1、Designation: D1865/D1865M 09Standard 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
2、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 roofs and i
3、sintended 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 independe
4、ntly 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 Practice for Sampling AggregatesD451 Test Method for Sieve Analysis of Granular MineralSurfacing For Asphalt Roofing ProductsE11 Specification for Woven Wire Test Si
6、eve 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. Significan
7、ce 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 a
8、xisperpendicular 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 th
9、e following:Sieve Designation9.5-mm 38 in. 6.3-mm 14 in.3.35-mm No. 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
10、 withPractice D75.6.2 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 spli
11、tter, until 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 mechanic
12、al sieveshaker and agitate for 10 min to ensure complete removal ofthe finer materials.1This 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
13、and Built-upRoofing.Current edition approved Dec. 1, 2009. 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 a
14、t serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.3 Weigh out 200 g 0.44 lb of the aggregate reta
15、ined 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, and repeat this action by turningend-for-end 200 complete revolutions (400 hal
16、f 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-in. and No. 6 3.35-mm sieves and the pan. Tapthe tube sharply to remove all o
17、f 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 3 0.1 g 104-lb.8. Report8.1 Record the percentage retained on each sieve and in thepan to the nearest 0.1
18、% on the basis of the original sampleweight.8.2 Report the breakdown of the mineral surfacing as thepercentage passing the No. 6 3.35-mm sieve, on the basis ofthe original sample weight.9. Precision and Bias9.1 The following data should be used for judging theacceptability of results (95 % probabili
19、ty) on samples from thesame lot from the same supplier.9.1.1 Duplicate results by the same operator should not beconsidered suspect unless they differ by more than the follow-ing amount:Breakdown Range, % Repeatability, percentage points0to15 659.1.2 The results submitted by each of two laboratories
20、should not be considered suspect unless they differ by morethan the following amount:Breakdown Range, % Reproducibility, percentage points0to25 6109.2 BiasThe procedure in Test Method D1865 for mea-suring the hardness of mineral aggregate has no bias becausethe value obtained can be defined only in
21、terms of the testmethod.10. Keywords10.1 aggregate fiber; built-up roofs; mineral aggregate;sieve analysisASTM 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 tha
22、t determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reappro
23、ved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you fe
24、el that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual rep
25、rints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D1865/D1865M 092
