Origin: Produced by blending refinery bitumen, a heavy oil residue from the refining of crude petroleum, with naturally occurring Trinidad Lake Asphalt.
Other Names: Trinidad Modified Asphalt (TMA), Trinidad Lake Asphalt Cement, Modified Asphalt, 17/23 Pen. Asphalt Cement.
Composition: Homogenous blend of 60-70% Trinidad Lake Asphalt and 30-40% Refinery Bitumen
Approximate Percentages of Components:
|
|
| Bitumen Content |
70 – 76% |
| Mineral Matter |
17 – 25% |
| Water of Hydration of Minerals |
2.6 – 3.0% |
| Other Organic matter |
1.9 – 2.2% |
2. Physical and Chemical Properties
- Appearance: A semi-solid, brown to black material
- Properties: Penetration (25 oC) 17 – 23
- Specific Gravity (25 oC) 1.16 – 1.25g/cm3
- Softening Point (R & B) 55 – 61oC
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