Professor Dr. Muhammad Shamil Muhammad, Assistant Lecturer Abdullah Hamid Radhi, researcher Milad Shallal Tarish, and researcher Dr. [Name Missing] published [the paper]. Mohammed Karim Zahir published a scientific paper titled “Improving the Mechanical Properties and Microstructure of Sustainable Self-Compacting Concrete Reinforced with Hybrid Fibers Containing Recycled Treated Aggregate” in the journal *Discover Materials*, indexed in Scopus in the first quartile (Q1) with an impact factor of 3.6, published by Springer Nature. The research addresses improving the mechanical and microstructure properties of recycled self-compacting concrete. Two treatment methods were used: the first involved treating the concrete structure using different types and proportions of fiber steel, while the second treated the structure of the recycled aggregate using cement grout. The results were positive, improving aggregate properties and contributing to the application of sustainable concrete in concrete structures.



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