CEN/TC 254/SC 1/WG 2 - Thermal characteristics

This European Standard describes the test for form stability of metal faced and/or metal cored bitumen sheets fully bonded to a substrate. Other types of bitumen sheets can also be tested in accordance with this standard where appropriate.

This European Standard specifies the determination of the dimensional stability of bitumen sheets with flexible plastic-based reinforcement. Sheets reinforced with different bases or those without reinforcement may also be tested using the standard. It is not applicable to bitumen sheets with metal internal foils or those with metal facings.

This European standard specifies the determination of flexibility of reinforced bitumen sheets at low temperatures. Sheets without reinforcement can also be tested using this standard. The test is carried out on the upper and lower faces of the sheet either at a predetermined temperature or successively at different temperature steps for determining the cold bending temperature which represents a limit temperature.

This European Standard describes a test for bitumen sheets with reinforcement to determine the flow properties of the coatings relative to the reinforcement at elevated temperature. The test is carried out on both the upper face and lower face of the sheet either at a specified temperature or consecutively at different temperatures in order to determine the heat resistance.