Interface Durability of ECC Repairs on Concrete Structures Subjected to Dry-Wet Cycles

Balitebya Gloire Malirwa*, Hirwa Ibrahim

Abstract

The study investigated the durability and effectiveness of Engineered Cementitious Composite (ECC) repair interfaces when applied to damaged concrete structures and exposed to alternating dry and wet conditions. In the context of such fluctuating environmental conditions, the superior mechanical properties of ECC do not necessarily protect the repair-substrate interface from degradation. The study uses systematic experimental testing methods along with parametric analysis to investigate the performance factors of the interface, such as mix design and surface preparation, and curing techniques. Bond strength between interfaces depends heavily upon surface topography, together with pre-treatment methods and polymeric additives added to ECC materials. The microscopic examination shows that interface failures occur because moisture transport affects the interface, together with the different rates of shrinkage between the repair materials and the base materials. The study’s findings provide practical solutions to enhance ECC repair durability through improved surface prep techniques and modified mixtures, and effective curing methods. Such research findings are applicable in advancing the development process of durable concrete repair methods for structures exposed to changing environmental conditions.

Keywords

Engineered Cementitious Composites; concrete repair; interface durability; dry-wet cycles; bond strength.

Cite This Article

Malirwa, B. G., Ibrahim, H. (2025). Interface Durability of ECC Repairs on Concrete Structures Subjected to Dry-Wet Cycles. International Journal of Scientific Advances (IJSCIA), Volume 6| Issue 5: Sep – Oct 2025, Pages 932-939 URL: https://www.ijscia.com/wp-content/uploads/2025/10/Volume6-Issue5-Sep-Oct-No.954-932-939.pdf

Volume 6 | Issue 5: Sep – Oct 2025