled concrete aggregates as a replacement for aggregates in self-consolidating concrete for structural and non-structural use. It provides a comprehensive evaluation of the available research and offers a synthesised overview of the potential use of recycled concrete aggregate in self-consolidating concrete beyond standardised replacement levels. A total of 256 research papers were obtained from different databases, and after a detailed content review, only 24 unique experimental research studies fulfilled the review criteria. Data were extracted on recycled concrete aggregate source, pre-treatment, replacement ratio, mix proportions, fresh properties, strength, stiffness, and durability. It was observed across all studies that the recycled concrete aggregates originated from precast concrete rejected elements with a low water-to-cement ratio, producing an equal or stronger concrete than the reference concrete in the studies; however, none of the studies included in this research resulted in a higher modulus of elasticity than the corresponding reference concrete. Additionally, moderate aggregate replacement (20–50%) preserved the workability, whereas high replacements (75–100%) affected fresh concrete properties as well as increased shrinkage and creep. The inclusion of fine recycled concrete aggregate in addition to coarse recycled concrete aggregate has a larger effect on lowering compressive strength and stiffness in the concrete. Overall, high-quality coarse recycled concrete aggregate (precast rejects or screened demolition waste)—an aggregate replacement level of around 50%—facilitates the production of sustainable self-consolidating concrete, whereas full replacement requires aggregate pre-treatment and a carefully optimised mix design.en2313-432120256MDPIhttps://creativecommons.org/licenses/by/4.0/Recycled Concrete Aggregate (RCA)Coarse RCA (cRCA)Fine RCA (fRCA)Recycled Precast Concrete Aggregate (RPCA)Self-Consolidating Concrete (SCC)Technology::690: Building, ConstructionJournal Articlehttps://doi.org/10.15480/882.1627110.3390/recycling1006021410.15480/882.16271Journal Article