Performance Grade HiMA Specifications
The table lists specification for the following types of HiMA PMA:
Climate-based HiMA grades:
PG76E-22 (recommended base binder (bitumen): PGXX-28 to meet viscosity requirement)
PG76E-28 (recommended base binder (bitumen): PGXX-28)
PG70E-34 (recommended base binder (bitumen): PGXX-34)
Special grade used to improve pavement resistance to studded tire damage:
PG64E-40 (follow this link to read a case study)
Property *** |
Aging |
Test method |
Unit |
Limits |
Comments |
*** Rotational viscosity at 135 °C |
Unaged |
AASHTO T 316
ASTM D4402 |
Pa×s |
≤3.0 |
Maybe be changed to ≤5Pa×s at the discretion of the specifying agency. |
Storage stability
(difference in softening point) |
Unaged |
ASTM D7173 |
°C |
≤ 5 |
Helps prevent material phase separation in storage |
MSCR %R at 3.2kPa at high temperature PG grade |
RTFO aged* |
AASHTO M 332/T 350
ASTM D7405 |
% |
≥90% |
Ensures highly flexible material |
MSCR Jnr at 3.2kPa at high temperature PG grade |
RTFO aged |
AASHTO M 332/T 350
ASTM D7405 |
1/kPa |
≤ 0.1 |
Provides resistance to permanent deformation |
G* x sin δ at climatic intermediate PG grade temperature |
PAV aged* |
AASHTO T 315
ASTM D7175 |
kPa |
≤5000 |
Select test temperature based on climatic PG grade, not the HiMA PG grade |
BBR Creep Stiffness at low temperature PG + 10 °C |
PAV aged |
AASHTO T 315
ASTM D6648 |
MPa |
≤300 |
|
BBR Creep Stiffness at low temperature PG + 10 °C |
PAV aged |
AASHTO T 315
ASTM D6648 |
MPa |
≥0.300 |
|
*** This requirement may be waved at the discrection of the specifying agency if the supplier warrants that the
asphalt binder can be adequetly pumped and mixed at tempratures
that meet all applicable safety standards.
Polymer content in bitumen** |
7.0-8.0 wt% |
Content necessary for generation of continuous polymer network in asphalt binder |
* RTFO and PAV aging performed according to AASHTO T 240 / ASTM D2872 and AASHTO R 28 / ASTM D6521 respectively
** The appropriate content should be ensured by the PMA supplier
