1、Standard Specification for Waterborne White and Yellow Traffic Paints AASHTO Designation: MP 24-15 (2016)1 Release: Group 2 (June 2016) American Association of State Highway and Transportation Officials 444 North Capitol Street N.W., Suite 249 Washington, D.C. 20001 TS-4c MP 24-1 AASHTO Standard Spe
2、cification for Waterborne White and Yellow Traffic Paints AASHTO Designation: MP 24-15 (2016)1Release: Group 2 (June 2016) 1. SCOPE 1.1. This specification covers fast-drying waterborne traffic line paints for use on asphalt and cement concrete pavements. Waterborne traffic lines applied to roadways
3、 shall be installed using glass spheres or other optics by gravity or pressurized equipment for enhanced retroreflectivity and color during daytime and nighttime conditions. 1.2. This standard practice may involve hazardous materials, operations, and equipment. It does not purport to address all saf
4、ety problems associated with its use. It is the responsibility of the user of this standard practice to establish the appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 2. REFERENCED DOCUMENTS 2.1. ASTM Standards: D562, Standard Test Metho
5、d for Consistency of Paints Measuring Krebs Unit (KU) Viscosity Using a Stormer-Type Viscometer D711, Standard Test Method for No-Pick-Up Time of Traffic Paint D713, Standard Practice for Conducting Road Service Tests on Fluid Traffic Marking Materials D869, Standard Test Method for Evaluating Degre
6、e of Settling of Paint D1475, Standard Test Method for Density of Liquid Coatings, Inks, and Related Products D2369, Standard Test Method for Volatile Content of Coatings D2805, Standard Test Method for Hiding Power of Paints by Reflectometry D3723, Standard Test Method for Pigment Content of Water-
7、Emulsion Paints by Low-Temperature Ashing D7539, Standard Practice for Using a Test Chamber for Humidity Conditioning of Test Panels of Pavement Marking Paints E313, Standard Practice for Calculating Yellowness and Whiteness Indices from Instrumentally Measured Color Coordinates E1349, Standard Test
8、 Method for Reflectance Factor and Color by Spectrophotometry Using Bidirectional (45:0 or 0:45) Geometry E1710, Standard Test Method for Measurement of Retroreflective Pavement Marking Materials with CEN-Prescribed Geometry Using a Portable Retroreflectometer 2.2. Other Document: 40 CFR, Volume 27,
9、 261.24, Toxicity Characteristic 2016 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.TS-4c MP 24-2 AASHTO 3. PRODUCT REQUIREMENTS 3.1. GeneralTraffic paint shall consist of a ready-mixed pigmented binder in
10、 a one-package system. Traffic paint shall be suitable for application on both asphalt concrete and cement concrete pavements at a wet film thickness of 15 mils (0.015 in.). 3.2. PigmentsSuppliers may use any pigment, provided it does not contain an y of the metals listed in the Environmental Protec
11、tion Agency Code of Federal Regulation 40, Section 261.24, in excess of the allowed maximum limits. 3.3. CompositionThe manufacturer may use any combination of ingredients, provi ded the finished paint satisfies the requirements herein. Sufficient quantities of dispersing, suspending, and anti-skinn
12、ing agents shall be used to ensure proper manufacture and stability in containers during storage. 3.4. NTPEP EvaluationIf specified by the purchasing agency, the supplier shall subm it products to the AASHTO National Product Evaluation Program (NTPEP) Pavement Marking Program for field evaluation an
13、d laboratory analysis of products. 3.5. Paint RequirementsThe paint shall meet the requirements specified in Table 1. Table 1Paint Requirements Characteristics Requirement ASTM Reference Paragraph Viscosity, KU 8095 D562 Weight per gal, lbaRange is based on the target value plus the tolerance for QC
14、/QA of 2.0% (of the target value) D1475 Nonvolatile content, %aRange is based on the target value plus the tolerance for QC/QA of 5.0% (of the target value) D2369 Pigment content, %aRange is based on the target value plus the tolerance for QC/QA of 5.0% (of the target value) D3723 Contrast ratio 15
15、wet mil thickness 0.98 min D2805 Contrast ratioGrade A 5 wet mil thickness (only when specified by user) 0.96 min D2805 Contrast ratioGrade B 5 wet mil thickness (only when specified by user) D2805 White Yellow 0.90 min 0.85 min Initial color, chromaticity coordinates Table 2 E1349 5.2 Daytime Lumin
16、ance Factor, Y (%) E1349 5.2 White Yellow 75 min 45 min Yellowness Index, white 0.12 max E313 5.2 Condition in container, rating 8 min D869 5.3 Skinning Passes 5.4 Heat stability, KU 5 KU of initial viscosity 5.5 Freezethaw stability, KU 5 KU of initial viscosity 5.6 No-track time (field), s 90 max
17、5.7 No-track time (lab), min As specified by user 5.8 Identification testing (x-ray analysis, gas chromatography, infrared and/or ultraviolet spectral analysis) As specified by the user 5.9 aTarget values and applicable range to be used in quality control/quality assurance (QC/QA) shall be establish
18、ed by the user upon qualification of the paint, based on the originally approved product evaluated by NTPEP. The applicable range is then specified by using the target value and applying the appropriate tolerance to this value. 2016 by the American Association of State Highway and Transportation Off
19、icials. All rights reserved. Duplication is a violation of applicable law.TS-4c MP 24-3 AASHTO 3.6. ColorThe initial color of the unbeaded paint shall satisfy the appr opriate chromaticity coordinates indicated in Table 2. Table 2Chromaticity Coordinates 1 2 3 4 Color x y x y x y x y White 0.355 0.3
20、55 0.305 0.305 0.285 0.325 0.335 0.375 Yellow 0.510 0.490 0.473 0.453 0.490 0.432 0.537 0.462 4. PERFORMANCE REQUIREMENTS (NTPEP TEST DECKS) 4.1. Retroreflectivity: 4.1.1. The minimum initial retroreflectivity of beaded lines shall be 250 mcd/m2/lux for white and 165 mcd/m2/lux for yellow when teste
21、d in accordance with ASTM E1710. 4.1.2. The minimum retroreflectivity of beaded lines after 12 months of exposure on the National Transportation Product Evaluation Program (NTPEP) test deck shall be 150 mcd/m2/lux for white and 100 mcd/m2/lux for yellow. Readings shall be made adjacent to the center
22、line or lane line (outside the normal travel path of vehicles). Note 1The user may review the retro reflectivity results of each NTPEP test deck to determine the minimum value in effect for that deck, in order to approve only the better-performing materials and to ensure competition in the bidding p
23、rocess after 12 months. 4.2. DurabilityA minimum durability rating of “ 7” in the skip line area and “6” in the wheelpaths after 12 months. The rating system used will be as indicated by NTPEP procedures. Durability readings will be evaluated subjectively on a scale of “0” to “10,” where “0” means t
24、hat the marking does not exist, “10” means that the marking is completely intact, and intermediate values mean that the marking is partially present (e.g., “5” means that the marking is 50 percent present). 5. TESTING 5.1. Test MethodsThe tests shall be conducted in accordance with ASTM standards, e
25、xcept as otherwise specified (see Table 1). 5.2. Color, Daytime Luminance Factor, and Yellowness Index: 5.2.1. The color and daytime luminance factor, Y (%) when applied at a wet film thickness of 15 mils to a white paper substrate, shall be obtained at 45/0 geometry using the 1931 CIE 2 standard ob
26、server and illuminant D65. 5.2.2. The initial color of the unbeaded paint shall satisfy the appropriate chromaticity coordinates indicated in Table 2 and Daytime Luminance Factor, Y (%) when tested in accordance with ASTM E1349. 5.2.3. The yellowness index of the white paint shall be tested in accor
27、dance with ASTM E313. 2016 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.TS-4c MP 24-4 AASHTO 5.3. Condition in Containers: 5.3.1. The paint shall show no curdling, livering, caking, lumps, skins, or color
28、 separation. Any settling that has occurred in containers opened within 45 days after receipt must be able to be mixed to a smooth homogeneous state within 5 min. 5.3.2. This requirement applies both to test samples that are mixed with spatulas and to paint in 275-gal intermediate bulk containers th
29、at are mixed with air-driven industrial mixers. 5.4. SkinningThe paint shall not skin within 48 h in a three-quarter-filled, tightly closed quart container. 5.5. Heat Stability: 5.5.1. Put 450 mL of paint in a 473-mL (1-pt) lined container, close the container, seal it with tape, and put it in an ov
30、en maintained at 60 1C for 1 week. 5.5.2. Equilibrate the paint at 25 1C and mix thoroughly with gentle stirring. 5.5.3. Perform the consistency test as specified in ASTM D562. 5.5.4. Consistency shall not vary more than 5 KU from the initial viscosity. 5.6. FreezeThaw Stability: 5.6.1. Put 450 mL o
31、f paint in a 473-mL (1-pt) lined container; close the container, invert, and place in a chamber maintained at 10 1C. 5.6.2. Remove the container after 16 h and maintain at 25 1C for 8 h. 5.6.3. Repeat this procedure four more times. 5.6.4. At the completion of the freezethaw cycles, equilibrate the
32、paint at 25 1C, mix thoroughly with gentle stirring, and examine for smoothness and uniformity. 5.6.5. Repeat the consistency tests as specified in ASTM D562. 5.6.6. Consistency shall not vary more than 5 KU. 5.6.7. The paint shall show no evidence of coagulation or breaking of the emulsion. 5.7. No
33、-Track Time (Field): 5.7.1. The reflectorized line, when applied at 15 1 mil wet film thickness with glass spheres applied at a rate of 6 lb/gal of paint, shall have a no-track time of 90 s or less with a maximum paint temperature at the guns of 54C. 5.7.2. The maximum no-track time shall not be exc
34、eeded when the pavement temperature is between 10C and 50C with the relative humidity less than 70 percent and the pavement is dry. 5.7.3. The no-track time shall be determined by passing over an applied test line at approximately 30 degrees with a standard size passenger car or pickup truck. 5.7.4.
35、 A line showing no visual deposition of the paint to the pavement surface when viewed from a distance of 15.2 m (50 ft) shall be considered as conforming to the dry-time requirements. 2016 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is
36、a violation of applicable law.TS-4c MP 24-5 AASHTO 5.8. Alternate No-Track Time (Lab): 5.8.1. Fill the bottom of a Paul N. Gardner Co. test chamber, Model WEHTAB176 or equivalent, with 6 to 12 mm of water. 5.8.2. Close all ports and the door to allow equilibrating overnight. 5.8.3. By carefully open
37、ing and closing the ports, establish a relative humidity of 90 3 percent inside the chamber. 5.8.4. Record temperatures and relative humidity inside and outside the chamber. 5.8.5. On clean glass, draw down two test panels of 15-mil wet film thickness using a drawdown blade. 5.8.6. Promptly place th
38、e wet films in the test chamber and maintain the relative humidity of 90 3 percent. 5.8.7. Touch the films at 15-min intervals until the finger does not pick up wet paint. Then begin dry-through testing outside the chamber at 15-min intervals. 5.8.8. The film is dry through if it does not distort fr
39、om a 90-degree thumb twist without pressure on the film. 5.8.9. Record temperatures, relative humidity, and times. Measure the dry thickness of the paint. Note 2It is recommended that a control or standard paint be tested every day that dry-through time tests are conducted. Note 3This method is base
40、d upon ASTM D7539, Standard Practice for Us ing a Test Chamber for Humidity Conditioning of Test Panels of Pavement Marking Paints. Note that as per 8.1.4 there are best conditions for humidity and temperature as target environmental conditions. Understand that potential variations in the testing en
41、vironment will introduce significant variations in the testing results. 5.9. Identification Testing: 5.9.1. The purchaser may utilize x-ray analysis, gas chromatography, infrared, or ultraviolet spectral analysis of the paint or its components to detect modifications of original formulation. 5.9.2.
42、Evidence of adulteration or improper formulation shall be cause for rejection. 6. NTPEP TEST DECK EVALUATIONS 6.1. Manufacturers shall install test lines on both asphalt and cement concrete roadways on the NTPEP test deck in accordance with ASTM D713. Separate test lines shall be installed for each
43、color of each material. Pavement markings installed on asphalt and cement concrete roadway surfaces will be evaluated in accordance with the NTPEP Pavement Marking Materials work plan (which references ASTM D713) and approved separately for each type and color based on the Test Deck specifications o
44、f the user. 7. METHODS OF SAMPLING 7.1. The paint shall be sampled in accordance with the appropriate ASTM method. 2016 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.TS-4c MP 24-6 AASHTO 8. PACKAGING AND M
45、ARKING 8.1. The paint shall be delivered in such containers as may be specified in the contract. Each container shall bear a label with the following information shown thereon: name and address of manufacturer and contractor, shipping point, trade mark or trade name, waterborne paint, formula, numbe
46、r of liters (gallons), date of manufacture and lot number, title and number of this specification, and color of paint. 9. APPROVALS 9.1. At the end of 1 year, the agency will evaluate the results of laboratory and test deck data. This information will be reviewed for each material by color and roadw
47、ay surface to determine compliance with this specification. Approved paint formulas will remain active for a period of 4 years; afterwards the paint will need to be retested. 10. KEYWORDS 10.1. Pavement marking materials; traffic paint. 1This provisional standard was first published in 2014. 2016 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.
