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Unlike some substances (eg water which changes from a solid to a liquid at 0 degrees), bituminous materials do not have a definite melting point. Instead, as the temperature rises, these materials slowly change from brittle or very thick and slow-flowing materials to softer and less viscous liquids.

The softening point of bitumen lies within the range of 30 to 157 degrees.

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∙ 14y ago

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