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Bitumen AH Grade
Gemini Products supplies Aryl Hydrocarbon Bitumen or AH Grades. AH grades are as below:
- AH-50
- AH-70
- AH-90
- AH-110
- AH-130
AH grades are mostly used in Dubai.
AH-50
| SPECIFICATION | UNIT | VALUE | TEST METHOD |
|---|---|---|---|
| Penetration | 1/10 Millimetres | 40-50 | ASTM D5 |
| Softening Point Degree Celsius (°C) | Degree Celsius (°C) | 48-56 | ASTM D36 |
| Density, 25°C | Kilogram per Cubic Meter (kg/m³) | 1.000/1.060 | ASTM D-36 |
| Ductility, 25°C | Centimetres per Second (cm/s) | 100min | ASTM D-113 |
| Loss On Heating | Weight Percentage (WT%) | 0.2max | ASTM D6 |
| Drop-in Penetration After Heating | Penetration After Heating | 20 max | ASTM D6/D5 |
| Flash Point (Cleveland Open Cup) | Degree Celsius (°C) | 250 min | ASTM D92 |
| Solubility in Trichloroethylene | Weight Percentage (WT%) | 99.5 min | ASTM D4 |
Bitumen AH Grade
It’s important for bitumen to be graded before it can be used in a construction project. This grade is primarily based on the stiffness of the bitumen at predetermined temperatures. Normally, these are 50, 60, and 130 degrees C, compared to the average temperature of bitumen (25 degrees C).
- Bitumen Performance Grade is a type of bitumen which is graded according to its performance at different alternating temperatures.
- On the other side, there is a possibility for thermal cracking at low temperature.
For both high and low temperature, PG grades are graded in 6 c rise. - The average seven-day maximum pavement temperature typically changes from 46 c to 82 c and the minimum pavement temperature changes from -46 c to -10 c.
For instance, bitumen PG 64-10 meets performance factor at an average seven-day maximum pavement temperature of 64 c also at a minimum pavement temperature of -10c.
