High temperature induces concrete spalling particularly affects concretes wit dense structure, such as those used for carbon-reinforced concrete (CRC). However, a high fire resistance class is essential for the widespread practical application of CRC. In addition to the importance of the material properties of the components concrete and reinforcement, the test methods used to determine these properties are also of particular importance. Fire tests using the standard temperature-time curve according to DIN EN 1363-1:2012-10 are complex and therefore unsuitable for the initial characterization of new materials or minor modifications. A simplified PTM (pressure, temperature, mass) test setup to investigate high-temperature-induced spalling of high-performance concrete, used for carbon-reinforced concrete is presented here. The functionality of the test setup was tested using a High-Performance Concrete (HPC) specially developed for the production of carbon reinforced concrete structures. By adding short polypropylene (PP) fibers, concrete spalling was completely prevented, and the processability required for the production of CRC using the lamination process was maintained through minor modifications to the concrete composition.