Exploring the application of advanced smart materials in the conservation of historic structures

The conservation of historic structures faces inherent challenges posed by aging materials, environmental degradation, and the imperative to preserve authenticity. Traditional conservation methods, while valuable, often involve invasive interventions and lack long-term adaptability. This review explores the paradigm-shifting potential of advanced smart materials in addressing these challenges. By categorizing smart materials based on their primary functions in conservation – namely structural reinforcement and repair, preventive surface protection, and structural health monitoring – this paper provides a comprehensive analysis of recent research advancements. We delve into specific applications, including microbially induced self-healing systems, shape-memory alloys for seismic retrofitting, photocatalytic coatings for pollution control, and fiber Bragg grating sensors for real-time monitoring. Furthermore, the paper critically examines persistent bottlenecks such as long-term compatibility, cost-effectiveness, and the integration of reversibility principles. Finally, future research directions are outlined, emphasizing the development of low-cost bio-based materials, multifunctional integrated systems, and the synergy between smart materials and artificial intelligence for predictive conservation. This review aims to serve as a consolidated reference and a forward-looking guide for researchers and practitioners seeking to leverage smart materials for the sustainable preservation of cultural heritage.