The oxidation can be performed until a needed or desired characteristic of the bitumen for example, softening point, penetration distance, viscosity, another suitable parameter, or any combination thereof is achieved. After reading this specification, skilled artisans will be able to determine the particular conditions used for the oxidation. For the purposes of this specification, an oxidised asphalt material includes a partially oxidized bitumen source, such as partially oxidized petroleum-based bitumen asphalt.
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