4137.01 general requirements.
A. Meet the requirements for the type and grade
specified in the contract documents and comply with the Combined States Binder
B. Determine performance grade according to AASHTO R
Acid may be used as a co-modifier up to 0.4% by weight of binder. The Engineer
may verify with laboratory testing.
for Standard Traffic grades, meet CSBG requirements for Minimum Percent
Recovery when tested per AASHTO T 350 at the high temperature identified by the
stress sensitivity limits (Jnr Diff) for AASHTO M 332 when Jnr at 3.2 kPa is
below 0.5 kPa-1.
F. When PG 58-34E+ is specified, the binder shall
comply with requirements of PG 58-34E except that a minimum percent recovery of 90% when tested at 58°C per AASHTO T 350 at 3.2 kPa is