EVALUATION OF REINFORCED CONCRETE STRUCTURAL CONDITION IN EXISTING BUILDINGS USING NON-DESTRUCTIVE TESTING (NDT) AND DEVELOPMENT OF MAINTENANCE STRATEGIES BASED ON CONCRETE QUALITY CLASSIFICATION. infrastruktur [Internet]. 2025 Oct. 31 [cited 2026 Feb. 25];11(2):109-14. Available from: https://journal.univpancasila.ac.id/index.php/infrastruktur/article/view/9179