Durability 5
Durability 5 :
The maintenance of performance properties of bitumen and bituminous materials to traffic, weather and other external factors. For bitumen, the measurement under standard specified test conditions of the long-term effect of heat and air is known as the 'durability' and is based on the accelerated aging of bitumen to determine the time required for it to reach a specified viscosity level that has been associated with distress in pavement surfacings
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