The Effect of Different Parameters on the Mechanical Properties of Two- Stage Concrete under Triaxial Compression

Abstract This study conducts a comprehensive comparative analysis of the triaxial compressive strength and associated mechanical properties between Two-Stage Concrete (TSC) and Conventional Concrete (CC). Through rigorous using triaxial test methodologies, our research quantitatively delineates TSC's mechanical superiority, promoting its broader application in diverse construction settings. Key findings reveal that TSC, particularly types with finer aggregates, demonstrates superior shear strength, achieving up to 52.4 MPa under dry conditions compared to CC's 48.38 MPa. Furthermore, TSC exhibits remarkable stress tolerance, withstanding up to 82.04 MPa, significantly outperforming CC, which manages only 69.61 MPa under similar conditions. TSC also maintains higher modulus of elasticity and internal friction angles, indicating better deformation behavior and shear resistance. Additionally, TSC shows greater resilience to moisture, suggesting its potential for use in variable moisture environments. These properties highlight TSC’s robustness for high-load applications and its suitability for infrastructure prone to environmental fluctuations. By aligning with existing literature on the benefits of finer aggregate sizes in enhancing concrete's mechanical resistance, this research underscores the strategic advantage of integrating TSC in modern construction practices, emphasizing its enhanced strength, durability, and environmental adaptability.