Sustainable self-compacting concrete: Effect of combined marble waste as fine and coarse aggregates

Introduction/purpose: Environmental protection through waste recycling is one of the major challenges of our time. Inert waste, mainly generated by industry, makes up a significant portion that harms the environment due to its accumulation in nature. Methods: The primary objective of this study is to examine the influence of marble waste valorization as sand and gravel on the rheological and mechanical properties of self-compacting concrete (SCC). For this study, marble was used as fine aggregate sand (MAS) at rates of 10%, 20%, and 30%, and as coarse aggregate gravel (MAG) at a rate of 100%. Results: The results of this study demonstrate that the introduction of marble waste (MW) as aggregate positively influenced the rheological characteristics, notably reducing the need for superplasticizer dosage. ACKNOWLEDGMENT: The authors gratefully acknowledge the Directorate-General of Scientific Research and Technological Development of Algeria (DGRSDT) for its valuable support. Conclusions: Additionally, in terms of mechanical outcomes, the use of MAG led to improved mechanical strengths.