Repairing of Deteriorated Concrete using High Strength Concrete: A review

Abstract

The aim of this study is to review the published researches which discussed repairing and strengthening of the deteriorated normal strength concrete with overlay repaired materials. Throughout this literature, several subjects will be discussed such as the repairing of deteriorated concrete members, the main causes of this problem, compatibility between overlay material and concrete substrate, common repair materials, surface preparation of substrate etc. In addition, present review covers the test methods for evaluating the adhesion or bond strength of the hybrid concrete. There are many tests available in this direction but among these the slant shear test considers the widely recommended one to obtain failure modes at the interface as an adhesive failure and monolithic as cohesive failure. Flexural strength test considering three-point load system was considered as well in the review to examine bonding for the hybrid concrete. The experimental observations for many sorts of concrete material were discussed and conclusions were drawn to show the gap of knowledge in the field of strengthening of deteriorated concrete structures.