Description of bitumen 40/50

The term “40/50” in bitumen 40/50 means the penetration value is in the range between 40 to 50 mm/10 at standard test conditions which commonly used as a paving grade bitumen. This bitumen is produced by aeration on vacuum bottom (the raw material used for making bitumen left in vacuum distillation column in oil refineries) in bitumen production units. Its penetration grade ( the measure of bitumen hardness) is between 40 to 50. Bitumen is specified by the penetration and softening point test. Designing is by penetration range only. The penetration grade bitumen has 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.

The Bitumen mode is dependent on temperature. The temperature-vs-stiffness relationship of bitumen is dependent on the type of crude oil and its refining method. Bitumen penetration grade 40/50 is semi-hard penetration grade bitumen used as a paving grade bitumen which is suitable for road construction and repair. It is also used for the production of asphalt pavements with the below technical specification. This grade of bitumen is mainly used in the manufacturing of hot mix asphalt for bases and wearing courses. Bitumen 40/50 is one of the most used bitumen grades and it’s a basic material for all other bituminous products.

Uses of bitumen 40/50
Bitumen 40/50 is suitable for road construction and for the asphalt pavements with superior properties. This type of bitumen used in the manufacture of hot mix asphalt for bases and wearing courses and the main usage of this product is used in the road at tropical regions. the bitumen is provided during the presses of oxidation of vacuum bottom in bitumen production units. Due to its high air blowing and penetration, it is used in tropical areas with the Warm weather. It is not softened at high temperature and does not fail its qualities.
Properties of bitumen 40/50

Bitumen Malaysia’s bitumen 40/50 is fully qualified and guaranteed through the expertise of our international inspectors to ensure the quality meets the industry standards. Bitumen Malaysia’s bitumen is guaranteed to meet the international standard of ASTM.

Technical specification of our bitumen 40/50
Bitumen 40/50Test methodUnitSpecification
Specific gravity @ 25°CASTM D70kg/cm³1.01-1.06
Penetration @ 25°CASTM D5mm/1040-50
Softening pointASTM D36°C52-60
Ductility @25°CASTM D113cm100 min
Loss on heatingASTM D6wt %0.2 max
Drop in penetration after heating ASTM D5-D6%20 max
Flash pointASTM D92°C250 min
Solubility in CS2ASTM D4wt %99.5 min
Spot testAASHOT102 –Negative