SAP-L High-performance Anti-rutting Agent (Second Generation) is developed by adding reactive polyurethane materials based on macromolecular polyolefin. It further improves high-temperature performance while reducing product dosage, greatly cutting costs and enhancing low-temperature crack resistance.
At present, according to national standards for the rut dynamic stability of asphalt mixtures, the value shall be no less than 800 times/mm for ordinary asphalt mixtures and no less than 3000 times/mm for modified asphalt mixtures. The rut dynamic stability of mixtures with SAP-L high-performance anti-rutting modifier can reach over 15000 times/mm, while ensuring the ultimate failure strain is no less than 2000 με.
Technical Requirements of SAP-L High-performance Anti-rutting Modifier
表格
| No. | Index | Unit | Technical Requirement | Test Method |
|---|
| 1 | Appearance | — | Black, uniform granules | JT/T 860.1 |
| 2 | Mass of Single Particle | g | ≤0.05 | JT/T 860.1 |
| 3 | Melt Index | g/10min | ≥2 | GB/T 3682.1 |
| 4 | Tensile Strength | MPa | ≥25 | GB/T 1040.1 |
| 5 | Ash Content | % | ≤2 | JTG E20/T 061 |
The construction technology of asphalt mixture with SAP-L high-performance anti-rutting modifier is basically consistent with the conventional process. During production, SAP-L high-performance anti-rutting modifier is added externally into the mixing drum in accordance with the conventional mix proportion of asphalt mixture. The typical dosage is 0.5% by mass of the asphalt mixture. Slightly extend the mixing time to achieve thorough and uniform blending, with no other special requirements. Paving and compaction shall be carried out on site following conventional procedures. Traffic can be opened once the pavement temperature drops below 50℃ (water spraying is available for cooling), and no curing is required.
