NECEPT Asphalt
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Terms in this set (44)
Specific gravity of compacted specimen or pavement
Gmb
core, including air voids
Theoretical maximum specific gravity or "RICE"
specific gravity of Asphalt-coated aggregated or
"specific gravity of mix at zero air voids"
Gmm
Water batch temperature must be at 77 (plus or
minus)2 degrees
Mechanical Foaming Temperature can't be less than 260 degrees
Pub 351 Asphalt Tech Certification Program
PG-58S-28 215-310 Degrees (COLD)
PG-64S-22 220-320 Degrees (Non-Heavy)
PG-64E-22 240-330 Degrees (Heavy)
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Reduced with the proper BINDER grade and Asphalt
content.
May have been caused by allowing traffic on a map
that was too hot.
Need for a scratch course, leveling, or milling
Scratch Course: used to fill wheel ruts & other local
Rutting small depressions
Leveling Course: used to provide a relatively uniform
level platform for placing binder or wearing course.
Module 4 page 42
Calculations are NOT linear and cars DO NOT count.
ESAL
18,000 lbs
Mix Designs Do not place when surface is wet or temperature is 35
(Base Course, Degrees or below.
Existing roadway materials
Full Depth Reclamation
Stabilized additives
(FDR)
Imported aggregate or RAP
TR-447 Sampling
Sampling NO sampling needed for quantities less than 500
Extended paving season is from April 1 to November
15
Paving Seasons
Paving season is from April 1 to October 31
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Tested using PTM 715 and PTM 716
Density Cores
Cores are to be taken within 1 DAY (24hrs) of
placement
Offset joints by 6 inches
Joints
Overband all joints with Binder-(4+-1)
Minimum depth is 1 inch
9.5mm Wearing Course 6.3mm placement must be greater than 50 degrees
outside and surface
PG-64E-22- 240 to 330 Degrees
Prohibited when weather is ≤50 degrees or wet
surfaces
93%-98% for 100% payment
NO TACK between layers
Stone Matrix Asphalt -9.5 or -19mm mixes
>50 degrees
Allows infiltration
Do not over compact
Cool to 100 degrees between each layer
4 passes with static drum
TACK 90-150 Degrees
NTT/CNTT 140-180 Degrees
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