This item is a mix design specification
utilizing a gyratory compactor to produce an asphalt concrete that is used for
an intermediate or surface course. Known
as Superpave, this asphalt concrete is used for
higher traffic routes and can be either a 446
or 448
asphalt concrete pavement. Superpave mix design
requires the use of special equipment, material properties, and design
procedures. Superpave
asphalt concrete requires inspection and documentation as per the requirements
of 401
and 446
or 448.
Superpave items are accepted per 448
or 446
requirements. See those items for
details.
1. Obtain the approved JMF for
the project.
2. Determine and document if paver is on approved list.
3. Document pavement surface condition, preparation, and
surface and air temperatures.
4. Document tack or prime used, along with source and
quantity used, versus required.
5. Check and document roller capacities as outlined in 401.13,
if required by the specification item.
6. Document lift thickness, mat width, weather
conditions, surface tolerance checks, equipment problems, mat problems
(segregation, tearing, tenderness, etc.), spreading rate, roller coverage, and
any other issues or observations made during paving operations.
7. Observe and document trucks hauling material.
a. Check for secured waterproof cover.
b. Check for insulated truck beds for temperatures below
50 °F (10 °C) and/or if the haul exceeds 20 miles (32 km).
c. Observe the asphalt mix in the truck and note any
slumping, drain down, or blue smoke.
8. Determine compliance with compaction requirements as
per 401.16.
9. Record asphalt mixture temperatures in the paver
hopper and on the mat at the time of compaction.
10. Determine and record required and actual placement
rates and variance.
11. Write location (station), date, and time on asphalt
plant tickets. Tickets should be totaled
daily and initialed with the calculator tape attached.
12. Take samples, cores, or density readings as required
by items 446
or 448.
13. Record luminance readings for night paving operations.
14. Determine plan quantity for payment.
15. Document on CA-FP-2
through 4 or other approved forms as needed.