removed, replaced with clean aggregate, and rerolled, as directed.
The
Contractor shall maintain and protect the treated areas by use of
barricades for a period not to exceed 30 days.
3.3
APPLICATION OF SECOND COURSE
3.3.1
Bituminous Treatment
The bituminous material for the second course shall follow within 48 hours
after construction of the first course, weather permitting. Excess
aggregate shall be removed prior to the second application of bituminous
material. If the treated surface is excessively moistened by rain, the
surface shall be allowed to dry for such time as deemed necessary. The
second application of bituminous material shall be applied in the manner
specified in paragraph APPLICATION OF FIRST COURSE, including temperature
and QUANTITY LIMITS.
3.3.2
Aggregate
Immediately following the second application of bitumen, aggregate
conforming to the gradation and limits specified in paragraph QUANTITY
LIMITS shall be spread uniformly over the bituminous material. Aggregate
shall be spread and processed in the manner specified for the first course.
3.3.3
Brooming and Rolling Second Course
The surface shall be rolled and broomed in the manner specified for the
first course until a thoroughly bonded, smooth, even-textured surface is
produced. Surplus aggregate shall be swept off the surface and removed
prior to final acceptance.
3.4
APPLICATION TEMPERATURE OF MATERIALS
3.4.1
Cutback Asphalt
As necessary to provide an application viscosity between 0.00004 and
0.00012 square meter per second 40 and 120 centistokes, kinematic or 20 and
60 seconds, Saybolt Furol.
3.4.2
Emulsified Asphalt
Within the following ranges:
RS-1: 21.1-60 degrees C 70-140 degrees F.
RS-2, CRS-1 and CSR-2: 51.7-85 degrees C 125-185 degrees F.
3.4.3
Asphalt Cement
As necessary to provide an application viscosity between 0.00004 and
0.00012 square meter per second 40 and 120 centistokes, kinematic or 20 and
60 seconds, Saybolt Furol.
3.5
TRIAL APPLICATION
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NOTE: This paragraph will be deleted if project
size does not warrant trial application.
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SECTION 02745
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