PHASE II REPORT - Caltrans

8.6 Weigh 1300 g of aggregate into the mixing bowl. Typically, 1300 g of aggregate
should be enough aggregate to slightly over-fill the specimen mold during casting. Using a
spoon mix in prescribed amount of dry set additive to the aggregate and mix for 1 minute or until
uniformly distributed. Add the pre-wet amount of water and mix again for 1 minute or until
uniformly distributed. Add the liquid set additive(s) to the mix and mix for 1 minute or until
uniformly distributed. Finally, add the predetermined asphalt emulsion and mix for 1 minute or
until uniformly distributed. Immediately pour into the centered specimen casting mold.
8.7 Strike off the slurry mixture level with the top of the mold with a minimum of
manipulation. Use a sawing motion with the wooden dowel and even out the surface as seen in
Figure 8.3. Discard excess material. Remove the mold and cure under prescribed conditions of
duration, temperature, and humidity.
Figure B.5: Surface Preparation
8.8 After the prescribed curing conditions, record the weight of the specimen
immediately before placing into the abrasion pan. If there is excess water along the edges of
the specimen and surface of the casting plate, carefully remove by dabbing with an absorbent
paper towel before recording the initial weight.
9.0 TEST PROCEDURE
9.1 Place the cured specimen into the abrasion pan. Clamp the specimen plate to the
inside of the abrasion pan; tighten the quick clamps to press against the specimen plate that is
in the abrasion pan on the mounting plate.
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