What are the potential long$-$term implications of using high$-$strength concrete in the construction of infrastructure projects, particularly bridges and high$-$rise buildings, in terms of structural performance, durability, and sustainability? Discuss the effects on material properties, construction methodologies, maintenance requirements, and environmental considerations, taking into account factors such as creep, shrinkage, carbonation, and potential for corrosion of reinforcement. Analyze the challenges and opportunities associated with the adoption of high$-$strength concrete in civil engineering practices, and propose strategies for optimizing its usage while ensuring safety, resilience, and sustainability of the built environment over its lifecycle.