654.1 General Description
This work includes furnishing and placing raised pavement markers according to the plans or as directed by the Engineer. Use markers that conform to plan shapes, dimensions, and tolerances.
654.1.01 Definitions
General Provisions 101 through 150.
654.1.02 Related References
A. Standard Specifications Section 868—Bituminous Adhesive for Raised Pavement Markers Section 886—Epoxy Resin Adhesives Section 919—Raised Pavement Marker Materials B. Referenced Documents QPL 74
654.1.03 Submittals
General Provisions 101 through 150.
654.2 Materials
Ensure that materials meet the requirements of the following specifications: Material Section Bituminous Adhesive 868 Epoxy Resin Adhesives 886 Pavement Markers 919
654.2.01 Delivery, Storage, and Handling
General Provisions 101 through 150.
654.3 Construction Requirements
654.3.01 Personnel
General Provisions 101 through 150.
654.3.02 Equipment
Before beginning construction, clean marker replacement equipment and ensure that it is mechanically sound. A. Containers and Stirring Devices Clean containers and stirring devices (paddles, propellers for drills, etc.) before hand-mixing epoxy. B. Automatic Mixing Device 1. Cleaning Clean the mixing head to the automatic epoxy mixing equipment after stopping work for any extended period of time. The length of down-time allowed depends on the pot life of the adhesive system being used. 2. Mixing Ratio Use an automatic mixing device that delivers separate components to the mixing head in a one-to-one ratio by volume. 3. Sample Valves Equip the lines feeding the mixing head with suitable valves to allow samples to be taken for checking the ratio of each component. C. Bituminous Adhesive Equipment Clean and maintain equipment for melting, stirring, and dispensing bituminous adhesive according to the bituminous adhesive manufacturer’s requirements.
654.3.03 Preparation
General Provisions 101 through 150.
654.3.04 Fabrication
General Provisions 101 through 150.
654.3.05 Construction
A. Adhesive Types Cement markers to pavement surfaces with a Type I-R Epoxy or Type I-S Epoxy (see Section 886), or with a bituminous adhesive (see Section 868). Space markers according to the plans. 1. Type I-R Epoxy. Use Type I-R Epoxy when the pavement temperature is above 50 °F (10 °C), or when traffic conditions require a rapid setting system. 2. Type I-S Epoxy. Use Type I-S Epoxy when the pavement temperature is above 60 °F (15 °C) and traffic conditions permit a slower setting system. 3. Bituminous Adhesive. Use bituminous adhesive when the pavement temperature is above 40 °F (4 °C) or when traffic conditions require a rapid setting material. B. Handling and Applying Adhesives Obtain an epoxy adhesive furnished as two separate components. Combine and use the components as follows: 1. Immediately before use, thoroughly stir the individual components with separate paddles. Reject material permanently increasing in viscosity or showing settling of pigments, filler, or thixotropic additives that cannot be readily redispersed. 2. After stirring or agitating the two separate components, mix them in a one-to-one ratio and blend thoroughly until obtaining a uniform color without streaks. 3. At time of mixing, ensure that the temperature of both components is 60 ° to 80 °F (15 ° to 27 °C). If necessary, heat components using indirect heat to avoid locally overheating and decomposing the material. Do not heat adhesive above 120 °F (49 °C). 4. Place markers between the start of mixing the epoxy system and the termination of the pot life. The Engineer will designate the allowable pot life based on environmental factors. Never use a partially set mixed system that does not readily extrude around the perimeter of the marker when pressed to the roadway. 5. When using an approved fast-setting epoxy system, mix the separate components with a two-component type automatic mixing and extrusion apparatus, and place markers immediately. 6. Use bituminous adhesive furnished in approximately 30 lb. (14 kg) cubes. a. Heat the cubes in an oil-jacketed melting pot. b. Maintain the bituminous adhesive at the manufacturer-recommended temperature during placement of the markers. c. Discard bituminous adhesive heated above 450 °F (232 °C). C. Placement of Markers 1. Surface Cleaning Clean pavement of dirt, curing compound, grease, oil, paint, moisture, loose or unsound layers, or other material that would impair the bond between the adhesive and the roadway. a. Use either sand-blasting or grinding equipment to clean. Remove the dust before placing the marker. b. Provide cleaning equipment air lines with suitable traps to prevent oil or moisture from being redeposited on the road surface. 2. Placement Limits Place markers as follows: a. Do not place markers over joints in rigid pavement. b. Do not place markers when pavement temperature is below 40 °F (4 °C). c. When possible, wait 60 to 90 days before placing markers using epoxy adhesive on newly constructed asphaltic concrete pavements. 3. Marker Placement Using Epoxy Adhesives Place markers using epoxy adhesives as follows: a. Place enough adhesive on the cleaned pavement or the bottom of the marker to completely cover the contact area of the marker. b. Press the marker firmly to the pavement. c. Allow a slight bead of epoxy adhesive to extrude from under the marker edges. d. Remove adhesive on the face of the marker or adhesive that obscures the marker. Do not use thinners or solvents to clean epoxy adhesives from the markers. 4. Marker Placement Using Bituminous Adhesives Place markers using bituminous adhesives as follows: a. Place enough bituminous adhesive on the cleaned pavement or the bottom of the marker to completely cover the contact area of the marker. b. Press the marker firmly to the pavement. c. Allow a slight bead of adhesive to extrude from under the marker edges. d. Remove adhesive on the face of the marker or adhesive that obscures the marker. e. Place the marker before the bituminous adhesive cools and does not extrude around the perimeter of the marker when pressed to the roadway.
654.3.06 Quality Acceptance
Refer to QPL 74 for raised pavement markers that have met these requirements.
654.3.07 Contractor Warranty and Maintenance
General Provisions 101 through 150.
654.4 Measurement
The number of each type of installed and accepted pavement marker is counted separately for payment.
654.4.01 Limits
General Provisions 101 through 150.
654.5 Payment
Raised pavement markers will be paid for at the Unit Price for each Unit of each type. Payment is full compensation for furnishing and installing each marker. When designated, payment will also include recessing the marker. Payment will be made under: Item No. 654 Raised pavement markers type_____ Per each Item No. 654 Raised pavement markers type_____(recessed) Per each
654.5.01 Adjustments
General Provisions 101 through 150.
Raised Pavement Markers in other states
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