Paving Grade BitumenBitumen 60 / 70

Bitumen 60/70 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 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.
penetration bitumen

Bitumen penetration grade 60/70 means the penetration value is in the range 60 to 70 at standard test conditions which commonly used as a Paving Grade.  This bitumen is produced through 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 60 to 70.

Bitumen 60/70 is one of the most used bitumen grades and it’s a basic material for all other bituminous products.

Intended use

Paving Grade Bitumen 60/70 is semi hard penetration grade bitumen can be used primarily for asphalt concrete and SMA in wearing courses for light and medium traffic, assuming the requirements for mix resistance to rutting are met.

Specification

REQUIRMENT
TEST METHOD UNIT MIN MAX
[email protected] 25°C ASTM D5 0.1 mm 60 70
SOFTENING POINT ASTM D36 °C 49 56
[email protected] 25°C ASTM D113 Cm 100
LOSS ON HEATING %WT ASTM D6 % (m/m) 0.2
FLASH POINT ASTM D92 °C 250
SOLUBILITY IN CS2 %WT ASTM D4 % (m/m) 99.0
DROP IN PENETRATION AFTER HEATING ASTM D5 % 20
DENSITY @25°C ASTM D70 / D3289 kg/m3 1.01 1.06

process temperatures

At laboratory
Sample compaction temperature (Marshall samples or samples compacted in gyratory press) 135–140°C
At mixing plant                                              
Bitumen pumping temperature >130°C
Temperature of bitumen for bituminous mixture production 155–165°C
At site
Minimum temperature of the supplied bituminous mixture (spreader’s hopper) 145°C
Minimum compaction temperature of bituminous mixture 120°C