Abstract
Carbon textiles are used more and more as reinforcement in concrete structures. Due to their high durability the concrete covers can be extremely thin compared to traditional steel reinforced concrete, resulting in the possibility to build very thin elements with excellent performance. To improve the properties of the carbon textiles, the rovings are normally impregnated with different types of polymers. Additionally to the use as reinforcement, carbon textiles can also be used as anodes for cathodic protection. However, while first tests have shown, that impregnated carbon rovings are suitable to be used as CP-anodes, it is still not clear under which conditions the new types of anodes are stable or when they start to dissolve. This paper describes investigations on the influence of an anodic polarisation on the tensile strength of different types of impregnated carbon rovings.
Highlights
Carbon textiles are used more and more as reinforcement in concrete structures
This paper describes investigations on the influence of an anodic polarisation on the tensile strength of different types of impregnated carbon rovings
Durability and electrochemical stability of carbon fibers have been thoroughly proven, which justifies its increasing use as a structural strengthening material. [3,4] In order to investigate the suitability of carbon rovings with different impregnation materials for cathodic protection, a possible reduction in tensile strength under anodic polarization is of interest
Summary
Carbon textiles are used more and more as reinforcement in concrete structures. Due to their high durability the concrete covers can be extremely thin compared to traditional steel reinforced concrete, resulting in the possibility to build very thin elements with excellent performance. This paper describes investigations on the influence of an anodic polarisation on the tensile strength of different types of impregnated carbon rovings. [3,4] In order to investigate the suitability of carbon rovings with different impregnation materials for cathodic protection, a possible reduction in tensile strength under anodic polarization is of interest. Examinations related to the mechanical properties of carbon fiber fabrics under temperature stress were carried out by Younes et al and Raupach et al [6,7]. Both studies implemented stationary tensile tests with impregnated carbon fiber fabrics. Epoxy resin impregnated carbon [7] as well as styrene-butadiene rubber impregnated carbon [6] an extreme decrease of the tensile strength is observed after heating up to 200 °C due to dissolution of the impregnation material
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