1、Designation:D86810(Reapproved 2015)Standard Practice forDetermination of Degree of Bleeding of Traffic Paint1This standard is issued under the fixed designation D868;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last re
2、vision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice describes test procedures for determiningthe degree of bleeding of traffic or pavement marking paints.Aspecific form
3、ulation for a solventborne traffic paint formulationis included as a potential bleeding reference control.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concern
4、s,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D226 Specification for Asphalt-Saturated Organ
5、ic Felt Usedin Roofing and WaterproofingD227 Specification for Coal-Tar-Saturated Organic FeltUsed in Roofing and WaterproofingD476 Classification for Dry Pigmentary Titanium DioxideProductsD867 Specification for Pumice Pigment(Withdrawn 1993)3D1199 Specification for Calcium Carbonate PigmentsD2244
6、Practice for Calculation of Color Tolerances andColor Differences from Instrumentally Measured ColorCoordinatesE1347 Test Method for Color and Color-Difference Mea-surement by Tristimulus Colorimetry3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 bleeding characteristic,nthat c
7、ondition of discolor-ation manifested in traffic paint when applied to tar orasphaltic-type substrates.3.1.1.1 DiscussionThe amount of discoloration can becomparing the color of the test coating and a specific referencecoating using colorimetric measurements or by visual compari-son to the amount of
8、 bleeding in a reference photograph.4.Significance and Use4.1 Solvents in a traffic paint may cause bleeding ofpavement constituents into the traffic marking,thereby render-ing the traffic marking less effective as a lane or directionalindicator.This practice describes how to prepare a panel of thec
9、oating to be tested and a reference panel coated with a specificsolventborne traffic paint to be used as a control for evaluation.4.2 This practice can be particularly useful for evaluation ofsolventborne traffic paints,but it may also be used for othertypes of traffic markings including waterborne
10、traffic paints.4.3 Two basic procedures are described for measuring theamount of bleeding.The procedure used shall be agreed uponby the purchaser and seller.5.Apparatus5.1 Film ApplicatorA conventional type drawdown gagethat casts a film having a minimum width of 50 mm(2 in.)andan approximate wet th
11、ickness of 380 m(15 mils)(using anapplicator clearance of approximately 760 m(30 mils).5.2 Test Panel for Coal-Tar SubstrateA 127 by 254-mm(5 by 10-in.)piece cut from a standard roll of so-called“6.8-kg(15-lb)coal-tar saturated heat resistant or rag felt.”Unlessotherwise specified,use a Specificatio
12、n D227 coal tar saturatedfelt.5.3 Test Panel for Asphalt SubstrateA 127 by 254-mm(5by 10-in.)piece cut from a standard roll of 6.8-kg(15-lb)asphalt-saturated felt.Unless otherwise specified,use a Speci-fication D226(Type 1)asphalt saturated felt.5.4 Paint Composition for Use as a ControlThe paintcom
13、position shown in Table 1 can be used as a control whenapplied to 6.8 kg(15 lb)felt.This formulation will show severebleeding when applied on a coal tar substrate and a somewhatlower degree of bleeding when applied on the asphalt feltsubstrate.1This practice is under the jurisdiction of ASTM Committ
14、ee D01 on Paint andRelated Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.44 on Traffic Coatings.Current edition approved June 1,2015.Published June 2015.Originallyapproved in 1946.Last previous edition approved in 2010 as D868 10.DOI:10.1520/D0868-10R15.2For
15、 referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced o
16、nwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.Preparation of Test Panels6.1 Cut 125 by 255 mm(5 by 10 in.)pieces from a roll ofcoal tar or asphalt substrate.The specimens shall be cut at least127 mm(5 in.)in from the edge.6.2 Prepare the non-bleeding contrast surface by attaching a25 mm(1 in.)of cellophane tape to the coal tar or asphaltsubstrate piece using firm pressure.The tape shall be posi-tioned so that the out