Bitumen penetration grade 120/150 means the penetration value is in the range 120 to 150 at standard test, This penetration Grade bitumen are specified by the penetration and softening point test. The designation is by penetration range only. The penetration grade bitumen have a thermoplastic property which causes the material to soften at high temperatures and to harden at lower temperatures. This unique temperature/ viscosity relationship is important when determining the performance parameters such as the adhesion, rheology, durability and application temperatures of bitumen.

Bitumen Penetration Grade 120/150 is a Bitumen usually used as a Paving Grade Bitumen suitable for road construction and for the production of asphalt pavements with superior properties and it’s very important once it bounds the aggregates and creates a unique cohesion and stability to the bituminous mix. This grade of Bitumen is mainly used in the manufacture of hot mix asphalt for bases and wearing courses.

Bitumen 120/150 Specifications

No. Analysis Unit Limit Test Method
1 Density@25 ̊ C Kg/m³ 1000-1050 ASTM D70 or D3289
2 Penetration@25 ̊ C Mm/10 120-150 ASTM D5
3 Softening point ̊ C 37 Min. ASTM D36
4 Ductility@25 ̊ C Cm 100 Min. ASTM D113
5 Loss on heating Wt% 0.5 Max. ASTM D6
6 Drop in penetration after heating % 20 Max. ASTM D5 and D6
7 Flash point ̊ C 218 Min. ASTM D92
8 Solubility in Trichloroethylene Wt% 99.0 Min. ASTM D4
9 Spot test - Negative AASHOT102
10 Viscosity@60 ̊ C P 450+90 ASTM D2171
11 Viscosity@135 ̊ C CST 170 Min. ASTM D2170

 

Usage: The main common usage of bitumen 120/150 is being used for road and airport construction.

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