Bitumen penetration grade 60/70 means the penetration value is in the range between 60 to 70 mm/10 at standard test conditions which commonly used as a paving grade.Its penetration grade ( the measure of bitumen hardness) is between 60 to 70.
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 60/70 is semi-hard penetration grade bitumen used as a paving grade bitumen which is suitable for road construction and repair.
Bitumen 60/70 is one of the most used bitumen grades and it’s a basic material for all other bituminous products.
Penetration determines the hardness of bitumen by measuring the depth to which a standard loaded the needle will vertically penetrate in 5 seconds, in a sample of bitumen maintained at a temperature of 25 degrees Celsius.
Quality of bitumen has many items to check but after passing the penetration and you make sure it is in order with very simple test you can recognize the quality is good or bad:
Bitumen in jumbo bag has several sizes:
An asphalt composition having high ductility at low temperatures is obtained by hot-mixing asphalt and 3 to 7 wt. % of sulfur, based on the weight of asphalt, at temperatures below 300° F. Small amounts of rubber further increase the ductility.We recommend to add extender oil and we sell it in various viscosity 10 and 20 also 30-40.
It is between 1600 to 2400.The viscosity of bitumen 60/70 penetration grade is the measure of its resistance to flow which affects resistance to deformation of the mixture. Wax content of bitumen effect in viscosity of bitumen directly and change the index too much so as much as less wax the flow and asphalt job is more easier.
Bitumen 60/70 is suitable for road construction and for the asphalt pavements with superior properties. This type of bitumen used in the manufacturing of hot mix asphalt for bases and wearing courses and the main usage of this product is used in the road in mild regions. The bitumen is provided during the presses of oxidation of vacuum bottom in bitumen production units. Due to its medium air blowing and penetration, it is used in mild areas.
jey pasargad’s bitumen 60/70 is fully qualified and guaranteed through the expertise of our international inspectors to ensure the quality meets the industry standards. jey pasargad’s bitumen is guaranteed to meet ASTM standard.
We guaranty the quality of bitumen 60/70 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.
|Bitumen 60/70||Test method||Unit||Specification|
|Specific gravity @ 25°C||ASTM D70||kg/cm³||1.01-1.06|
|Penetration @ 25°C||ASTM D5||mm/10||60-70|
|Softening point||ASTM D36||°C||49-56|
|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|
|Flashpoint||ASTM D92||°C||232 min|
|Solubility in Trichloroethylene||ASTM D2042||wt %||99 min|