SECTION 836 - DURABLE PREFORMED PAVEMENT MARKINGS TYPE I TAPE
836.01 GENERAL. Use preformed pavement marking material consisting of white or
yellow films with retroreflective optics incorporated to provide immediate and continuing retroreflection. Use preformed pavement marking material capable of adhering to new dense and open graded asphalt surfaces, during the paving operation, or portland cement concrete by a pre- coated pressure sensitive adhesive. The Engineer may require a primer to precondition the pavement surface. Ensure that the markings conform to pavement contours by the action of traffic. Ensure that, after application, the markings are immediately ready for traffic. Ensure that these markings provide long term reflectivity, as determined in the following performance requirements, when applied according to the manufacturer’s instructions. Ensure that the preformed markings are suitable for use one year after the date of receipt when stored according to the manufacturer’s recommendations.
836.02 Requirements.
836.02.01 Composition. U se retroreflective preformed pavement markings
consisting of a mixture of high quality polymeric materials, pigments, and retroreflective optics distributed throughout its base cross sectional area.
836.02.02 Reflectance. Ensure that the whi te and yellow markings have the
following minimum reflectance values as measured according to the testing procedures of ASTME 1701. Measure the coefficient of retr oreflective luminance and express the value as millicandelas per square meter per lux [(mcd/m2)lx-1]. MINIMUM REFLECTANCE Color Entranc e Observatio n Minimum Reflectance Angle Angle White 88.76º 1.05º 500 minimum Yellow 88.76º 1.05º 500 minimum
836.02.03 Skid Resistance. Ensure that the surface of the retroreflective
material provides an initial minimum skid resistance value of 45 BPN when tested according to ASTM E 303.
836.02.04 Patchability. Ensure that the pavement marking material is capable
of use for patching worn areas of the sa me type according to the manufacturer’s recommendations.
836.02.05 Material Quality. Replace any material used as longitudinal or
intersection markings that fails minimum reflecti vity values or fails due to loss of adhesion or complete wear through. Minimum replacement zone is 300 feet of roadway length or one intersection marking.
836.03 APPROVAL. The Department will approve Type I pavement marking tape based
on conformance to KM 64-207 and this section. 836-1
836.04 CERTFICATION. Submit manufacturer’s certification stating conformance to
the requirements of this section for each shipment of approved Type I pavement marking tape for use on projects. Clearly state the ma nufacturer, product name and product code and color as listed in the Department’s List of Approved Materials. Identify the lot number(s), expiration date, and quantity delivered.
836.05 ACCEPTANCE. The Department will accept Type I pavement marking tape
based on verification of inclusion on the Department’s List of Approved Materials, compliance of the manufacturer’s certification, and visual inspection of the installation of the Type I pavement marking tape. 836-2 SECTION 837 - EXTRUDED THERMOPLASTIC PAVEMENT MARKING MATERIALS
837.01 GENERAL. This section covers extruded thermoplastic pavement marking
materials for permanent applications.
837.02 DROP ON BEADS. Use beads that will ensure the pavement marking material
will meet retroreflectivity requirements. The Department will evaluate the beads as part of the marking system through retroreflectivity readings.
837.03 APPROVAL. Select materials that conform to the composition and physical
characteristic requirements below when evaluated in accordance with AASHTO T-250 or other test methods as cited. The Department will sample and evaluate for approval each lot of thermoplastic material delivered for use per contract prior to installation of the thermoplastic material. Do not allow the installation of thermoplastic material until it has been approved by the Division of Materials. Allow the Department a minimum of 10 working days to evaluate and approve thermoplastic material from the date received by the Division of Materials.
837.03.01 Composition. Use a maleic-modified glycerol ester resin (alkyd binder) to
formulate the thermoplastic material. Ensure the pigment, pre-mix beads, and filler are uniformly dispersed in the resin. Use material that is free from all dirt and foreign material. Annually provide independent analysis data and certification for each formulation stating the total concentration of each heavy metal present, the test method used for each determination, and compliance to 40 CFR 261 for leachable heavy metals content. COMPOSITION (Percenta ge by Wei ght) Com ponent White Yellow Binder, (1) 18.0 min. 18.0 min. Glass Beads (Premixed ) 30 - 40 30 - 40 Titanium Dioxide 10.0 min. — Calcium Carbonate & Inert Fillers (2) 42.0 max. 50.0 max. Heavy Metals Content Comply with 40 CFR 261 Comply with 40 CFR 261 (1)Use a binder that consists of a mixture of synthetic resins, at least one being solid at room temperature, and high boiling point plasticizers. Ensure that at least one-third of the binder composition is solid maleic-modified glycerol ester resin and is not less than 8 percent by weight of the entire material formulation. Do not use alkyd binder that contains petroleum based hydrocarbon resins. (2)The manufacturer may choose the amount of calcium carbonate and inert fillers, providing all other requirements of this section are met.
837.03.02 Physical Characteristics. For thermoplastic material heated for 4 hours
at 425ºF under agitation, conform to the following requirements.
A.Color . As determined with a spectrophotometer using D65 illuminant with a 45 degree entrance angle and 0 degree observation angle geometry. 837-1
Source: Kentucky Standard Specifications for Road and Bridge Construction, 2019 Edition. Pages 665–666 of 718.