Bitumen Grades Explained

Bitumen Grades Explained. Performance Bitumen Grades Performance Grade Bitumen is the Latest Standard of bitumen It is new method bitumen standard which based on varying temperatures PG 52 – 10 PG 52 – 16 PG 52 – 22 PG 58 – 10 PG 58 – 16 PG 58 – 22.

In the 1920s chemist Dr Karl Clark of the Alberta Research Council developed the hotwater process a method of extracting bitumen from oil sand Clark’s method is still used today Oil sand as mined commercially contains an average of 1012 per cent bitumen 8385 per cent mineral matter and 46 per cent water.

When to Use What Grade of Asphalt and Why

The ASTM standard D 946 gives 5 penetration grades for the bitumen binders They are Hardest Bitumen Grade 40 –50 60 –70 85100 120150 Softest Bitumen Grade 200300 The penetration grading system is 100 years old bitumen grading method In India before 2006 the most widely used grade of bitumen was 60 to 70.

Penetration Grade Bitumen, Penetration test of bitumen

Bitumen is classified by the depth to which a standard needle will penetrate under specified test conditions This “pen” test classification is used to indicate the hardness of bitumen lower penetration values indicating a harder bitumen higher values eg 160/220 indicate a softer grade.

Viscosity Grades – JJ Bitumen

Bitumen Grades ExplainedThese grades have been designated preferred grades in the uk national annexto en12591 As a sweeping generalisation the harder grades (70pen or less) are used as ‘asphalts’ while the softer grades (100 pen or more are used as binders for bitumen macadams (bitmac).