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BCBC
& ID-2 Binder:
BCBC & ID-2 Binder are separate
mix designs but have essentially the same properties.
They both use a maximum 1-1/2 inch coarse crushed limestone
and have a very open texture. Theses large aggregate,
or stones, in combination with small aggregate and asphalt
form a very stable base course. ID-2 Binder uses the
same mix design as BCBC but adds additional asphalt
and fine aggregate. BCBC is designed to be placed in
lifts 2 inches and deeper, especially in areas with
heavy truck traffic. Both mixes are designed to be laid
as a base course for strength purposes, and then coupled
with a wearing course to seal the open pores of the
mix. On light traffic areas such as parking lots and
driveways, Grannas Bros. recommends placing a 2 inch
base course and a 1-1/2 inch ID-2 wearing course.
Recommended
Paving Depth: 2” (Light auto traffic only)
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ID-3
Wearing Course:
ID-3 Wearing Course is basically
a compromise mix, blending the strength characteristics
of a base course with the sealing properties of a surface
course. This mix was designed to be used by customers
who wanted to pave with a base course only, with out
placing a surface wearing course immediately. It contains
crusted limestone particles 1 inch and smaller cemented
together by asphalt oil. Because of the smaller aggregate,
the ID-3 sacrifices some strength properties of the
BCBC and Binder courses ins order to provide a tighter,
better sealing product. However, it does allow some
water penetration, and a surface course should be placed
on it withing three to five years, depending on the
strength of the stone base. Grannas Bros. recommends
placing 2-1/2 inches of ID-3 to provide a tighter, smoother
textured finish and give added stability.
Recommended Paving Depth: 2-1/2” (Light auto traffic
only)
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ID-2
Wearing Course:
ID-2 Wearing Course is placed
as a surface coat, or topcoat, on top of a BCBC or Binder
course. It seals the open pores of the base course and
provides a smooth, even finish. This mix uses a maximum
½ inch course aggregate, in combination with
fine aggregate and a higher content of asphalt. ID-2
Wearing Courses can be found on Pennsylvania Department
of Transportation Highways, commercial parking lots,
and residential driveways. Whether resurfacing existing
blacktop of placing a surface course on a fresh base
course, Grannas Bros. recommends placing 1-1/2 inches
of this material. Grannas Bros. also produces an ID-2
Special Wearing Course that adds additional limestone
particles to give it an even smoother finished product.
This mix works especially well on driveways.
Recommended Paving Depth:
1-1/2” (Light auto traffic only)
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