Civil Engineering - UPSC Civil Service Exam Questions - Discussion

M30 concrete is generally preferred in coastal construction because higher-grade concrete offers better durability, lower permeability, and improved resistance to chloride penetration, which helps protect reinforcing steel from corrosion in marine environments. Proper mix design and quality construction practices are equally important for long-term structural performance.

Why M30 should be the minimum grade of reinforced concrete in and around sea cost construction? Explain anyone.