REQUIREMENTS & ACCEPTANCE
DURABLE PAINT PAVEMENT MARKINGS
Durable paint pavement markings as described in Section 2527 of the Standard Specifications (including Pavement Markings, Epoxy) shall meet requirements of this IM. Approved Products are listed in the Materials Approved Products Listing Enterprise (MAPLE).
The marking material shall consist of a binder and retroreflective beads. Plural component epoxies are also allowed. The marking material shall have less than 150 g/l of volatile organic compounds (VOCs). The material shall be free of lead, chrome and other heavy metals as defined by the Environmental Protection Agency. Upon heating to application temperature, the material shall not exude fumes that are toxic or injurious to persons or property.
The brand names along with binders shall be pre-approved and listed within MAPLE. Preapproval shall be based on data taken from National Transportation Product Evaluation Program (NTPEP) test decks. The preferred test decks shall be located in states that receive a minimum yearly average of 30 inches of snow. Deck locations that are preferred include Minnesota, Pennsylvania and Wisconsin. If data from these decks are not available submit products to current NTPEP test deck for evaluation.
Markings shall meet the following minimum requirements. Values shall be averaged from the AC and PCC test decks.
Minimum 0.462 0.428
Maximum 0.501 0.455
The initial color Chromaticity limits shall comply to ASTM D 6628 for each respective color. The color shall be measured with a standard C illuminant using a two-degree observer and 45/0 geometry or as currently stated in ASTM D 6628.
See the NTPEP workplan for information on what and how tests will be performed.
In addition to meeting the NTPEP test deck requirements, new classes of pavement marking materials shall demonstrate the ability to successfully survive winter snowplow operations on Iowa highways.
The Manufacturer will submit Technical data sheets to the Departments Construction and Materials Bureau for review along with the NTPEP test data for any new products seeking to be placed into MAPLE. Conformance to minimum requirements above is required for placement into MAPLE.
PACKAGING & MARKING
The marking materials shall be shipped in containers that protect the material from spoiling or becoming unfit for use. The containers shall be plainly marked with the following:
· Manufacturer’s name
· Product name or number
· Lot or batch number
· Net weight or volume of material
· Date of manufacture
· Date of expiration
The Contractor shall supply the Engineer with a copy of the manufacturer’s recommendations for applying the marking material. The marking material shall be installed according to the manufacturer’s recommendations. Binder thickness shall be the same as applied on the NTPEP deck with a tolerance of ±10%. The bead / element application rate, bead gradation, and bead coating shall be at the discretion of the applicable specification and / or Manufacturer recommendation for the product being utilized. An appropriate bead package shall be used to consistently meet or exceed the minimum retro-reflectivity requirements. Beads / elements will meet IM 484 requirements and be from an approved bead / element manufacturer.
The contractor shall demonstrate to the engineer at the start of the project the ability to meet the initial retro-reflectivity requirements shown in Section 2527.02 D. 2.c of the standard specifications.
Do not utilize expired paint without written permission from the manufacturer. Written permission shall be provided to the engineer prior to usage.
SAMPLING & ACCEPTANCE
The material manufacturer shall furnish a certification that the material supplied is identical in formulation to one of the pre-approved materials listed within MAPLE. The manufacturer shall reference the product according to the NTPEP lab number. The Product name within NTPEP will match the approved product name in MAPLE. It is the manufacturers responsibility to inform the department of product name changes or material changes to any of the products within MAPLE. Product changes will require re-submittal to NTPEP for review and testing as per the NTPEP workplan.
The Engineer maintains the right to take field samples to verify material identity.