1、Designation:D130993(Reapproved 2015)Standard Test Method forSettling Properties of Traffic Paints During Storage1This standard is issued under the fixed designation D1309;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of la
2、st revision.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 test method covers a laboratory procedure forsimulating in 2 weeks the settling that might occur in trafficpaint during
3、approximately 12 months normal storage.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 concerns,if any,associated with its use.It is theresponsibility of the use
4、r of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.For a specifichazard statement,see Note in 5.2.2.Referenced Documents2.1 ASTM Standards:2D869 Test Method for Evaluating Degree of Settling of Paint3.Signi
5、ficance and Use3.1 Paints,if not formulated or processed properly,or both,may settle excessively.This test method is an attempt tosimulate the conditions that would accelerate settling of thepigment in order to evaluate settling properties within 2 weeks.The variables of this test method in conjunct
6、ion with the verysubjective method of evaluating the degree of settling(TestMethod D869)raise questions as to the usefulness of the resultsfor specification compliance.4.Apparatus4.1 ContainerStandard 500-mL(1-pt),friction top canpaint container 85.5 6 1.5 mm(3386116in.)in diameter and98.5 6 1.5 mm(
7、3786116in.)in height.4.2 Spatula,weighing 45 6 1 g with square-end blade 125mm(434in.)in length and approximately 20 mm(1316in.)inwidth.A suitable spatula may be prepared by cutting the tipfrom an ordinary 125-mm(5-in.)flexible steel laboratoryspatula to the specified length.4.3 Freezer,maintained a
8、t from 21 to 23.3C(5 to10F).4.4 Oven,maintained at 71 6 1C(160 6 2F).4.5 Lid Clips.5.Procedure5.1 Thoroughly mix the paint to be evaluated to a homoge-neous consistency.Transfer enough of the paint to a 500-mL(1-pt)paint can to fill it to within 13 mm(12in.)of the top.Close the can tightly,securing
9、the lid with four clips,andsubject it to the following exposure cycle.5.1.1 Monday through Friday:5.1.1.1 Place in freezer at 8:00 a.m.5.1.1.2 Transfer to oven at 10:00 a.m.5.1.1.3 Transfer to freezer at 2:00 p.m.5.1.1.4 Transfer to oven at 4:00 p.m.5.1.2 From 4:00 p.m.Friday until 8:00 a.m.Monday:5
10、.1.2.1 Place in the oven at 4:00 p.m.Friday.5.1.2.2 At 8:00 a.m.Monday morning,after the can hasbeen in the oven over a weekend,place it in the freezer andcontinue the cycles described above for another 7 days.Eachtime the can of paint is removed from the oven give it onesharp“spank”on the table top
11、.The spank consists of a shortrapid jar of the bottom of the can of paint against the top of thetable.The violence of the jar is such that if the bottom of thecan of paint were spanked against the platform of a scaleinstead of a table top the scale would register approximately2.27 kg(5 lb)weight.5.2
12、 At the completion of the exposure,allow the paint tocool at room temperature for 4 h and determine the degree ofsettling in accordance with Test Method D869.NOTE1Open cans slowly and carefully to allow release of residualvapor pressure.6.Report6.1 Report the“accelerated settling rating”in accordanc
13、ewith the degree of settling scale given in the Procedure sectionof Test Method D869.1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.44 on Traffic Coatings.Current edition ap
14、proved June 1,2015.Published June 2015.Originallyapproved in 1954.Last previous edition approved in 2010 as D1309 93(2010).DOI:10.1520/D1309-93R15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards vo
15、lume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 7.Precision and Bias7.1 Due to the poor precision of Test Method D869,if it isused in a specification,the max
16、imum deviation from thesettling limits specified should be agreed upon between thepurchaser and the seller.7.2 BiasBias cannot be determined.8.Keywords8.1 paint testing;settling test;traffic paintASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.Users of this standard are expressly advised that determination of the validity of any such patent rights,and the riskof infringement of such rights,are entire