A binder selected for defined pavement design temperatures. Its laboratory profile considers the original binder and simulated ageing; climate, traffic, reliability and the project standard guide selection. The two temperature values identify the specified high- and low-temperature grade, not the air temperature on the delivery day. Send the required PG designation and project test requirements so the proposed binder can be reviewed against the same specification.
Reference limits from the SRNT catalogue, not measured batch results or a COA. Availability, the applicable standard edition and contractual limits are confirmed for each enquiry.
| Property / condition | Unit | Reference limit | Test method |
|---|---|---|---|
| PAVEMENT DESIGN TEMPERATURES | |||
| Average 7-day maximum pavement temperature | °C | 58 | Grade designation |
| Minimum pavement design temperature | °C | -22 | Grade designation |
| ORIGINAL BINDER | |||
| Flash point (Cleveland open cup) | °C | ≥230 | AASHTO T48 |
| Rotational viscosity at 135°C | Pa·s | ≤3.00 | AASHTO T316 |
| DSR, G*/sinδ at 58°C, 10 rad/s | |||
| kPa |
| ≥1.00 |
| AASHTO T315 |
| AFTER RTFO AGING | |||
|---|---|---|---|
| Mass change (absolute value) | mass % | ≤1.00 | AASHTO T240 |
| DSR, G*/sinδ at 58°C, 10 rad/s | kPa | ≥2.20 | AASHTO T315 |
|---|
| AFTER PAV AGING OF RTFO RESIDUE | |||
|---|---|---|---|
| PAV conditioning temperature¹ | °C | 100 | AASHTO R28 |
| DSR, G*·sinδ at 22°C, 10 rad/s | kPa | ≤5000 | AASHTO T315 |
|---|
| BBR creep stiffness, S at -12°C, 60 s | MPa | ≤300 | AASHTO T313 |
|---|
| BBR m-value at -12°C, 60 s | - | ≥0.300 | AASHTO T313 |
|---|
| Physical hardening at -12°C, 24 h | - | Report | AASHTO T313 |
|---|
| Direct tension² at -12°C, 1 mm/min | % strain | ≥1.0 | AASHTO T314 |
|---|
¹ PAV conditioning follows the specified climatic protocol; 110°C may be required for desert climates.
² Where permitted by the contract specification, direct tension can replace the stiffness limit when S is 300-600 MPa; the m-value requirement still applies.
Reference PG profile. The contract standard and edition govern acceptance. M332 / MSCR traffic requirements and modification status are reviewed separately if requested.
DSR: dynamic shear rheometer. BBR: bending beam rheometer. RTFO: rolling thin-film oven. PAV: pressure aging vessel.
