Spalling of concrete cover induced by reinforcement

This paper investigates the phenomenon of cover spalling in reinforced concrete induced by bond or action an inner pressure. research is based on experimental programme comprising a series tests and with inner-pressure cylindrical openings. The test (aimed at representing conditions occurring for instance due to corrosion reinforcement) was performed hydraulic inflator devices embedded within openings near free surface. By means detailed surface measurements Digital Image Correlation, mechanisms triggering failures associated resistance are discussed analysed thoroughly. addition number phenomena relevant failures, such as influence casting position, group size effects. observed response, mechanical analogy, later used investigate structural pull-out specimens. analysis highlights analogies differences between two types (subjected imposed pressure stresses). On that basis, comprehensive approach treatment bond-related cases failing proposed, showing consistent agreement evidence.