Strengthening of Reinforced Concrete Structures with Carbon Reinforced Concrete—Possibilities and Challenges

Research output: Contribution to journalResearch articleContributedpeer-review



The strengthening of existing reinforced concrete structures (RC) with carbon reinforced concrete (CRC) has a high potential to save resources and to increase the lifespan of the whole strengthened structure immensely. However, when strengthening structures with CRC, in some cases, failure due to concrete cover separation is detected, leading to the fact that the potential of the carbon reinforcement cannot be exploited. The prediction and prevention of this type of failure is the subject of current research. In this paper, a strut-and-tie-model is presented for calculating a critical tensile force leading to failure due to concrete cover separation. Additionally, possible methods to avoid that kind of failure are suggested. One of these is doweling the ends of the strengthening layer. This paper presents the first experiments to test this method, which show that doweling the strengthening layer leads to much higher failure loads compared to a structure without doweling. However, further investigations have to be examined to verify these first results.


Original languageEnglish
Pages (from-to)400-426
Number of pages27
Issue number2
Publication statusPublished - 13 May 2022

External IDs

ORCID /0000-0002-1596-7164/work/142255669



  • bending tests, carbon reinforced concrete, carbon reinforcement, concrete cover separation, CRC, FRP, strengthening, textile reinforced concrete