165 SECTION 403 PLANTMIX BITUMINOUS OPEN –GRADED SURFACE DESCRIPTION
403.01.01 General. This work consists of placing plantmix bituminous open-graded surface.
This work also consists of constructing milled rumble strips in the plantmix bituminous open-graded surface and other pavement surfaces. MATERIALS
403.02.01 General. Material shall conform to the following Subsections:
General ................................................................................................................................................................... Subsection 401.02.01 Composition of Mixtures .......................................................................................................................................... Subsection 401.02.02 CONSTRUCTION
403.03.01 General. The construction requirements shall conform to Subsections 401.03.01 through 401.03.13,
inclusive, with the exceptions contained in the following Subsections.
403.03.02 Rollers. Operate with each paver a breakdown and finish roller as specified in Subsection
401.03 04.
403.03.03 Joints. Construct longitudinal joints only on the shoulders, or at the edge of travel lanes.
403.03.04 Surface Tolerances. Produce completed surfacing which meets the straightedge and profilograph
requirements of Subsection 402.03.05 with the following additions and exceptions to the profilograph measurement. The pavement smoothness type (Type A, B, or C) will be specified in the Special Provisions. Furnish a profilograph meeting the requirements of Subs ection 402.03.03 and operate the profilograph as specified in Subsection 402.03.05, at the time and date ordered. Painted marks on the open-graded surface, as specified in Subsection 402.03.05, shall not exceed 20 cm2 (4 in.2). Include 10 m (30 ft) of the existing pavement on each end of the project in the profile determination. Make construction joints with the existing pavement meet the requirements of this Subsection. Repair or remove and replace all areas exceeding the profile index requirements and areas representing high points on the profiles having deviations in excess of 10 mm (0.4 in.) as measured according to Test Method No. Nev. T446. Remeasure repaired or replaced areas for conformance with the profile index and for no high points in excess of 10 mm (0.4 in.). Grinding may be utilized for repair to the open-graded surface when approved. Limit gr ound areas to 7.6 m (25 ft) in length. The grinder and grinding operation shall conform to Subsection 402.03.05. Perform additional grinding as necessary to extend the ground area laterally to the nearest lane line or edge of pavement and longitudinally to lines normal to the pavement centerline. Apply a seal coat to ground areas after the surface tolerance specifications have been met. A pply the seal coat according to Section 407.
403.03.05 Spreading and Finishing. Place the material in a windrow in front of the spreading and finishing
machine.
403.03.06 Preparation of Aggregates. Before the introduction of mineral filler, add sufficient moisture to bring
the aggregates to a moisture content where enough free surface moisture is available to thoroughly wet the aggregate and activate the lime. The actual amount of moisture required shall be as approved. 403 PLANTMIX BITUMINOUS OPEN –GRADED SURFACE 166 403.03.07 Milled Rumble Strips. Mill the rumble strips to the dimensions shown in the plans. Use a milling machine that produces a reasonably smooth cut surface with 2 mm (0.08 in.) maximum differentials between peaks and valleys. Locate the rumble strips as shown in the standard plans, unless the location has been modified by the contract plans. The alignment of the edge of the milled pattern will be randomly checked . Re-cut any rumble strip which is misaligned. Some of the shoulders designated for receiving the rumble strips may have widths of approximately 0.6 m (2 ft) from the shoulder stripe to a vertical obstruction of concrete barrier rail or guardrail. There will be no additional compensation for any additional special milling machine necessary to install rumble strips at these locations. Demonstrate on an i nitial 150 m (500 ft) test section that the equipment and method will provide the desired milled rumble strip and surface inside each depression without tearing or snagging the asphalt pavement. If the desired results are not being provided, provide new eq uipment, new method, or make necessary adjustments to provide the desired results. If the initial 150 m (500 ft) test section is unacceptable, repair the surface as directed, make necessary adjustments and retest. Use a power broom or sweeper/vacuum to re move waste material resulting from the operation each day. The milled waste material may also be broomed and uniformly spread on the roadway side slopes at the end of each day’s operations.
403.03.08 Compaction. Perform compactive rolling with a minimum o f 2 complete coverages of the mat, by
each roller, or as directed. A complete coverage is defined as a roller pass forward and back within a given area. METHOD OF MEASUREMENT
403.04.01 Measurement. Plantmix open -graded surfacing will be measured as specified in Subsection
401.04 01.
BASIS OF PAYMENT
403.05.01 Payment. The accepted quantities, measured as provided above, will be paid for at the contract
price per unit of measurement for the pay ite ms listed below that are shown in the proposal. Payment will be full compensation for the work prescribed in this Section. Payment will be made under: Pay Item Pay Unit Plantmix Open -Graded Surfacing [*.......mm (in)] (Wet) ................................ ................................ ................................ ... Metric Ton (Ton) Milled Rumble Strips ................................ ................................ ................................ ................................ ........................ Kilometer (Mile) * Aggregate size in Subsection 705.03.02, and as indicated in the proposal. 167 SECTION 404 COLD RECYCLED BITUMINOUS SURFACE AND PREMIXED BITUMINOUS PAVING MATERIAL DESCRIPTION
404.01.01 General. This work consists of preparing and placing recycled bituminous surface and furnishing,
stockpiling, loading, hauling, and placing premixed bituminous paving material. MATERIALS
404.02.01 Composition of Cold Recycled Mixtures. Compose the recycled bituminous mixture of reclaimed
asphalt pavement, a recycling agent, and lime slurry, as specified.
a.Gradation. Produce cold milled bituminous surface material, to be used in the recycling process, conforming to the following gradation requirements: Sieve Percent Passing by Mass 31.5 mm (1.25 in.) .......................................................................... 100 Separate cold milled bituminous material larger than 31.5 mm (1.25 in.) by screening or other means, break down by mechanical means to pass a 31.5 mm (1.25 in.) sieve and uniformly incorporate into the recycled mixture.
b.Recycled Material. The recycled asphalt mixture shall consist of milled material from the existing pavement, recycling agent, and lime slurry combined in the proportions specified herein, or as directed.
c.Recycling Agent. Add recycling agent to the cold milled material at an estimated rate of 1.5% by mass of the milled material. The actual application rate will be established in the field. Adjust the recycling agent application rate, with concurrence from the Engineer, as pavement conditions change. The request to adjust the application rate should be based on the opinion of a knowledgeable and experienced individual who works for the Contractor. The adjusted application rate shall be between 1.25% and 1.75% by mass of the milled material . If raveling or rutting of the cold recycled material occurs before the overlay is placed, take corrective measures and repair the cold recycled surface at own expense. The Department reserves the right to increase the application rate of recycling agent. In this case, the Department will accept any potential risk associated with the performance of the recycle mat caused by increasing the recycling agent. The type and grade of recycling agent will be specified in the contract. The recycling agent shall meet the applicable requirements of Section 703. For field test acceptance, refer to Subsection 408.02.02. Submit a 3.75 L (1 gal) sample of the recycling agent for approval at least 14 days before commencing recycle operations. In lieu of furnishing a sample of bituminous material, a passing test report may be submitted which has been previously issued by the Department’s Materials Division. The report shall be from the current calendar year. The material type and producer shall be the same as that to be utilized on the project. Add recycling agent to the cold milled material and mix to a homogeneous and uniformly coated mixture. Mix recycling agent in accordance with the temperature requirements of Subsection 406.03.04.
d.Additives. Introduce hydrated lime slurry into the cold milled material. Produce the hydrated lime slurry at the job site and introduce as specified below. Prepare lime slurry containing 1.5% calcium oxide (quicklime) by mass of the milled material conforming to the quicklime specification in ASTM C977. Use water in the slaking operation conforming to Section 722. Submit batch logs and solids content information for each batch.
404.02.02 Composition of Premixed Bituminous Paving Material. Compose the premixed bituminous
paving material of aggregates, bituminous material, and mineral filler. The type and grade of bituminous material and type of aggregate will be specified in the contract.
Source: Nevada Standard Specifications for Road and Bridge Construction, 2014 Edition. Pages 171–172 of 610.