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The test is widely used all over the world for classifying bituminous materials into different grades.

Higher values of penetration indicate softer consistency. The penetration test is used as a measure of consistency.From Oil Refineries (this is the major source of bitumen in Pakistan).īitumen is usually characterized in the following three types of grades.Extracted from Limestone and Sandstone (procedure adopted in USA).8 PENETRATION TEST ON BITUMINOUS MATERIALS.Ĭonsistency of a bituminous material expressed as the distance in tenths of a millimeter that a standard needle vertically penetrates a sample of the material under known conditions of loading, time, and temperature.īitumen is generally obtained from the following three sources

Penetration Test of Bitumen EXPERIMENT NO.