ASPHALT CONCRETE PAVING

ASPHALT CONCRETE PAVING


PART 1 -- GENERAL

1.01     SUMMARY

Division 0, Contract requirements and Division 1, General Conditions apply to this section.

1.02     DESCRIPTION

Work included:  Provide base course, asphaltic concrete paving, weed killer, striping and sealer where shown on the Drawings, as specified herein, and as needed for a complete and proper installation.  All of the requirements of the Contract Documents apply to this Section.

1.03     QUALITY ASSURANCE

Use adequate number of skilled workman who are thoroughly trained and experienced in the necessary craft and who are completely familiar with the specified requirements and methods needed for proper performance of the work of this Section.

1.04     STANDARDS

A References  herein  to  State  Standard  Specifications  are  to  the  Standard Specifications of the Department of Transportation, State of California (Caltrans), Latest Edition.

B References herein to Standard Specifications are to the Standard Specifications for Public Works Construction, prepared by the Southern California Chapters of the American Public Works Association and The Associated General Contractors of America, 1995 Edition.

1.05     GUARANTEE

Submit one year guarantee in accordance with and in form required in Division 1. Guarantee shall include bringing to grade and repairing of defective surfacing due to grade settlement of fills, trench fills or any portion of base or surfacing.

1.06     SUBSTITUTIONS

Substitutions will be considered per Article 6.4 of the General Conditions.

1.07     SUBMITTALS

Product data:   Within 35 calendar days after the Contractor has received the Owner's notice to proceed, submit:

A          In accordance with Article 6.13 of the General Conditions

B          Materials list of items proposed to be provided under this Section.

C Certificates,  signed  by  the  materials  producer  and  the  asphaltic  paving subcontractor, stating that materials meet or exceed the specified requirements.


PART 2 -- PRODUCTS

2.01     PAVEMENT SYSTEM

See Drawings for recommended section.

2.02     AGGREGATES

A. Provide aggregates consisting of crushed stone, gravel, sand, or other sound, durable, mineral materials processed and blended, and naturally combined.

B. Base aggregate:            State  Standard  Specifications,  Section  26,  Class  2, maximum size:

1.         Base courses over 6 inches:  1-1/2 inch.

2.         Other base courses:  3/4 inch.

3. The aggregate base shall also have a sand equivalent value of not less than 30 when tested in conformance with Test Method No. California 217.

C.         Aggregates for asphaltic concrete paving:           Standard Specifications Section 203-6, Type I - Class C (1/2") for 2" lifts. Aggregate shall be Type I - Class D (3/8") for 1" lifts.

D.         Slurry Seal Aggregate:  Standards Specification, Section 203-5.

2.03     ASPHALTS

A. Asphalt concrete pavement shall comply with Section 203-6 and 302-5 of the Standard Specifications, except that asphalt concrete shall not be placed when the atmospheric temperature is below 50°F.  Paving asphalt shall be AR 4000.

B. Slurry Seal Binder:        Standard Specifications, Section 203-5; SS-1H asphaltic emulsion.

C.         Comply with provisions of Standard Specifications, Section 302-5:

1.         Asphalt cement:             Penetration grade 50/60

2.         Prime coat:                    SC-70 Liquid Asphalt

3.         Tack coat:                      Uniformly emulsified, grade SS-1H

2.04     MIXING ASPHALTIC CONCRETE MATERIALS

Provide hot plant mixed asphaltic concrete paving materials in accordance with Standard
Specifications, Section 203-6.

1.         Temperature leaving the plant:  290°F. Minimum, 320°F maximum.

2.         Temperature at time of placing: 280°F minimum.

2.05     WEED KILLER

A. Provide a dry, free-flowing, dust-free chemical compound containing not less than 30% sodium chlorate or a chlorpyritos or Permethrin  compound, non-flammable, not creating a fire hazard when applied in accordance with the manufacturer's recommendations, soluble in water, and capable of being spread dry or in solution.   Chemical shall comply with Section 815-3.6 of FMA MP 5.

B.         Acceptable products:

1.         "Duraban TC":

2.         "Dragnet":

2.06     HEADERS AND STAKES

Provide Redwood, Construction grade, in dimensions shown on the Drawings or
2 x 4 sizes for the use where dimensions are not shown on the Drawings.

2.07     MARKING PAINT

Provide traffic paint as indicated on the Drawings and as manufactured by J.E. Bauer
Company, in colors selected by the Architect from standard colors of the manufacturer.

PART 3 -- EXECUTION

3.01     SURFACE CONDITIONS

Examine the areas and conditions under which work of this Section will be performed. Correct conditions detrimental to timely and proper completion of the Work.   Do not proceed until unsatisfactory conditions are corrected.

3.02     FINAL PREPARATION OF SUBGRADES

A. After  preparation  of  subgrade  as  specified  in  another  Section  of  these Specifications, thoroughly scarify and sprinkle the entire area to be paved, and then compact to a smooth, hard, even surface of 90% compaction to receive the base aggregates or 95% to receive the asphaltic concrete.

B. Apply the specified weed killer to the entire area to be paved.   Adhere to the manufacturer's application recommendations.

3.03 PLACEMENT OF BASE COURSE
A. Base:
1.         The aggregate base material shall be spread as specified in Section 26-
1.035 and 26-1.04 of the State Standard Specifications.  The aggregate base material shall be compacted as specified in Section 26-1.05 of the State Standard Specifications.

2. Spread  the  specified  base  material  to  a  thickness  providing  6  inch minimum thickness unless otherwise noted.

3.         Compact to 95%.

B.         Thickness  tolerance:     Provide  the  compacted  thicknesses  shown  on  the
Drawings within a tolerance of minus 0.0" to plus 0.5".

C. Smoothness tolerance:   Provide the lines and grades shown on the Drawings within a tolerance of 3/8" in ten feet.

1. Deviations:  Correct by removing materials, replacing with new materials, and reworking or recompacting as required.

D. Moisture content:   Use only the amount of moisture needed to achieve the specified compaction.

3.04     PLACEMENT OF ASPHALTIC CONCRETE PAVING

A. The method of depositing, distributing and rolling the asphalt concrete shall be in accordance with Sections 302-5.4 and 302-5.5 of the Standard Specifications.

B. Install the specified headers and stakes to achieve the arrangement of paving shown on the Drawings.

C.         Remove all loose materials form the compacted base.

D.         Apply  the  specified  prime  coat,  and  tack  coat  where  required,  Standard
Specification, Sections 302-5.2 and 302-5.3, and allow to dry.

E.         Adjust frames and covers, if so required, to meet final grades.

F.         Receipt of asphaltic concrete materials:

1. Do  not  accept  material  unless  it  is  covered  with  a  tarpaulin  until unloaded, and unless the material has a temperature of not less than
280°F.

2. Do not commence placement of asphaltic concrete materials when the atmospheric temperature is below 50° F, nor during fog, rain, or other unsuitable conditions.

G.         Spreading:

Spread material in manner which requires the least handling.

H.         Rolling:

1. After the material has been spread to the proper depth, roll until the surface is hard, smooth, unyielding, and true to the thickness and elevations shown on the Drawings.

2.         Roll in at least two directions until no roller marks are visible.

3.         Finished paving smoothness tolerance:

a.         Free from “birdbaths”.

b.         No deviations greater than 1/8" in six feet.

3.05     FLOOD TEST

A.         Prior to application of seal coat, perform a flood test in the presence of the
Architect.

B.         Method:
1. Flood the entire asphaltic concrete paved area with water by use of a tank truck or hoses.

2. If a depression is found where water ponds to a depth of more than 1/8" in six feet, fill or otherwise correct to provide proper drainage.

3. Feather and smooth the edges of fill so that the joint between fill and original surface is invisible.

3.06     APPLICATION OF SEAL COAT

A.         Prepare the surfaces, mix the seal coat material, and apply in accordance with
Standard Specifications, Sections 302-4.

B.         Apply one coat of the specified sealer.

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.

3.07     PAVEMENT MARKING

A. Prepare  the  surfaces  and  apply  the  specified  paint  in  accordance  with  the manufacturer's recommendations as accepted by the Architect.

B. Contractor shall provide two coats as necessary to provide sufficient contrast from paving.

3.08     PROTECTION

Protect the asphaltic concrete paved areas from traffic until the sealer is set and cured and does not pick up under foot or wheeled traffic.