Protection and repair of existing buildings is increasingly becoming crucial. In addition to weather protection and durability, building reinforcement is in the focus of new developments. Systems with fibre reinforced shotcrete, for example, are available for this purpose. This composite system protects the existing building substance in the long term and can also increase the load bearing capacity of the structure.
For the testing of fibre reinforced concretes, there are already various test methods that aim to determine the residual load bearing capacity after exceeding the maximum strength. These tests are sophisticated as they are deformation controlled and go beyond Fmax.
For the testing of structural coatings there is a quite new test procedure according to EN 14891.
In this test method, a slim prism 40 x 12(15) x 160 mm is manufactured, if possible, from the carrier material which contains a predetermined breaking point in the middle. The coating is then applied on one side according to the manufacturer’s instructions and stored if necessary. The prism is then broken in a special device on the uncoated side at the predetermined breaking point, which produces a very accurate defined tensile test specimen and allows the coatings to be reproducibly tested for adhesion, elasticity and tensile strength.