Lions stretched before they break down a lot "flexible" called and those who break before pulling in significant quantities "fragile" are called. BBR test unfortunately can not stretch some Qyrha to indicate failure. Final push-pull tension test directly for a bitumen at lower temperatures (between zero to minus 36 ° C) measures. A sample weights (dumb-bell specimen) in stress loaded with a fixed rate and a failure strain and change the length divided by the original length is detected. In this test, failure is defined by tension loading the sample reaches its maximum value. The fracture stress, strain at break must be at least 1 percent.
