Grade 40/50

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.

Softening point and penetration

Penetration grade bitumen supplied by jey pasargad is pure petroleum grade bitumen, manufactured from vacuum bottom by passing hot air. The bitumen supplied by jey pasargad is produced from remain of crude oil after cracking and removing hydrocarbon. Penetration grade bitumen 40/50 has penetration between 40~50 desi-millimeter and softening point between 52 ~ 60C. The penetration grade has a thermoplastic property which is like as synthetic resin material which gets softer with heating and hardens when cooled. This grade has very strong viscosity compare to other grades.

Application of bitumen penetration grade 40/50

Guaranty/warranty

jey pasargad guaranty the quality of bitumen 40/50 with arrangement of international inspector to check quality and quantity of the bitumen during the loading to vessel and controlling the production by QC by batch test report before shipping. jey pasargad guaranty the quality to meet with ASTM/EN 12591.

pecification and analysis

Bitumen 40/50	Test method	Unit	Specification
Specific gravity @ 25°C	ASTM D70	kg/cm³	1.01-1.06
Penetration @ 25°C	ASTM D5	mm/10	40-50
Softening point	ASTM D36	°C	52-60
Ductility @25°C	ASTM D113	cm	100 min
Loss on heating	ASTM D6	wt %	0.2 max
Drop in penetration after heating	ASTM D5-D6	%	20 max
Flash point	ASTM D92	°C	250 min
Solubility in CS2	ASTM D4	wt %	99.5 min
Spot test	AASHOT102	–	Negative