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448 South Hill Street
<br />Suite 1001
<br />Los Angeles, CA 90013
<br />Phone: 310-975-2061
<br />Reviewed By:Proj #:
<br />140 Newport Center Drive,
<br />Suite 100
<br />Newport Beach, CA 92660
<br />O: 949.478.8800
<br />www.kpff.com
<br />KPFF
<br />DLX8
<br />515 E Dyer Rd., Santa Ana, CA 92707
<br />Owner
<br />AK2300128
<br />Nelco Architecture,
<br />Inc.
<br />Issue:No:Date:
<br />CD 30 2023/11/03
<br />CD 50 2024/05/22
<br />CD 90 2025/03/07
<br />1416 NW 46TH Street
<br />Suite 105-138
<br />Seattle, WA 98107
<br />WWW.NELSONWORLDWIDE.COM
<br />Phone: (206) 408-8501
<br />PERMIT SET 2025/04/17
<br />CIVIL SPECIFICATIONS
<br />C6.01
<br />SECTION 32 12 16 - HOT-MIX ASPHALT (HMA) PAVING
<br />PART 1 - GENERAL
<br />1.1 SUMMARY
<br />A.This Section includes hot-mix asphalt paving.
<br />B.Traffic Stripes and Pavement Marking.
<br />1.traffic stripe: A longitudinal centerline or a longitudinal lane line used for separating traffic lanes in the same direction of travel or in the opposing direction of travel or a longitudinal
<br />edge line marking the edge of the traveled way or the edge of a lane at a gore area separating traffic at an exit or entrance ramp. A traffic stripe is a traffic line as shown.
<br />2.Pavement marking: A transverse marking such as (1) a limit line, (2) a stop line; or (3) a word, symbol, shoulder, parking stall, or railroad grade crossing marking.
<br />1.2 SUBMITTALS
<br />A.Product Data: For each type of product indicated. Include technical data and tested physical and performance properties.
<br />B.Job-Mix Designs: Certification, by authorities having jurisdiction, of approval of each job mix proposed for the Work.
<br />C.Material certificates.
<br />D.Log of placement of asphalt, including dates, times, temperature readings and other pertinent information.
<br />1.3 QUALITY ASSURANCE
<br />A.Manufacturer Qualifications: Manufacturer shall be registered with and approved by authorities having jurisdiction or the DOT of the state in which Project is located.
<br />B.Standard Specifications: Comply with the Standard Specifications for Public Works Construction (SSPWC) and the California Department of Transportation (Caltrans), latest editions and
<br />supplements for asphalt paving work. These Specifications apply only to performance and materials and how they are to be incorporated into the Work. The legal/contractual relationship
<br />sections and the measurement and payment sections do not apply to this document.
<br />C.Asphalt-Paving Publication: Comply with AI MS-22, "Construction of Hot Mix Asphalt Pavements," unless more stringent requirements are indicated.
<br />1.4 PROJECT CONDITIONS
<br />A.Environmental Limitations: Do not apply asphalt materials if subgrade is wet or excessively damp or if the atmospheric temperature is at least 50 deg F and rising at time of placement or
<br />during unsuitable weather.
<br />B.Pavement-Marking Paint: Proceed with pavement marking only on clean, dry surfaces and at an ambient or surface temperature range recommended by the paint manufacturer.
<br />PART 2 - PRODUCTS
<br />2.1 AGGREGATES
<br />A.Coarse Aggregate (Type III Asphalt Concrete Mixture): Conforming to SSPWC 203-6.2.3.
<br />B.Fine Aggregate (Type III Asphalt Concrete Mixture): Conforming to SSPWC 203-6.2.3.
<br />C.Mineral Filler: Conforming to SSPWC 203-6.2.4.
<br />2.2 ASPHALT CONCRETE MIXTURE
<br />A.Composition and Grading: Conforming to SSPWC Sections 203-1 and 203-6.5.
<br />2.3 ASPHALT MATERIALS
<br />A.Asphalt Binder: Paving asphalt, conforming to SSPWC 203-1.2 and asphalt concrete curb shall be PG 70-10 according to SSPWC 203-6.2.1.
<br />B.Tack Coat: PG 64-10 conforming to SSPWC 302-5.2.3.
<br />C.Mixes: Hot-Mix Asphalt (HMA):
<br />Wearing Course: Dense, hot-laid, hot-mix asphalt plant mix III-C3, PG 64-10 designed in conformance with SSPWC Section 203.
<br />Base Course: Dense, hot laid, hot-mix asphalt plant mix III-B2, PG 64-10 designed in conformance with SSPWC Section 203.
<br />D.Fog Seal: CSS-1 conforming to SSPWC 203-3.
<br />2.4 AUXILIARY MATERIALS
<br />A.Herbicide: Commercial chemical for weed control, registered by the EPA. Provide in granular, liquid, or wettable powder form.
<br />B.Pavement-Marking Paint: Latex, waterborne emulsion, lead and chromate free, ready mixed, complying with Caltrans Standard Specifications - Section 84 (Federal Specification
<br />No. TT-P-1952E for Blue, Red and Green paint; and State of California Standard Specification No. PTWB-01R2 for White, Yellow and Black paint) with drying time of less than 45
<br />minutes.
<br />1.Color: White, Yellow, and Blue as indicated on the plans.
<br />C.Wheel Stops: Precast, air-entrained concrete.
<br />1.Dowels: Galvanized steel, 3/4-inch diameter, 24-inch minimum length.
<br />PART 3 - EXECUTION
<br />3.1 ASPHALT CONCRETE AND ASPHALT CONCRETE PAVEMENT
<br />A.All work shall be in conformance with SSPWC Sections 203-6 and 302-5.
<br />3.2 COLD MILLING
<br />A.Clean existing pavement surface of loose and deleterious material immediately before cold milling. Remove existing asphalt pavement by cold milling to grades and cross sections
<br />indicated.
<br />1.Mill to a depth of 2 inches.
<br />3.3 PATCHING
<br />A.Hot-Mix Asphalt Pavement: Saw cut perimeter of patch and excavate existing pavement section to sound base. Excavate rectangular or trapezoidal patches, extending 12 inches into
<br />adjacent sound pavement, unless otherwise indicated. Cut excavation faces vertically. Remove excavated material. Recompact existing unbound-aggregate base course to form new
<br />subgrade.
<br />B.Tack Coat: Tack coat shall be uniformly applied by a distributor truck at a minimum rate of SS-1h emulsified asphalt in conformance to SSWC Table 302-5.8(A) or the application rate to
<br />achieve the minimum residual rate in conformance to SSWC Table 302-5.8(B), whichever is greater. For PG 64-10 paving asphalt, the application rate shall be a minimum of the residual
<br />rate in conformance to SSWC Table 302-5.8(B).
<br />C.Patching: Fill excavated pavements with hot-mix asphalt base mix and, while still hot, compact flush with adjacent surface.
<br />3.4 SURFACE PREPARATION
<br />A.Proof-roll subbase using heavy, pneumatic-tired rollers to locate areas that are unstable or that require further compaction.
<br />B.Immediately before placing asphalt materials, remove loose and deleterious material from substrate surfaces. Ensure that prepared subgrade is ready to receive paving.
<br />1.Sweep loose granular particles from surface of unbound-aggregate base course. Do not dislodge or disturb aggregate embedded in compacted surface of base course.
<br />C.Herbicide Treatment: Apply herbicide according to manufacturer's recommended rates and written application instructions. Apply to dry, prepared subgrade or surface of
<br />compacted-aggregate base before applying paving materials.
<br />D.Tack Coat: Apply uniformly to surfaces of existing pavement at a rate of 0.05 gallon per square yard.
<br />1.Allow tack coat to cure undisturbed before applying hot-mix asphalt paving.
<br />2.Avoid smearing or staining adjoining surfaces, appurtenances, and surroundings. Remove spillages and clean affected surfaces.
<br />3.Asphalt binder tack coat temperature must be in the range of 285 to 350 deg F when applied.
<br />3.5 HOT-MIX ASPHALT PLACING
<br />A.Machine place hot-mix asphalt on prepared surface, spread uniformly, and strike off. Place asphalt mix by hand to areas inaccessible to equipment in a manner that prevents segregation of
<br />mix. Place each course to required grade, cross section, and thickness when compacted.
<br />1.Spread mix at minimum temperature of 285 deg F and maximum temperature of 350 deg F.
<br />2.Regulate paver machine speed to obtain smooth, continuous surface free of pulls and tears in asphalt-paving mat.
<br />B.Place paving in consecutive strips not less than 10 feet wide unless infill edge strips of a lesser width are required.
<br />C.Promptly correct surface irregularities in paving course behind paver. Use suitable hand tools to remove excess material forming high spots. Fill depressions with hot-mix asphalt to
<br />prevent segregation of mix; use suitable hand tools to smooth surface.
<br />3.6 FOG SEAL
<br />A.Apply asphaltic emulsion for fog seal coat at a residual asphalt rate of 0.2 to 0.06 gal/sq yd.
<br />B.Apply fog seal coat when the ambient temperature is above 40 degrees F.
<br />C.At the time of application, the temperature of asphaltic emulsion must be from 130 to 180 degrees F.
<br />D.Apply asphaltic emulsion when the ambient air temperature is from 65 to 110 degrees F and pavement surface is at least 80 degrees F.
<br />E.Do not apply asphaltic emulsion when weather forecasts predict the ambient air temperature will fall below 39 degrees F within 24 hours after application.
<br />F.When tested under California Test 339, the application rate for asphaltic emulsion must not vary from the average by more than:
<br />a.15 percent in the traverse direction
<br />b.10 percent in longitudinal direction
<br />3.7 COMPACTION
<br />A.General: Begin compaction as soon as placed hot-mix paving will bear roller weight without excessive displacement. Compact hot-mix paving with hot, hand tampers or vibratory-plate
<br />compactors in areas inaccessible to rollers.
<br />1.Pave HMA in maximum 3” thick compacted layers.
<br />2.Minimum atmospheric temperature shall be 55 deg F, and minimum surface temperature shall be 60 deg F. If the surface to be paved is both in sunlight and shade, pavement surface
<br />temperatures must be taken in the shade.
<br />3.Complete compaction for Base Course before surface temperature drops below 250 deg F, and for Wearing Course before surface temperature drops below 150 deg F.
<br />B.Breakdown Rolling: Complete breakdown or initial rolling immediately after rolling joints and outside edge. Examine surface immediately after breakdown rolling for indicated crown,
<br />grade, and smoothness. Correct laydown and rolling operations to comply with requirements.
<br />C.Intermediate Rolling: Begin intermediate rolling immediately after breakdown rolling while hot-mix asphalt is still hot enough to achieve specified density. Continue rolling until hot-mix
<br />asphalt course has been uniformly compacted to the following density:
<br />1.Average Density: 92 percent of reference maximum theoretical density according to ASTM D 2041, but not less than 90 percent nor greater than 96 percent.
<br />D.Finish Rolling: Finish roll paved surfaces to remove roller marks while hot-mix asphalt is still warm.
<br />E.Protection: After final rolling, do not permit vehicular traffic on pavement until it has cooled and hardened.
<br />F.Erect barricades to protect paving from traffic until mixture has cooled enough not to become marked.
<br />3.8 INSTALLATION TOLERANCES
<br />A.Thickness: Compact each course to produce the thickness indicated within the following tolerances:
<br />1.Base Course: Plus or minus 1/2 inch.
<br />2.Wearing Course: Plus 1/4 inch (no minus).
<br />3.Total Base Course plus Wearing Course shall not be less than specified thickness.
<br />B.Surface Smoothness: Compact each course to produce a surface smoothness within the following tolerances as determined by using a 10-foot straightedge applied transversely or
<br />longitudinally to paved areas:
<br />1.Base Course: 1/4 inch
<br />2.Wearing Course: 1/8 inch
<br />3.Crowned Surfaces: Test with crowned template centered and at right angle to crown. Maximum allowable variance from template is 1/4 inch.
<br />3.9 PAVEMENT STRIPING AND MARKING
<br />A.Do not apply pavement-marking paint until layout, colors, and placement have been verified with Architect.
<br />B.Allow paving to age before starting pavement striping and marking, as recommended by the paint manufacturer.
<br />C.Sweep and clean surface to eliminate loose material and dust in addition to recommended surface preparation by the paint manufacturer.
<br />D.Apply paint with mechanical equipment to produce pavement markings, of dimensions indicated, with uniform, straight edges. Apply at manufacturer's recommended rates to provide a
<br />minimum wet film thickness of 15 mils.
<br />E.Do not paint if the atmospheric temperature could drop below 50 deg F during the drying period.
<br />3.10 WHEEL STOPS
<br />A.Securely attach wheel stops into pavement with not less than two galvanized steel dowels embedded at one-quarter to one-third points. Securely install dowels into pavement and bond to
<br />wheel stop. Recess head of dowel 1 inch beneath top of wheel stop.
<br />3.11 FIELD QUALITY CONTROL
<br />A.Testing Agency: Owner will engage a qualified independent testing and inspecting agency to perform field tests and inspections and to prepare test reports.
<br />B.Additional testing and inspecting, at Contractor's expense, will be performed to determine compliance of replaced or additional work with specified requirements.
<br />C.Remove and replace or install additional hot-mix asphalt where test results or measurements indicate that it does not comply with specified requirements.
<br />3.12 DISPOSAL
<br />A.Except for material indicated to be recycled, remove excavated materials from Project site and legally dispose of them in an EPA-approved landfill.
<br />END OF SECTION 32 12 16
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