PHASE II REPORT - Caltrans

5.11 Environmental chambers which can maintain specified curing temperatures and
humidity conditions.
5.12 Forced air draft ovens for curing long term evaluation specimens at 140°F +/- 3°F
(60°C +/- 3°C.).
6.0 MATERIALS
6.1 Aggregates: Sample representative portions of aggregates used for slurry seal mix
or micro-surfacing mix. Use material of the type, grade, and source proposed for the project.
Use the aggregates that pass the 3.8 inches (96.5 mm) sieve. Aggregates shall be dried at
140°F (60°C) to a constant mass and cooled to the prescribed test temperatures prior to
performing the test.
6.2 Asphalt emulsion shall be representative of the material to be used in the project.
6.3 Set control additives, both solid and liquid, shall be representative of the materials
to be used in the project.
6.4 Distilled potable water with a pH between 6.0 and 7.0 shall be used.
7.0 EVALUATION PARAMETERS
7.1 Curing duration of specimens: 30 minutes, 1 hour, and 3 hours.
7.2 Curing temperatures of specimens: 59°F (15°C), 77°F (25°C), and 95°F (35°C).
7.3 Curing humidity of specimens: 50% and 90%.
8.0 PREPARATION OF TEST SPECIMEN
8.1 Aggregate, asphalt emulsion, set control additives and mixing water shall be
maintained at 77°F (25°C).
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