AASHTO M 248-1991 Standard Specification for Ready-Mixed White and Yellow Traffic Paints《现拌白色和黄色交通涂料的标准规范》.pdf

《AASHTO M 248-1991 Standard Specification for Ready-Mixed White and Yellow Traffic Paints《现拌白色和黄色交通涂料的标准规范》.pdf》由会员分享，可在线阅读，更多相关《AASHTO M 248-1991 Standard Specification for Ready-Mixed White and Yellow Traffic Paints《现拌白色和黄色交通涂料的标准规范》.pdf（6页珍藏版）》请在麦多课文档分享上搜索。

1、 TS-4c M 248-1 AASHTO Standard Specification for Ready-Mixed White and Yellow Traffic Paints AASHTO Designation: M 248-91 (2012) 1. SCOPE 1.1. This specification covers alkyd resin type, ready-mixed white and yellow traffic paints for use on bituminous and portland cement concrete pavements. 1.2. In

2、tended use of the traffic paint. 1.2.1. These paints may be reflectorized for night visibility by adding reflective spheres before the paint film dries or sets, using the drop-on or pressurized methods. Generally, the reflective spheres are evenly dispersed to a wet film of 0.38 mm (15 mils) at a ra

3、te of 600 to 720 kg/m (5 to 6 lb/gal) of paint. The amount may be altered by the purchaser. 1.3. Types: 1.3.1. Type S Traffic PaintThis type is a slow drying paint that shall be used in areas where coning is acceptable for 1 h or more. 1.3.2. Type N Traffic PaintThis type has immediate drying proper

4、ties and shall be used in areas where coning of roadway is acceptable for 15 to 30 min. 1.3.3. Type F Traffic PaintThis type shall be used where faster drying time is required with a minimum of coning. With good drying conditions, this paint should dry in 3 to 6 min if heated to 51.5 2.5C (125 5F) i

5、n the applicator. 1.4. The values stated in SI units are to be regarded as the standard. Note 1It is advisable to consult local air pollution regulations regarding solvents prior to selecting the type of paint to be used. 2. REFERENCED DOCUMENTS 2.1. ASTM Standards: D 79, Standard Specification for

6、Zinc Oxide Pigments D 211, Standard Specification for Chrome Yellow and Chrome Orange Pigments D 362, Specification for Industrial Grade Toluene (Withdrawn 1989) D 476, Standard Classification for Dry Pigmentary Titanium Dioxide Products D 600, Standard Specification for Liquid Paint Driers D 605, S

7、tandard Specification for Magnesium Silicate Pigment (Talc) D 711, Standard Test Method for No-Pick-Up Time of Traffic Paint 2013 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-4c M 248-2 AASHTO D 740, St

8、andard Specification for Methyl Ethyl Ketone D 1199, Standard Specification for Calcium Carbonate Pigments 2.2. Federal Standards: TT-N-95 Naphtha, Aliphatic Fed. Std. No. 595, Colors Used in Government Procurement Fed. Std. No. 141, Paint, Varnish, Lacquer, and Related Materials: Methods of Inspect

9、ion, Sampling and Testing 2.3. Military Standard: MIL-C-429, Chlorinated Paraffin, Technical 3. CLASSIFICATION 3.1. TypesReady-mixed alkyd resin type paint covered by this specification shall be furnished in the following types, as specified in the invitation for bids, contracts, or order: 3.1.1. Ty

10、pe SMedium oil soya-modified alkyd resin. Primary solvent is VM chlorinated rubber, 4 to 1. Primary solvent is toluene. 3.1.3. Type FMedium oil soya/linseed alkyd resin; chlorinated rubber; chlorinated paraffin; 1.03 to 1.30 to 1.00. Primary solvent is MEK. 4. MATERIALS 4.1. The materials used in ma

11、nufacture shall conform to the requirements of the following specifications: 4.1.1. Lead ChromateASTM D 211, Type III. 4.1.2. Titanium DioxideASTM D 476, Type III Rutile (T1O2 80 percent purity, minimum). 4.1.3. Calcium CarbonateASTM D 1199, Type GC-II. 4.1.4. Magnesium SilicateASTM D 605. 4.1.5. Zi

12、nc OxideASTM D 79. 4.1.6. Alkyd Resin Solution Type SThe resin shall be supplied as a 60 mass percent solution in VM&P Naphtha. The resin solids shall be a medium oil soya-modified resin. No rosin shall be permitted. The oil fatty acids shall be either alkali refined soya oil or fatty acids of soya

13、oil having an iodine number of 115 to 130. No recovered oil, marine, or soya food fatty acid derivatives shall be used. The resin shall comply with the requirements in Table 1. 2013 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violat

14、ion of applicable law.TS-4c M 248-3 AASHTO Table 1Characteristics of Alkyd Resin Solutions Characteristics Alkyd Resin Type S Alkyd Resin Type N Alkyd Resin Type F Solids, mass percent 60 1 60 1 60 1 Phthalic acid, mass percent 30 min 30 min 3337 Oil acid, mass percent 50 min 54 min 4855 Iodine no.

15、115130 115130 115 min Color, Gardner, (max) 9 9 9 Acid number, (max) 8 8 8 Viscosity: Reduced to 45 mass percent solids D to H D to H D to G 4.1.7. Alkyd Resin Type NThe resin shall be supplied as a 60 mass percent solution in toluene. The resin solids shall be a medium oil soya-modified pentaetythr

16、itol resin. No rosin shall be permitted. The oil fatty acids shall be either alkali-refined soya oil or the fatty acids of soya oil having an iodine number of 115 to 130. No recovered oil, marine, or soya food fatty acid derivatives shall be used. The resin shall comply with the requirements in Tabl

17、e 1. 4.1.8. Alkyd Resin Type FThe resin shall be supplied at 60 mass percent solids in VM&P Naphtha. The resin solids shall be either alkali-refined soya oil or linseed oil or a mixture of the two, having an iodine number of 115 minimum. 4.1.8.1. The solution must tolerate a 500 mass percent dilutio

18、n with VM&P Naphtha. A solution containing 100 g of 20 MPas (20 cP) chlorinated rubber, 130 g of resin solution, and 290 g of methyl ethyl ketone shall be clear, transparent, and show no separation after 24 h of storage at 27 3C (80 5F) in a three-quarters-full test tube. 4.1.8.2. The alkyd resin, r

19、educed to 45 percent solids with VM&P Naphtha, shall have a viscosity of D to G. The resin shall comply with the requirements in Table 1. 4.1.9. Chlorinated RubberThe rubber shall have a fixed chlorine content of 65.0 percent minimum when previously dried at 100 5C (212 9F) for 24 h. 4.1.9.1. A 20 m

20、ass percent solution in toluene shall have a maximum color of 4 (Gardner) and a Brookfield viscosity of 9 to 25 MPas (9 to 25 cP). 4.1.10. Chlorinated ParaffinMIL-C-429A. 4.1.11. VM&P NaphthaTT-N-95. 4.1.12. TolueneASTM D 362. 4.1.13. Methyl Ethyl KetoneASTM D 740. 4.1.14. DriersASTM D 600 Class B.

21、4.1.15. Suspending AgentOrgano Montmorillonite. 4.1.16. Chlorinated Rubber Stabilizer for Types N and F PaintEpichlorohydrin or propylene oxide. 2013 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-4c M 24

22、8-4 AASHTO 5. REQUIREMENTS 5.1. ColorThe yellow paint shall match color chip No. 33538 of Fed. Std. No. 595a. 5.2. PigmentThe pigment used in the formulation of the paint shall conform to Tables 2 and 3 for the respective types and color. 5.2.1. The extracted pigment upon analysis shall conform to t

23、he quantitative requirements of Tables 2 and 3 for the respective types. 5.3. VehiclesAll vehicles shall be free from rosin and rosin derivatives. The component parts of the vehicle used shall be as indicated in Table 4 for the respective types. Table 2Composition of Pigment White Traffic Paint Pigm

24、ent Ingredients Mass, Percent Type S Type N Type F Min. Max. Min. Max. Min. Max. Titanium dioxide 29 31 29 31 34.0 36.0 Calcium carbonate 34 36 34 36 25.0 27.0 Magnesium silicate 34 36 34 36 30.0 32.0 Zinc oxide 8.0 10.0 Table 3Composition of Pigment Yellow Traffic Paint Pigment Ingredients Mass, Pe

25、rcent Type S Type N Type F Min. Max. Min. Max. Min. Max. Lead chromate 33.0 36.0 34.0 36.0 34.0 36.0 Magnesium silicate 30.0 33.0 11.0 13.0 11.0 13.0 Calcium carbonate 35.0 38.0 53.0 55.0 53.0 55.0 Table 4Composition of Nonvolatile Vehicle White and Yellow Traffic Paint Vehicle Ingredients Mass, Per

26、cent Type S Type N Type F Min. Max. Min. Max. Min. Max. Alkyd resin solids 100 79 81 30 32 Chlorinated rubber 19 21 38 40 Chlorinated paraffin 29 31 5.3.1. Types N and F shall contain 2 percent stabilizer based on the mass of chlorinated rubber. 5.4. Quantitative Requirements for the PaintThe paint

27、shall meet the requirements specified in Tables 5 and 6 for the respective types and colors. 2013 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-4c M 248-5 AASHTO Table 5Quantitative Requirements of White

28、 Paint Characteristics Requirements Type S Type N Type F Min. Max. Min. Max. Min. Max. Pigment, percent 61.0 63.0 57.0 59.0 48.0 50.0 Total solids, percent 77.0 75.0 69.5 Nonvolatile vehicle, percent, by mass of vehicle 42.0 41.0 41.0 Density, kg/m3 (lb/gal) 1510 (12.6) 1582 (13.2) 1426 (11.9) Visco

29、sity, Krebs units 70 80 70 80 70 80 Fineness, Hegman 3 3 4 Drying time, mina 60 15 5 a ASTM D 711. Table 6Quantitative Requirements of Yellow Paint Characteristics Requirements Type S Type N Type F Min. Max. Min. Max. Min. Max. Pigment, percent 61.0 63.0 60.0 62.0 50.0 52.0 Total solids, percent 77.

30、0 76.5 70.5 Nonvolatile vehicle, percent, by mass of vehicle 42.0 42.0 40.5 Density, kg/m3 (lb/gal) 1510 (12.6) 1678 (14.0) 1486 (12.4) Viscosity, Krebs units 70 80 70 80 70 80 Fineness, Hegman 3 3 4 Drying time, minutesa 69 15 5 a ASTM D 711. 5.5. Qualitative Requirements: 5.5.1. Condition in Conta

31、inerThe respective types of paint shall not show excessive settling, gelling, or curdling and shall be easily redispersed with a hand paddle to a smooth, homogeneous state. After storage for periods up to six months from date of packaging, the pigment shall be readily dispersed and viscosity of the

32、paint shall not have changed more than 5 KU from that of the freshly delivered paint. 5.5.2. Spraying PropertiesThe paint as received shall have satisfactory spraying and hiding properties when applied through a nozzle on a conventional traffic striper to a metal plate at a wet film thickness of 0.3

33、8 mm (15 mils). 5.5.3. AppearanceThe sprayed film shall dry to a smooth uniform finish free from roughness, unevenness, and other surface imperfections. 5.5.4. SkinningThe paint shall not skin within 48 h in a three-quarters-full, tightly closed container. 6. PACKAGING AND MARKING 6.1. The paint sha

34、ll 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, kind of paint, formula, 2013 by the American Association

35、of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-4c M 248-6 AASHTO number of liters (gallons), date of manufacture and lot number, title and number of this specification, and type of paint. 7. METHODS OF SAMPLING AND TESTING 7.1. Exce

36、pt as shown in Section 6.2, the paint shall be sampled and tested in accordance with the appropriate method in Fed. Std. No. 141. If no method exists in the Federal Test Method, the appropriate ASTM method shall be used. Note 2Because of the volatility of the solvents used, extreme care must be take

37、n when testing Type F paint for pigment and solids. It is recommended that closed containers, weighing bottles, and transfer devices such as syringes or pipettes be used. High results for pigments and solids can be expected if weighing precautions are not taken. 7.2. The purchaser may utilize X-ray

38、analysis, gas chromatography, infrared, or ultraviolet spectral analysis of the paint or its components to determine whether specified ingredients were used. Evidence of adulteration or improper formulation shall be cause for rejection. 2013 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.