1、Designation:D1865/D1865M09(Reapproved 2017)Standard 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,
2、the year of last 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 roof
3、s and isintended 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 indep
4、endently of the other.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 h
5、ealth practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D75/D75M Practice for Sampling AggregatesD451/D451M Test Method for Sieve Analysis of GranularMineral Surfacing For Asphalt Roofing ProductsE11 Specification for Woven Wi
6、re Test Sieve Cloth and TestSieves3.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.Signi
7、ficance and Use4.1 This test 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
8、 axisperpendicular to the long 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 foll
9、owing:Sieve Designation9.5-mm38in.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/D451M.6.Sampling6.1 Sample aggregates received in bulk in accordance withPrac
10、tice D75/D75M.6.2 For aggregates received 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,u
11、ntil a fractionis obtained that will permit 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 sieveshake
12、r and agitate for 10 min to ensure complete 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
13、pipe in an arcof 180,reverse direction,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-upRoo
14、fing.Current edition approved Jan.1,2017.Published January 2017.Originallyapproved in 1961.Last previous edition approved in 2009 as D1865/D1865M 09.DOI:10.1520/D1865_D1865M-09R17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.Fo
15、r Annual Book of ASTMStandards volume 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 StatesThis international standard was developed in accordance with internationally r
16、ecognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 end-for-end 200 complete revolutions(400 half turns),control-ling the rate of travel so that the aggregate drops cleanlywithout 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