1、Designation:D1865/D1865M09Standard Test Method forHardness of Mineral Aggregate Used on Built-Up Roofs1This standard is issued under the fixed designation D1865/D1865M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last
2、revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the determination of hardness ofall types of mineral surfacing for use on built-up roofs and isintended
3、to provide an index of their ability to withstandphysical breakdown in handling.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the o
4、ther.Combiningvalues from the two systems may result in non-conformancewith the standard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices a
5、nd determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D75 Practice for Sampling AggregatesD451 Test Method for Sieve Analysis of Granular MineralSurfacing For Asphalt Roofing ProductsE11 Specification for Woven Wire Test Sieve Cloth and Test
6、Sieves3.Summary of Test Method3.1 Mineral aggregate is empirically evaluated for degree ofbreakdown into smaller pieces.The procedure calls for asample,free of fines,to be dropped a nominal distance of 1.2 m4 ft 400 times while inside a standardized test apparatus.4.Significance and Use4.1 This test
7、 method measures the resistance to physicalbreakdown in handling of built-up roofing aggregates.5.Apparatus5.1 A 1.2-m 4-ft length of clean 50-mm 2-in.iron pipefitted with a removable screw cap on both ends,and mountedon a suitable stand so that it can be rotated about an axisperpendicular to the lo
8、ng dimension of the pipe.5.2 Balance,500-g 1 lb capacity,sensitive to 0.01%of thecapacity.5.3 Sample Splitter,riffle-type.5.4 SievesA series of square-opening sieves,8 in.indiameter,conforming to the requirements prescribed in Speci-fication E11 and consisting of the following:Sieve Designation9.5-m
9、m38in.6.3-mm14in.3.35-mmNo.6 A solid collecting pan shall be fitted to the bottom of thestack of sieves.5.5 Mechanical Sieve Shaker,conforming to the require-ments prescribed in Test Method D451.6.Sampling6.1 Sample aggregates received in bulk in accordance withPractice D75.6.2 For aggregates receiv
10、ed in bags or small containers,select a number of bags or small containers at randomequivalent to the cube root of the total number in the shipment.7.Procedure7.1 Fractionate the aggregate,previously dried at 110C230F utilizing the riffle-type sample splitter,until a fractionis obtained that will pe
11、rmit the recovery,after hand sieving,ofabout 227 g 0.5-lb of aggregate passing through the 9.5-mm38-in.sieve and retained on the 6.3-mm 14-in.sieve.7.2 Place the 9.5-mm 38-in.and 6.3-mm 14-in.sievescontaining the 227 g 0.5-lb sample on the mechanical sieveshaker and agitate for 10 min to ensure comp
12、lete removal ofthe finer materials.7.3 Weigh out 200 g 0.44 lb of the aggregate retained onthe 6.3-mm 14-in.sieve and place inside the 50-mm 2-in.pipe tester.Screw the caps tightly in place.Beginning with thepipe in a substantially vertical position,rotate the pipe in an arcof 180,reverse direction,
13、and repeat this action by turning1This test method is under the jurisdiction ofASTM Committee D08 on Roofingand Waterproofing and is the direct responsibility of Subcommittee D08.03 onSurfacing and Bituminous Materials for Membrane Waterproofing and Built-upRoofing.Current edition approved Dec.1,200
14、9.Published January 2010.Originallyapproved in 1961.Last previous edition approved in 2002 as D1865 89(2002).DOI:10.1520/D1865_D1865M-09.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume infor
15、mation,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 end-for-end 200 complete revolutions(400 half turns),control-ling the rate of travel so that the aggregate drops cleanl
16、ywithout sliding.7.4 At the end of the test,unscrew the top cap,turn the pipeover,and empty the contents onto a nest consisting of the6.3-mm 14-in.and No.6 3.35-mm sieves and the pan.Tapthe tube sharply to remove all of the sample.Place the nest ofsieves in the mechanical sieve shaker and run for 5 min.Carefully weigh the portion of the sample retained on each ofthe sieves and on the pan to an accuracy of 2 0.1 g 104-lb.8.Report8.1 Record the percentage retained on each sieve and in thepan to th
