srjecsSRJECSSRJECS2788-9408https://doi.org/10.47310/srjecs.2025.v05i02.008Study of the Flexural Properties of Self-Compacting Concrete Containing Recycled Aggregates دراسة خواص الانحناء للخرسانة ذاتية الرص الحاوية على ركام معاد التدويرMohammedFadhil TawfeeqMahmoodYouns Mohammed AliCollege of Physical Education and Sports Sciences, University of Kirkuk, IraqRecycled concrete aggregate (RCA) in self-consolidating concrete (SCC) has the potential of reducing the environmental footprint and financial cost of this type of concrete- a benefit that is all the more relevant. The purpose of the project is to prepare SCC where the traditional coarse aggregate will gradually be substituted by recycled coarse aggregate in replacement rates of 00 per cent, 25 per cent, 50 per cent, 75 per cent and 100 per cent. SCC is very high workability: it flows and fills formwork self-underlying, without any mechanical vibration, which contributes to the elimination of numerous on-site placement difficulties. The homogeneous SCC mixture cannot be achieved easily; however, SCC is very sensitive to ambient conditions, constituent material and mix proportions. This paper was dedicated to the issues of producing such concrete, which were evaluated mainly through slump-flow test. A total of 15 mixes were prepared with different conditions, which included five levels of RCA replacement and three volume fractions of steel-fiber (0, 0.5 and 1.0). The research problem examined is the possibility of reusing the RCA of the construction debris and broken concrete. RCA is used in place of natural coarse aggregate at various levels to identify the best replacement ratio. Simultaneously, different volumes of steel fibers are added and their interaction with RCA is analyzed with the aim of enhancing the flexural behavior of SCC. The results of fresh-state tests indicate that workability is lower when the level of RCA content is higher; the introduction of steel fibers also lowers flowability and passing capability. To a degree, the substitution of natural coarse aggregate with RCA increased flexural. Besides, the flexural strength of SCC was enhanced by steel fiber incorporation.