Preliminary pre-damaged level assessment for concrete structures: A review

Deterioration due to arising in service loads or overloading is a key issue affecting the durability, safety, and sustainability of buildings and structures. Most of reinforced concrete (RC) structure is suffered from this type of damage. Therefore, it is important to offer repair methods of buildings vulnerable to the degrading effects of pre-damaged. But most of the researcher and practitioners underestimated the influence of pre-damaged level in design of repair structure. The first step of understanding this pre-damaged level is through determining the level of pre-damaged level undergone by visual assessment of concrete structures. However, there is a lack of integrated guiding principles in this field. Thus, this review paper identifies the visual assessments of determining the pre-damaged level of deterioration, with particular attention given to cracking issues. The paper also provides a categorization of pre-damaged level for plain cylinder and RC structures. This research contributes to the field by providing a readily available reference for practitioners and researchers on the current state of knowledge on pre-damaged level assessments.