339-1 Description.
Construct asphalt pavement in areas where vehicular traffic does not travel, such as pavement under guardrail, bicycle paths, median pavement, sidewalks, etc. Also, chemically treat the underlying soil to prevent plant growth.
339-2 Materials.
For the pavement, use any plant -mixed hot bituminous mixture meeting the requirements of a mix design verified by the Engineer, except do not use open -graded friction course (F C-5). For bicycle paths, use a mixture that produces a finished pavement which will not distort or mar under bicycle or mower wheel loads. In general, the Engineer will accept the mixture on the basis of visual inspection with no further testing required.
339-3 Foundation and Soil Treatment.
Shape the soil in areas where pavement is to be constructed, to a surface true to the lines, grades and typical sections shown in the Plans. Compact the soil to a firm state. Immediately before placing the pavement, uniformly apply a pre -emergent herbicide in accordance with the requirements of 7 -1.7, to the foundation soil. Ensure that the herbicide carries an approved label for use under paved surfaces, and that herbicide is applied in accordance with directions on the label. Prevent damage to any adjacent vegetation during herbicide application. Replace, at no expense to the Department, any plants damaged as the result of soil treatment outside designated areas.
339-4 Placing Mixture.
Uniformly place the hot bitum inous mixture by machine or hand methods at the rate of spread or dimensions indicated in the Plans or as otherwise directed by the Engineer. If posts are to be constructed within the pavement area, the Contractor may cut holes for installation through the completed pavement. After completing installation of posts and compaction of the backfill material, patch the area around each post with fresh hot bituminous mixture. If directed by the Engineer, place miscellaneous asphalt pavement prior to placement of the final surface course.
339-5 Compacting Mixture.
Uniformly compact the hot bituminous mixture with lightweight rollers or vibratory compactors as directed by the Engineer. The Contractor may use hand tamps for compaction in areas which are inaccessible to other compaction equipment. The Engineer will not require a specific density.
339-6 Surface Requirements.
Provide a finished surface that is reasonably smooth, of uniform texture, and shaped so as to drain without ponding of water. FY 2023-24 Return to Table of Contents Upon completion of the pavement, shape the surface of the adjacent earth to match the pavement edges.
339-7 Method of Measurement.
For the work specified under this Section (including the pertinent provisions of Sections 320 and 330), the quantity to be paid f or will be the weight of the mixture in tons. For each pay item, the pay quantity will be based on the quantity placed on the project, limited to 110% of the adjusted plan quantity for the pay item. The adjusted plan quantity will be determined by dividing the original plan quantity (including any Engineer approved quantity revisions) by the design G mm stated in 334 -1.4, then multiplying it by the tonnage -weighted average G mm of the mixes used on the project for the pay item. The plan quantity will be determined based on a spread rate of 100 pounds per square yard per inch of design thickness of asphalt placed over the area shown in the Plans. Prepare and submit a Certification of Quantities to the Engineer in accordance with
9-2.1 2.
339-8 Basis of Payment .
Price and payment will be full compensation for all work specified in this Section, including shaping and compacting the foundation, soil sterilization treatment, furnishing of the bituminous material used in the mixture, and shaping of adjacent earth s urfaces. Payment will be made under: Item No. 339 - 1- Miscellaneous Asphalt Pavement - per ton. FY 2023-24 Return to Table of Contents SECTION 341 ASPHALT MEMBRANE INTERLAYER
341-1 Description.
Construct an asphalt membrane interlayer composed of a separate application of asphalt binder covered with a single application of aggregate. Obtain asphalt binder from a plant that is currently on the Department’s Production Facility Listing. Producers se eking inclusion on the list shall meet the requirements of Section 916.
341-2 Materials.
341-2.1 Asphalt Binder: Use a PG 76 -22 meeting the requirements of Section 916 and
listed on the Department’s Approved Products List (APL).
341-2.2 Cover Material: Use Size No. 6 stone, slag, or gravel meeting the requirements
of Section 901.
341-3 Equipment.
341-3.1 Power Broom: Provide a power broom for cleaning the existing pavement
capable of removing all loose material from the surface.
341-3.2 Spreading Equipm ent: Provide a self -propelled aggregate spreader that can be
adjusted to accurately apply the cover material at the specified rate and that spreads the material uniformly.
341-3.3 Rollers: Provide self -propelled, pneumatic -tired traffic type rollers equip ped
with at least 7 smooth-tread, low -pressure tires, and capable of carrying a gross load of at least 8 tons. Maintain a minimum tire inflation pressure of 90 psi, or as specified by the manufacturer, such that in no two tires the air pressure varies more than 5 psi. Load the traffic roller as directed by the Engineer.
341-3.4 Mixing Equipment: Use mixing equipment for asphalt binder designed for that
purpose and capable of producing and maintaining a homogeneous mixture of asphalt cement at the specified temperature.
341-3.5 Pressure Distributor: Use a pressure type distributor to apply asphalt binder
capable of maintaining a homogeneous mixture of asphalt cement at the specified temperature and consistently apply the material in a uniform manner.
341-4 Contractor’s Quality Control.
Provide the necessary quality control of the asphalt binder, and interlayer construction in accordance with the Contract requirements. If the rate of application varies by more than 5% from the rate set by the Engineer in acc ordance with 341 -6, immediately make all corrections necessary to bring the spread rate into the acceptable range. The Engineer may take additional measurements at any time. The Engineer will randomly check the Contractor’s measurement to verify the spread rate.
341-5 Construction Procedure.
341-5.1 Preparation of Surface: Prior to application of the asphalt binder, clean the
existing pavement as specified in 300 -5.
341-5.2 Application of Asphalt Binder: Apply the asphalt binder only under the
following c onditions:
1.The air temperature is above 50ºF and rising. FY 2023-24 Return to Table of Contents
Source: Florida Standard Specifications for Road and Bridge Construction, 2024 Edition. Pages 338–339 of 1,299.