Cascadian Paving Grade Bitumen
Class 170, Class 320, Class 600
(Certified by SGS Testing & Control Services Singapore Pte Ltd)
Most high performing roads in Australia are built and maintained using bitumen because it is durable and has exceptional waterproofing and adhesive properties. Bitumen used in road construction and maintenance are refined and blended to meet strict road engineering requirements and industry specifications.
Paving grade bitumen’s are categorized according to viscosity (degree of fluidity) grading’s. The higher the grade, the stiffer the bitumen.
Bitumen Class 170
Class 170 is widely used in sprayed sealing and light asphalt applications to provide durability and fatigue resistance. It is also used to manufacture cutback bitumen’s, bitumen emulsions and modified bitumen’s.
Bitumen Class 320
Class 320 is most commonly used to manufacture asphalt mixes. Due to its higher viscosity, stiffer asphalt mixes can be produced to improve resistance to shoving and other problems associated with higher temperature and traffic loads.
Bitumen Class 600
Class 600 is primarily used to manufacture extra heavy-duty asphalt pavements that need to endure substantial traffic loadings.
Applications
The table below shows typical applications for paving grade bitumen’s:
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Applications |
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Bitumen Class |
Sprayed Sealing |
Asphalt |
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Medium |
Heavy |
Extra Heavy |
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Class 170 |
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|
|
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|
Class 320 |
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|
|
|
|
|
Class 600 |
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|
|
|
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Bitumen is recognized nationally for its proven track record in delivering products of consistently high quality. Every day out products perform under the most diverse and demanding road conditions in Australia. This is attributable to a combination of out unique product technology; comprehensive quality assurance programs; operational efficiency and sophisticated production processes- all supported by out highly skilled and experienced staff.
Our product quality management practices reflect out commitment to delivering the highest quality products that perform on the road.
Storage & Handling
The Storage of bitumen’s for prolonged periods at elevated temperatures should be elevated temperatures should be avoided as quality may be adversely affected. As a general rule, bitumen should be stored at the lowest temperature that enables practical use.
For normal operations, such as blending and transferring liquid bitumen, temperatures of 10ºC to 40ºC above the minimum pumping temperature are recommended.
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Storage & Handling Temperature Recommendations |
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|
Bitumen Class 170 |
Bitumen Class 320 |
Bitumen Class 600 |
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Storage up to 30 days |
135-145oC |
135-145oC |
135-145oC |
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Storage for up to 14 days |
155-165oC |
155-165oC |
155-165oC |
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Storage for up to 7 days |
170-180oC |
170-180oC |
170-180oC |
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Maximum temperature |
190oC |
190oC |
190oC |
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Minimum pumping temperature |
135oC |
145oC |
155oC |
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Application Temperature Recommendations |
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|
Bitumen Class 170 |
Bitumen Class 320 |
Bitumen Class 600 |
|
Asphalt mixing |
150-160oC |
155-165oC |
165-175oC |
|
Asphalt compaction |
135-150oC |
140-155oC |
150-165oC |
|
Sprayed sealing |
175-185oC |
180-190oC |
N/A |
Bitumen Class 170, Class 320 and Class 600 bitumen’s are manufactured to comply with the requirements of Australian Standard As2008 Residual bitumen’s for pavements.
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Property |
Typical Value |
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|
Bitumen Class 170 |
Bitumen Class 320 |
Bitumen Class 600 |
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Viscosity at 60oC, pa.s |
170 |
320 |
600 |
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Viscosity at 135oC Pa.s |
0.40 |
0.53 |
0.80 |
|
Viscosity at 60oC after RTFO, Pa.s |
300 |
640 |
1300 |
|
Penetration at 25oC, dmm |
70 |
46 |
27 |
|
Flashpoint, oC |
360 |
360 |
360 |
|
Viscosity of Residue at 60oC % of original |
180 |
200 |
215 |
|
Density at 15oC, kg/m3 |
1.04 |
1.04 |
1.04 |
