Advances in Materials Science and Engineering, Год журнала: 2025, Номер 2025(1)
Опубликована: Янв. 1, 2025
The environmental impact of concrete production, mainly due to cement manufacturing, has prompted the search for sustainable alternatives, such as agricultural byproducts. Rice husk ash (RHA) and coffee (CHA) show promise supplementary cementitious materials that can enhance concrete’s strength durability. However, RHA’s fine particles reduce workability, CHA’s lower silica content limits its pozzolanic reactivity. While both have individual benefits, their combined effects on properties remain underexplored. This study investigates influence RHA CHA partial replacements fresh hardened concrete. A C‐25 mix was designed using ACI 211.1 method, with proportions ranging from 0% 25% 15%, respectively, in 5% increments. Workability assessed slump tests, mechanical properties—including compressive, split tensile, flexural strengths—as well durability (measured through water absorption, strength, weight loss under sulfuric acid exposure) were evaluated. results significantly affect reduced workability more than finer higher absorption. optimal 10% improved compressive by 5.04% 7.87% at 28 56 days, enhanced flextural tensile strengths 11.45% 7.41%, respectively. Durability tests showed combination 15% (R15C5) absorption resistance, indicating a denser microstructure greater resilience. SEM analysis shows adding enhances microstructure. R10C5 (10% CHA) strikes good balance refinement. R15C5 (15% improves durability, it similar dilution demand, confirmed statistical analysis. These findings demonstrate synergistic use optimize performance, providing alternative enhancing excessive or beyond compromise performance interference hydration workability.
Язык: Английский