404PRIME COAT

403.06 FAILURE TO COMPLY. Should the Contractor fail to comply with any portion of this

provision, a penalty will be imposed for each tacked subsection not in compliance with these requirements. The penalty for a subsection will be five percent (5%) of the combined contract cost for asphalt and asphalt emulsion tack coat for the par ticular subsection in nonc ompliance. The total penalty for a day/night’s paving will be the combi ned fines from all noncompliant subsections or $2500.00, whichever is greater. A tacked subsection will be defined as that area covered with tack coat, the width of a single paving machine’s actual asphalt placement, extending to the end of that particular pass of tack coat but not to exceed 0.2 (two-tenths) miles in length. This means that if the Contractor tacks in excess of 0.2 mile on a pass t hen there would exist multiple tacked subsections each subject to the terms and conditions of this provision.

404.01 DESCRIPTION. This work consists of treating an existing gravel surface with bituminous

material, and blotter material, if required, in preparation for receiving a subsequent bituminous course, at the locations indicated on the Plans or as directed by the Engineer, all in accordance with these Specifications. 404.02 MATERIALS. 404.02.1 Bituminous Materials. Bituminous material used as prime coat may be any of those enumerated in Subsection M.03.03 of these Specifications. They are:

404.03 Construction Methods.

404.03.1 Equipment. The equipment to be used shall include a power broom, approved broom

dragging equipment, rollers, a self -propelled mechanical spreader for spreading coarse aggregate, 4−29a mechanical revolving cylinder-type aggregate sp reader or mechanical roller-type hopper spreader for spreading fine aggregate that can be so adjusted as to spread accurately the required amount of material per square yard, a bituminous distri butor so designed, equipped, maintained, and operated that bituminous material at even heat may be applied uniformly on variable widths of surface up to 15 feet at readily determined and controlled rates from 0.02 to 2.0 gallons per square yard, with uniform pressure. Distributor equipment shall include a tachometer, pressure gauges, sampling valve, accurate volume measuring devices or a calibrated tank, and a thermometer for measuring temperature of tank contents. Distributors shall be equipped with a power unit for the pump and full circulation spray bars adjustable vertically and laterally, and equipment for heating bituminous material. Other types of aggregate spreaders ma y be used provided they accomplish results equal to those obtained by the types described herein, and are approved. Rollers shall be self-propelled steel wheel, vibratory or pneumatic type. The number and weight of rollers shall be sufficient to compact the mixture to form a firm, even and unyielding surface. 404.03.2 Preparation of Surface. The surface to be primed shall be shaped to the required grade and section, shall be free from all ruts, corrugations, segregated material or other irregularities and shall be uniformly compacted. Delays in priming will necessitate reprocessi ng or reshaping to provide a smooth compacted surface. 404.03.3 Application of Bituminous Material. Bituminous material shall be applied to the width of the section to be primed by means of a pressure distributor in a uniform, continuous spread. When traffic is maintained, not more than one-half of the width of the section shall be treated in one application. Care shall be taken that the application of bituminous material at the junctions of spreads is not in excess of the specified amount. Excess bituminous material shall be squeegeed from the surface. Skipped areas or deficiencies shall be corrected. Building paper shall be placed over the end of the previous applications and the joining application shall start on the building paper. Building paper used shall be removed and satisfactorily disposed of. When traffic is maintained, one-way traffic shall be permitted on the untreated portion of the roadbed. As soon as the bituminous material has been absorbed by the surface, and blotter material if required, will not pick up, traffic shall be transferred to the treated portion and the remaining width of the section shall be primed. The quantities, rate of application, temperatures and areas to be treated shall be approved before application of the prime coat. 404.03.4 Application of Blotter Material. If after the application of the prime coat, the bituminous material fails to penetrate within the time specified and the roadway must be used by traffic, blotter material shall be spread in the amounts required to absorb any excess bituminous material. 404.03.5 Weather Limitations. Bituminous material shall not be applied on a wet surface or when weather conditions would prevent its proper constr uction. Prime coat will not be applied when the air temperature is below 50 OF unless otherwise permitted by the Engineer. 4−30 404.04 METHOD OF MEASUREMENT.

404.04.1 Bituminous Material. "Prime Coat" will be measured by the number of square yards

actually applied in accordance with the Plans and/or as directed by the Engineer. 404.04.2 Blotter Material. "Blotter Material" will be measured by either the number of tons or the number of cubic yards, as the case may be, actually applied in accordance with the Plans and/or as directed by the Engineer. 404.05 BASIS OF PAYMENT.

404.05.1 Prime Coat . The accepted quantities of "Prime Coat" will be paid for at the contract unit

price per square yard as listed in the Proposal. 404.05.2 Blotter Material. The accepted quantity of "Blotter Material" will be paid for at the contract unit price per ton or per cubic yard, as the case may be, as listed in the Proposal. The prices so-stated constitute full and complete compensation for all labor, materials, and equipment, and all incidentals required to finish the work, complete and accepted by the Engineer. SECTION 405 SEAL COAT 405.1 DESCRIPTION. This work consists of providing a surface treatment consisting of an application of bituminous material on a prepared gravel foundation, to be followed by an application of cover coat material, at the locations indicated on the Plans or as directed by the Engineer, all in accordance with these Specifications. 405.02 MATERIALS. 405.02.1 Bituminous Material. Bituminous material used as a seal coat may be any of those enumerated in Subsection M.03.03 of these Specifications. The specific material to be used will be specified in the Contract. The grade may be changed by the Engineer during construction at no change in the unit price. 405.02.2 Cover Coat Material. Cover coat material shall meet the requirements of Subsection

405.04 Method of Measurement.

405.04.1 Bituminous Material. "Seal Coat" will be measured by the number of square yards

actually applied in accordance with the Plans and/or as directed by the Engineer. 405.04.2 Cover Coat Material. "Cover Coat Material" will be measured by either the number of tons or the number of cubic yards, as the case may be, actually applied in accordance with the Plans and/or as directed by the Engineer. 405.05 BASIS OF PAYMENT. 405.05.1 Seal Coat. The accepted quantity of "Seal Coat" will be paid for at the contract unit price per square yard as listed in the Proposal. 405.05.2 Cover Coat Material. The accepted quantity of "Cover Coat Material" will be paid for at the contract unit price per ton or per cubic yard, as the case may be, as listed in the Proposal. The prices so-stated constitute full and complete compensation for all labor, materials, and equipment, and all incidentals required to finish the work, complete and accepted by the Engineer. SECTION 406 COLD RECYCLED BASE COURSE (PAVEMENT REHABILITATION/RECYCLING) 406.01 DESCRIPTION. This work consists of the rehabilitation of an existing pavement structure into a processed asphalt stabilized base (recycled) course. The existing pavement is to be mixed with a specified depth of the existing gravel base. This mixture of pavement and gravel is to be processed, reshaped, rolled, compacted and fine graded to the cross sections and/or grades indicated on the Plans, all in accordance with these Specifications. 406.01.1 Remaining Gravel Base. The remaining gravel base and/or subgrade may be modified to properly accommodate the processed asphalt stabilized base course. Any modifications of this nature, if required, such as, but not limited to, the excavation and replacement of unsuitable materials and trimming and fine grading will be accomplished under separate bid items. Any 4−33movement of the existing recyclable materials to allow for these modifications is included in this bid item. 406.02 MATERIALS. The processed asphalt stabilized base material shall conform to the gradation requirements of either Gradation "A" or Gradation "B,” whichever is specified in the Contract. Gradation "A" Gradation "B" Sieve Designation % Passing by Weight % Passing by Weight 3" 100 100 2½" 80-100 100 1½" 70-100 70-100 3/4" 50-85 50-95 NO. 4 30-55 30-75 NO. 50 8-24 8-30 NO. 200 2-12 3-12 If additional aggregate is needed, the Contractor may be directed to add material from an outside source. However, scarified pavement and gravel fines must be mixed together and thoroughly worked and/or reworked as described herein. Additional gravel shall conform to the requirements for Gravel Borrow as set forth in Subsection M.01.09, Table I, Column I , of these Specifications.

406.03 Construction Methods.

406.03.1 Equipment. The Contractor has the option to utilize whatever equipment can effectively

pulverize, crush, mix and/or blend the recyclable materials to specification. Furthermore, the Contractor can either choose to process in-place or load and haul the recyclable materials to an off-site location, process them into the proper recycled material and return it to the job site.

406.03.2 Procedure. Prior to the start of Pavement "Rehabilitation/Recycling" all water and gas

gates are to be lowered to a minimum depth of one foot from proposed finish grade. All manholes and catch basin frames, grates and covers are to be removed. The structures are to be covered with a temporary cover which shall overhang the pavement opening by a minimum of one foot on all sides of adequate strength to accommodate truck and construction equipment loadings. The voids remaining after utility gates or drainage structures are lowered are to be filled with gravel borrow material conforming to the requirements of Table I, Column I of Subsection M.01.09 of these Specifications. The existing pavement is to be sca rified and mixed with gravel from the roadway structure. The minimum depth of existing gravel to be inco rporated in the rehabilitation process will be shown on the Plans. This quantity will be taken from the uppermost portion of the base layer unless otherwise specified. Water and calcium shall be added to insure optimum moisture content at the time of compaction. They shall be applied at the rate of 0.25 pounds of calcium chloride per gallon of water per square yard of recycled pavement area. The mixing formula may be modified by the Engineer to compensate for temperature, humidity, weather and/or density determinations. 4−34 Any required modifications to the remaining gravel base and/or subgrade such as but not limited to cuts, fills, grade realignment and the removal of unsuitable materials will be made before spreading the asphalt stabilized base material. Existing utility gates, manholes and catch basins are to be adjusted to finish grade. The thickness of the processed asphalt stabilized (recycled) base course will be shown on the Plans, graded to the specified cross section, plan grades or as directed by the Engineer and compacted to a uniform density of not less than 95 percent of maximum density as determined by AASHTO T180, Method D. The restored cross section shall be thoroughly compacted to a dense consolidated mass by rolling with an approved roller capable of producing the specified density. The required density will be measured by a Nuclear Density Gauge. The processed asphalt stabilized base shall be tested for smoothness and accuracy of grade and if any portions are found to lack required smoothness or accuracy such portions shall be re-scarified, reshaped, recompacted, and otherwise manipulated as the Engineer may direct until the required smoothness and accuracy are obtained. The finished surface shall have a tolerance of ½ inch plus or minus to the grades shown on the Plans or as directed. It is the responsibility of the Contractor to ensure that the equipment/construction methods he intends to use are capable of complying with project specifications. 406.04 METHOD OF MEASUREMENT. "Cold Recycled Base Course" will be measured by the number of square yards of material actually plac ed in accordance with the Plans and/or as directed by the Engineer. 406.05 BASIS OF PAYMENT. The accepted quantity of "Cold Recycled Base Course" will be paid for at the contract unit price per square yard as listed in the Proposal. The price so-stated constitutes full and complete compensation for all labor, equipment, and materials, including scarifying, mixing, pulverizing, spreading, reshaping, regrading, rolling, compacting, fine grading, any loading, hauling or other handling of recyclable materials, all costs incurred resulting from the Contractor's choice to process materials off-site, costs resulting from moving processed materials to allow for modifications to the remaining gravel base and/or subgrade, the removal and disposal of unsuitable materials, the movement of surplus asphalt stabilized base material from one location to another within the project limits, all material, placement and subsequent removal of temporary covers and structures, and all incidentals required to finish the work, complete and accepted by the Engineer. 406.05.1 Other Operations and Materials. The following work operations and materials may be necessary to properly complete the work as spec ified above. When required, they will be measured and compensated for under appropriate bid items as follows:

407.01 DESCRIPTION. This Specification provides the Contractor with the option of recycling

reclaimed asphalt pavement (RAP) into the composition of the following mixes or applications.

407.02 MATERIALS. Reclaimed Asphalt Pavement (RAP) shall consist of asphalt pavement

recovered by cold milling or other removal techniques approved by the Engineer. New aggregate and asphalt cement shall be added to meet the required composition. 407.02.1 Composition of Mixtures. No more than 30 percent RAP will be allowed in the bituminous mixture. The recycled mixture of RAP, new aggregate and added asphalt cement shall meet the requirements specified in Subsection M.03.01; Bituminous Concrete Pavements , for aggregate gradation and asphalt cement content. AASHTO TP2 shall be used for extracting and recovering the binder from the RAP. The added asphalt cement grade shall be selected so that the requirements for PG 64-28 specified in Subsection M.03.02.1; Performance Graded Asphalt Cement, shall be met.