PHASE II REPORT - Caltrans

2.4 IDA Werke EUROSTAR Power control-visc manual.
2.5 Velp Scientific mixing stirrer manual.
3.0 TERMINOLOGY
3.1 Definitions:
3.1.1 Mixing Torque (Mix Index), N-cm: the torque value measured in the initial, relatively flat
portion of the torque-time plot, where mixing takes place without a significant increase in the
measured torque.
3.1.2 Mixing Time, minutes: the amount of time over which mixing takes place without
significant increase in the measured torque; or the amount of time corresponding to the initial,
relatively flat portion of the torque-time plot before the torque-time plot begins to increase.
3.1.3 Spread Time, minutes: the amount of time over which the torque increases from the
Mixing Torque value to a value of 12 N-cm.
3.1.4 Maximum Torque (Spread Index), N-cm: the maximum torque measured before the mix
breaks and becomes brittle.
3.1.5 Breaking Time, minutes: the total amount of time until the mixture breaks by observation.
3.1.6 Pre-Wet Water: The amount of water added to the dry aggregate and dry additive, when
applicable. This moistens the aggregate before adding the liquid additive and asphalt emulsion.
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