Shanghai Gengyun Industrial Co., Ltd
Asphalt is a complex black brown mixture composed of hydrocarbons with different molecular weights and their non-metallic derivatives. It has high viscosity and is usually in liquid or semi-solid form, with a black surface. Cold patch asphalt is soluble in solvents. Such as carbon disulfide and carbon tetrachloride. Asphalt is an organic cementitious material that is waterproof, moisture-proof, and corrosion-resistant.
Main technical requirements for cold patch asphalt |
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| Item | Unit | Requirements | ||
| Softening point | ℃ | ≥85 | ||
| Needle penetration | 1/10 mm | 25~55 | ||
| Flash point | ℃ | ≥260 | ||
| Sag (70 ℃, 5h) | mm | <60 | ||
| Cold bending test（ φ 20mm, -10 ℃) | — | 3/3 No cracking | ||
| Adhesion rate (0 ℃) | ≥95% | |||
| Thermal stability | Softening point increase | ℃ | ≤15 | |
| (200℃,24h) | Needle penetration ratio | ≥85% | ||
| Peeling force (200℃,24h) |
Polypropylene rope/Polypropylene rope | N/25 mm | ≥20 | |
| Polypropylene rope/steel wire | N | ≥20 | ||
| Hot droplet flow (75 ℃, 4h) | — | No drip marks | ||
| Frost crack point (-25 ℃, 4h) | — | 3/3 No cracking | ||
| Artificial seawater test: Peeling force ratio (polypropylene rope/steel wire) | ≥80% | |||
| Atmospheric exposure test: Peeling force ratio (polypropylene rope/steel wire) | ≥80% | |||
| Ocean hanging test: Peeling force ratio (polypropylene rope/steel wire) | ≥75% | |||