Standard Viscosity Grade Bitumen also known as AC Grade Viscosity Bitumen. With AC grading, asphalt binder is specify by properties it possesses before it undergoes HMA making process. Asphalt binder samples Viscosity of standard bitumen measured at 60ºC .
Viscosity is measured in poise (cm-g-s = dyne-second/cm2). The lower the number of poises, the lower the viscosity and thus the more easily a substance flows. Thus, AC-5 (viscosity is 500 ± 100 poise at 60°C (140° F)) is less viscous than AC-40 (viscosity is 4000 ± 800 poise at 60°C (140°F). Table 2 shows standard viscosity grades for the AC and AR grading systems from AASHTO M 226 and ASTM D 3381. Typical grades used for HMA paving in the U.S. are AC-10, AC-20, AC-30, AR-4000 and AR 8000.
The AC viscosity bitumen categorized in 6 different grades include:
AC bitumen is liquid so it packed in new steel drums. In addition this drums can be palletized and load in 20` Full Container Load (FCL). Also this grade of bitumen can load as bulk in vessel.