TBT-4508G is designed & made as per national standard GB/T 4508-2010 Standard Test Method for Ductility of Bitumen, T0602-2011 Asphalt Ductility Test in JTG E20-2011 in the Industrial Standard of China JTJ052 Specification and Test Methods of Bitumen and
Bituminous Mixture for Highway Engineering and ASTM D113 Standard Test Method for Ductility of Bituminous Materials. It is used to determine the length at which the bitumen specimen is elongated before breaking at fixed speed and temperature.