Summary of Rubber Modified Asphalt Product Specifications around ...

313.10.01.02.02.06 Payment Factor for Combined Mix Properties and Compaction
Clause 313.10.01.02.02.06 of OPSS 313 is amended by the addition of the following:
For Superpave 12.5FC 1 R-Gap Graded, as long as the lot mean compaction is between 90.5 and 98.0 percent,
the payment factor for compaction, PFC, shall be equal to either:
a) PFM, if the PFM is less than 1.0; or,
b) 1.0, if the PFM is equal to or greater than 1.0.
Otherwise, if the lot mean compaction is outside the 90.5-98.0 percent range, the PFC shall be considered to be
0.65.
Table R1
Trial Section
Trial Section Pavement Course Location (Stations) Mix Type
Wet Process-Field Blend Surface 15+000 to 19+000
Hot Mix
Asphalt
Type
Superpave
12.5FC 1 R-
Gap Graded
Table R2
Superpave 12.5FC 1 R-Gap Graded Properties
Percentage Passing by Dry Mass of Aggregates
Sieve Size, mm
12.5 9.5 4.75 2.36 1.18 0.075
Traffic
Category
Base
PGAC
Grade
Superpave 12.5FC 1 R-
Gap Graded
% Air
Voids
%
VMA
min.
RACBID
(%)
90-100 78-92 28-42 15-25 5-15 2-7 C 58-28 4 18 6.5
Table R3
Gradation Requirements for Crumb Rubber
Process Sieve Percent Passing Sieve by Mass
Wet-Field Blend
2.36 mm 100
2.00 mm 100
1.18 mm 80 – 100
600 µm 40 – 60
300 µm 5 – 15
150 µm 0 – 10
Table R4
Requirements for Field Blend RAC (after reaction)
Test Parameter Test Method Specification Limit
Field Viscosity @ 191°C (375°F), California Laboratory Procedure 1500 – 4000
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