High-Early-Strength Concrete Optimized with Hybrid Waste-Derived Nanomaterials: RSM-Based Design and Microstructural Analysis
High-Early-Strength Concrete (HESC) is increasingly required in accelerated construction, yet most existing studies focus on single nano-additives rather than hybrid waste-derived systems. This study investigates the individual and combined effects of nanoclay (NC), nanosilica (NS), and cellulose nanofibers (NCel)—each...