SPECIMEN PAPER
ASPHALT
SPECIMEN PAPER
MOLD
Figure 4-1. Loading the Mold
Before each compaction cycle, clean the turntable and loading head
with a degreasing cleaner. If compacting at angles less than 0.7°,
remember to convert the unit (see page 3-18). For small angles
apply a light lubricant such as Slick 50 One Lube to the turntable
before each compaction cycle.
NOTE
Before placing the mold in the chamber, ensure that the
angle has been removed and that the loading head is
centered.
Wearing heat-resistant gloves and safety glasses, put the hot mold
loaded with hot mix asphalt in the specimen chamber.
Rotate the mold so that the notch on the mold handle is at 6 o'clock.
This aligns the mold notch with the ram pin. Close the chamber
door.
COMPACTING THE SPECIMEN
The Model 4140 Gyratory Compactor offers two compaction
modes: automatic compaction and manual compaction. With
automatic mode the user compacts the specimen with a single
keypress. With this mode the user can also automatically output
data. With the manual mode the user can guide the compactor
through each step of compaction with a single, specific keypress.
The automatic mode is helpful for general use. The manual mode
provides the user with greater flexibility (see page 4-7).
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