Eksperimentell undersøkelse av rissavstand
Abstract
Cracks in concrete structures have an effect on both the durability and the visuals of the structure. Therefore, it is important to control the cracks in reinforced concrete structures. This thesis address the difference in concrete cover thickness and how it affects the crack spacing and width. The concrete cover thickness is an important parameter when calculating the crack spacing and width of a reinforced concrete structure. From the Eurocode 2 and the Model Code 2010 the concrete cover is very deciding when calculating the crack spacing and width. This thesis compares the results from an experiment consisting of three different cover thicknesses against the results using the calculations from the current standards. Earlier studies suggests that the formulations in the current standards regarding the crack spacing and the crack width are questionable. The experiment for this thesis contained of testing six reinforced concrete specimens by applying axial tensile load. Cracks in concrete structures have an effect on both the durability and the visuals of the structure. Therefore, it is important to control the cracks in reinforced concrete structures. This thesis address the difference in concrete cover thickness and how it affects the crack spacing and width. The concrete cover thickness is an important parameter when calculating the crack spacing and width of a reinforced concrete structure. From the Eurocode 2 and the Model Code 2010 the concrete cover is very deciding when calculating the crack spacing and width. This thesis compares the results from an experiment consisting of three different cover thicknesses against the results using the calculations from the current standards. Earlier studies suggests that the formulations in the current standards regarding the crack spacing and the crack width are questionable. The experiment for this thesis contained of testing six reinforced concrete specimens by applying axial tensile load.