Bid No. 26-10 Paulding Middle School Rink Improvement Plans; Project No. 5131

Lucia Mar Unified School District
Paulding Middle School Rink
Construction Documents
SECTION 32 12 16 - ASPHALT CONCRETE PAVING
PART 1 - GENERAL
1.0 SUMMARY
A. Section Includes: This section covers the work necessary for construction of the
asphalt concrete leveling course and surface course used for the skating rink.
1.1 SUBMITTALS
A. Product date: Within 10 calendar days after the Contractor has received the Owner's
Notice to Proceed, submit:
1. Materials list of items proposed to be provided under this Section.
2. Certificates, signed by the materials producer and the asphalt paving
subcontractor, stating that materials meet or exceed the specified
requirements.
1.2 QUALITY ASSURANCE
A. Standards: The following shall form a part of this specification and shall have the
same force as if reproduced in total herein:
1. Standard Specifications.
2. Materials Manual of Testing and Control Procedures, State of California,
Business and Transportation Agency, Department of Transportation, herein
after referred to as "Materials Manual".
PART 2 - PRODUCTS
2.1 ASPHALT
A. Asphalt concrete surfacing shall consist of a mixture of mineral aggregate and
paving grade asphalt, mixed at a central mixing plant:
1. Asphalt concrete shall be as required by the district.
2. Grade of asphalt shall be AR-4000 or AR-8000 as required.
3. Density shall be 95% of maximum laboratory density as determined by
California Test Method 304.
4. Stability shall be 30 minimum.
5. Mineral aggregate shall be Type A, 1/2-inch maximum size aggregate, fine
grading, and shall conform to the following requirements:
a) The particle size distribution shall be in accordance with the grading
specified for 1/2-inch maximum size aggregate.
Sieve Size Maximum Percentage Passing
3/4-Inch 100
1/2-Inch 95-68
3/8-Inch 72-95
No. 4 52-69
No. 8 35-55
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Paulding Middle School Rink
Construction Documents
No. 30 15-30
No. 200 2.0-8.0
6. Drying, proportioning, and mixing of the materials shall conform to Section
39 of the Standard Specifications.
B. Slurry Seal Coat shall be Type II slurry seal and shall be a one coat process, or
approved equivalent. The manufacturer shall supply the product in sealed
containers, or provide certification of manufacturer to the Engineer.
C. Seal Coat shall be equal to SS1H one coat process, or approved equivalent. The
manufacturer shall supply the product in sealed containers, or provide certification
of the manufacturer to the Engineer.
2.2 AGGREGATE
A. Aggregate base shall conform to the provisions of Section 32 12 15 - Aggregate
Base and as provided herein.
1. The grading of the aggregate shall be "1/2-inch Maximum, Fine" as described
hereon.
B. Sampling and testing will not be required. The Contractor shall provide the mix
design as indicated in this section.
2.3 COMPOSITION OF MIXTURE
A. At least thirty (10) days prior to producing any of the mixture for use in the paving,
the Contractor shall submit to the Engineer for approval a job - mix formula which
meets the requirements herein specified. No asphalt pavement work shall be
undertaken by the Contractor until the Engineer has reviewed the job - mix formula.
B. The Contractor shall be responsible for locating an acceptable source of aggregate.
All tests confirming the suitability of the material for the purpose intended shall be
obtained by the Contractor at the Contractor's expense. Certified copies of the
aggregate test results from an independent testing laboratory shall be furnished to
the Engineer for review at least one week prior to delivery of aggregate to site or
use of aggregate in asphalt concrete.
C. The Contractor shall make arrangement and pay for preparation of the asphalt
concrete job mix formula. The job-mix formula for the asphalt concrete mixture shall
establish the percentage of aggregate passing each sieve size, and the percentage
of bituminous material to be added to said aggregate, and the temperature at which
test results from a qualified, independent testing laboratory confirming the job-mix
formula shall be submitted by the Contractor to the Engineer for review at least two
weeks prior to the start of asphalt concrete paving. Any proposed deviations from
the original job - mix formula shall be resubmitted by the Contractor for review. Test
results of aggregate used in asphalt shall be provided as indicated in this section.
D. The job - mix formula shall indicate the gradation of each of the several aggregate
constituents to be used in the mixture and shall establish the exact proportion of
each constituent to be used to produce a combined gradation of aggregate within
the appropriate limits stated above.
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Paulding Middle School Rink
Construction Documents
E. After a job - mix formula is established and reviewed, all mixtures furnished under
this Contract shall conform to the requirements and tolerances as stated in these
Specifications.
2.4 WEED CONTROL
A. Spray applied herbicide, currently approved for designated use by all applicable
agencies, including air pollution control jurisdiction.
PART 3 - EXECUTION
3.1 PREPARATION OF ROADWAY
A. The finished subgrade shall be tested and approved by the Geotechnical Engineer
prior to the placement of aggregate base.
B. Thoroughly blend base course aggregate on the job site. Construction shall conform
to applicable portions of Section 26 of Standard Specifications. Base material shall
be placed, watered as required, and mechanically compacted until a relative
compaction of 95% has been obtained for the entire thickness of the base. Each
layer of the base course shall be tested and approved by the testing laboratory prior
to the placement of successive layer. Compacted base thickness shall be as
indicated on the drawings.
C. Apply herbicide chemical to all areas to receive paving in strict accordance with the
printed instructions of the manufacturer. Take all necessary safety precautions to
protect against damage or injury due to its poisonous nature. No weed-control
chemical is to be applied to areas designed for planting.
D. A tack coat of asphalt applied at the rate of 0.05 to 0.12 gallons per square yard
shall be applied uniformly to all surfaces on which any course of asphalt concrete is
to be placed.
E. The tack coat shall be emulsified asphalt. The emulsified asphalt may be mixed with
water at the rate of 1 to 2 parts water to 1 part of emulsified asphalt.
F. Preparation of Untreated Roadway:
1. A prime coat shall be applied over the full length of the project and asphalt
concrete pavement shall not be placed until the prime coat has been cured.
2. Should any holes, breaks, or irregularities develop in the roadway surface after
the prime coat has been applied, they shall be patched with asphalt concrete
immediately in advance of placing the asphalt concrete. The Contractor shall
maintain the completed prime coat by blading or brooming with motor patrol
graders, until the asphalt concrete is placed.
3. After the maintenance, patching or repair work has been completed and
immediately prior to placing the asphalt concrete pavement, the surface of
the prime coat shall be swept clean of all dirt, dust or other foreign matter.
3.2 ASPHALT CONCRETE PAVEMENT
A. The proportioning and mixing of asphalt concrete shall conform to the provision
provided herein. The pounds of asphalt per 100 pounds of dry aggregates shall not
vary by more than 5% above or 10% below the amount indicated in the job-mix
formula. This requirement shall apply to samples taken from a single batch,
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Construction Documents
successive batches, at different locations in the production plant, or at any location
on the construction site.
B. Paint binder shall be applied in conformance with the provisions provided herein.
C. Spreading equipment and methods shall conform to the provision provided herein.
No asphalt concrete shall be placed on any section of compacted aggregate base
that has not been reviewed by the Geotechnical Engineer.
D. The asphalt concrete shall be compacted in accordance with the provisions
provided herein. The weight and pressure of the Contractor's pneumatic-tired roller
will be reviewed, but not designated or approved, by the Geotechnical Engineer.
E. Confirm areas associated with placement of asphalt concrete conform to the
provisions provided herein.
3.3 PLACEMENT OF ASPHALT CONCRETE PAVING
A. Install the specified curbs, headers and stakes, to achieve the arrangement of paving
shown on the drawings. All unconfined edges shall be confined with 2 inch by 4
inch redwood header boards staked with a 1 inch by 3 inch redwood stake 18 inches
long minimum at 6 feet on-center. Two 1 inch by 4 inch pieces may be installed
together for bending along curves. Offset all joints by 2 feet.
B. Remove all loose materials from the compacted base.
C. Apply the specified prime coat, and tack coat where required, and allow to dry, in
accordance with the manufacturer's recommendations as approved by the
Engineer.
D. Asphalt paving shall be installed in minimum lifts of 1.5 inches.
E. Adjust frames, covers and utility vaults, if so required, to meet final grades.
F. Do not accept receipt or asphalt concrete materials unless it is covered with a
tarpaulin until unloaded, and unless the material has a temperature of not less than
280 degrees Fahrenheit.
3.4 CONNECTIONS WITH EXISTING FACILITIES
A. Where it is necessary to remove existing asphalt surfaces or oil mat surfaces to
provide proper meet lines and riding surfaces, the Contractor shall burn or chip the
existing surface so that there will be sufficient depth to provide a minimum of one
inch of asphalt concrete, and the waste material shall be disposed of to the
satisfaction of the Engineer and Federal, State and Local Ordinances. Prior to placing
the asphalt concrete these areas shall be tacked. Meet lines shall be straight and the
edges vertical. The edges of meet lines cut shall be painted with liquid asphalt or
emulsified asphalt prior to placing asphalt concrete. After placing the asphalt
concrete, the meet lines shall be sealed by painting with a liquid asphalt or
emulsified asphalt and immediately covered with clean, dry sand.
B. Prior to laying down the second strip of asphalt concrete pavement, the edge of the
first strip laid and other contact surfaces such as curbs, manhole frames, and similar
materials shall be painted with emulsified asphalt or liquid asphalt to provide closely
bonded watertight joints. This work shall be done in a manner that will prevent
staining adjacent surfaces not intended to be coated.
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Paulding Middle School Rink
Construction Documents
3.5 COMPACTION
A. Rolling shall continue until all roller marks are eliminated and a minimum density of
140 pcf has been obtained.
B. Field density tests shall be made by a commercial testing laboratory retained by the
Owner, and the test results submitted to the Geotechnical Engineer for review.
3.6 JOINTS
A. The placing of the top or wearing course shall be as nearly continuous as possible,
and the roller shall pass over the unprotected end of the freshly laid mixture only
when the laying of the course is discontinued for such length of time as to permit
the mixture to become chilled.
B. When the work is resumed the previously compacted mixture shall be cut back to
produce a slightly beveled edge of the full thickness of the course. The material
which is cut away shall be wasted and the new mix shall be laid against the fresh
cut. Rollers or tamping irons shall be used to seal the joints.
3.7 SURFACE TOLERANCE
A. Tests for Conformity with the specified crown and grade shall be made by the
Contractor immediately after initial compression. Any variation shall be immediately
corrected by the removal or addition of materials and by continuous rolling.
B. The completed surface of the top of wearing course shall be of uniform texture,
smooth, uniform as to crown and grade and free from defects of all kinds. The
completed surface shall not vary more than 1/8 inch from the lower edge of a 10-
foot straight edge placed on the surface parallel to the centerline.
C. After completion of the final rolling, the smoothness and grade of the surface shall
again be tested by the Contractor.
D. When deviations in excess of the above tolerances are found, the pavement surface
shall be corrected by the addition of asphalt concrete mixture of an appropriate
class to low places or the removal of material from high places by methods
satisfactory to the Engineer, or by removal and replacement of the wearing course
asphalt concrete. Correction of defects shall be carried out until there are no
deviations anywhere greater than the allowable tolerances.
E. All areas in which the surface of the completed pavement deviates more than twice
the allowable tolerances described above shall be removed and replaced to the
satisfaction of the Engineer.
F. All costs involved in making the corrections of defects described above shall be
borne by the Contractor and no compensation will be made for this work.
3.8 APPLICATION OF SEAL OR SLURRY COAT
A. Areas that have received new AC shall have a minimum of 30 day cure time prior to
application of either seal or slurry coat. Prepare the surfaces, mix the seal coat
material, and apply in accordance with the manufacturer's recommendations as
approved by the Geotechnical Engineer.
B. Appy one coat of the specified sealer.
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Paulding Middle School Rink
Construction Documents
C. Achieve a finished surface seal which, when dry and thoroughly set, is smooth,
tough, resilient, of uniform black color, and free from coarse textured areas, lap
marks, ridges and other surface irregularities.
3.9 SAMPLES
A. The contractor shall, without additional charge, provide the Geotechnical Engineer
with test results of samples of asphalt concrete cut from the completed pavement
or the individual courses thereof. The minimum number of tests cores shall be two
per day during paving. The number of cores shall be increased if problems are
indicated. The contractor shall also provide the Geotechnical Engineer with test
results or samples of the uncompressed asphalt concrete mixtures, and all materials
incorporated in the work.
3.10 UNFAVORABLE WEATHER
A. Asphalt for prime coat shall not be applied when the ground temperature is lower
than 50 degrees F without written permission of the Geotechnical Engineer.
B. Asphalt concrete shall not be placed when the atmospheric temperature is less then
40 degrees F nor during heavy rainfall.
3.11 ALLOWABLE TOLERANCES
A. Surface Smoothness:
1. The surface of the finished base course shall not vary more then 3/8 inch, plus
or minus, in 10 feet.
2. The surface of the finished asphalt concrete shall not vary more then 14 inch,
plus or minus, in 10 feet.
B. The compacted paving or base course thickness shall not vary more than 14 inch
plus or minus, based on an average of five (5) measurements per 10,000 square feet,
taken at randomly selected locations by testing laboratory.
C. Provide hot plant mixed asphalt concrete paving materials.
1. Temperature leaving the plants shall be 290 degrees Fahrenheit minimum, 320
degrees Fahrenheit maximum.
2. Temperature at time of placing shall be 280 degrees minimum.
3.12 SURFACE FINISH
A. Surface finish shall be uniform and consistent in color and texture throughout the
extents of the project and shall be achieved, at a minimum, by applying a slurry
coat.
END OF SECTION
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