Viscosity Temperature Susceptibility (VTS) is a measure of the bitumen resistance for thermal cracks and the higher the VTS the higher the likelihood of thermal cracking.                                                              

Ductility test is a safety test to ensure that the operational safety during mixing and handling of the bitumen.                           

Alkali Silica Reaction is likely to be caused by:

What material from the table will allow for the lightest beam with a tubular circular cross section: