PHASE II REPORT - Caltrans

6.0 CHAPTER 6 SLURRY SURFACING SYSTEM (3S)
STRAWMAN SPECIFICATION
6.1 DESCRIPTION
This work consists of furnishing and placing a slurry surfacing system meeting the requirements
of this specification. The mixture shall consist of a combination of an emulsified asphalt, mineral
aggregate, mineral filler, water, and other necessary additives, mixed and placed on the
pavement surface in accordance with the dimensions shown on the plans.
Any modified ingredient shall be milled or blended into the asphalt or blended into the emulsifier
solution prior to the emulsification process. The emulsion supplier shall provide a certificate that
the emulsion supplied to the project conforms to the requirements of Table 1.
6.1.1 ASPHALT EMULSION
The asphalt emulsion used shall conform to the requirements of Table 1. Any modified
ingredient shall be milled or blended into the asphalt or blended into the emulsifier solution prior
to emulsification process. The emulsion supplier shall provide a certificate that the emulsion
supplied to the project conforms to the requirements of Table 6.1.
Table 6.1: Asphalt Emulsion Requirements
PROPERTY Test Method Minimum Maximum
Viscosity, Saybolt Furol @ 77°F (25°C),
Seconds
AASHTO T 59 20 100
Storage Stability test, one day, % AASHTO T 59 - 1
Particle Charge test AASHTO T 59 Positive
Sieve Test, % AASHTO T 59 - 0.1
Tests on Distillation
Oil distillate, by volume or emulsion, % residue AASHTO T 59 60 -
Tests on Residue
Penetration, 77°F (25°C), 100g, 5 sec AASHTO T 49 55 90
Ductility, 77°F (25°C), 50 mm/min AASHTO T 51 70 -
Solubility in trichlorethylene, % AASHTO T 44 97.5
Softening Point, minimum AASHTO T 53 135°F (57.2°C)
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