unless the project includes both 75 Blow and 50 Blow
mixes.
Select the appropriate gradation and VMA
requirements in Table 4 to be consistent with the
gradation chosen in Table 2. Delete the other two
lines in Table 4.
Remove item t., below if RAP is not used in the job.
**************************************************************************
The job mix formula shall be submitted in writing by the Contractor for
approval at least 14 days prior to the start of the test section and shall
include as a minimum:
a.
Percent passing each sieve size.
b.
Percent of asphalt cement.
c.
Percent of each aggregate and mineral filler to be used.
d. Asphalt viscosity grade, penetration grade, or performance
grade.
e.
Number of blows of hammer per side of molded specimen.
f.
Laboratory mixing temperature.
g.
Lab compaction temperature.
h.
Temperature-viscosity relationship of the asphalt cement.
i. Plot of the combined gradation on the 0.45 power gradation
chart, stating the nominal maximum size.
j. Graphical plots of stability, flow, air voids, voids in the
mineral aggregate, and unit weight versus asphalt content as shown
in AI MS-02.
k.
Specific gravity and absorption of each aggregate.
l.
Percent natural sand.
m. Percent particles with two or more fractured faces (in coarse
aggregate).
n.
Fine aggregate angularity.
o.
Percent flat or elongated particles (in coarse aggregate).
p.
Tensile Strength Ratio.
q.
Antistrip agent (if required) and amount.
r.
List of all modifiers and amount.
s.
Correlation of hand-held hammer with mechanical hammer.
t.
Percentage and properties (asphalt content, binder properties,
SECTION 02749
Page 16
Previous Page
