Optimization and multi-functional predictive performance of advanced superhydrophobic cementitious materials for water-resistant infrastructure
摘要
The development of water-resistant infrastructure faces critical challenges due to water ingress, which compromises durability and structural integrity levels. Traditional approaches to hydrophobic concrete often fail to address long-term performance under dynamic environmental conditions, with limitations in durability, scalability, and multi-functionality. To overcome these shortcomings, this study introduces advanced superhydrophobic cementitious materials integrating innovative methodologies that simultaneously enhance hydrophobicity, durability, and functionality. Functionalized nanoparticles with long-chain alkyl silanes offer dual benefits of superior hydrophobicity (contact angle > 150°) and enhanced mechanical strength (> 50 MPa), addressing the challenge of balancing water repellency with structural properties. Gradient porosity via 3D printing enables hierarchical hydrophobic textures, reducing capillary absorption by 95% and extending durability in wet-dry cycles. Stimuli-responsive surface modifications embed microcapsules with hydrophobic agents that ensure self-healing, achieving up to 80% recovery in water repellency post-damage. Machine learning optimizes mix formulations, reducing experimental iterations by 70% while ensuring predictive accuracy (> 95%) for targeted performance. Multi-functional composites incorporating piezoelectric nanoparticles harvest ~ 10 µW/cm2 energy while maintaining hydrophobicity, demonstrating potential for smart infrastructure applications. Freeze–thaw resistance is enhanced through cryo-protective agents, achieving > 300 cycles without degradation. The proposed methodologies validate their efficacy through a real-world application testing framework, ensuring scalability with minimal loss of water repellency (> 90%) and compressive strength retention (> 85%). This work not only offers groundbreaking solutions for water-resistant infrastructure but also paves the way for sustainable, resilient, and smart construction materials, extending the operational life of structures under diverse environmental conditions.