1、Designation: D 1865 89 (Reapproved 2002)Standard Test Method forHardness of Mineral Aggregate Used on Built-Up Roofs1This standard is issued under the fixed designation D 1865; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the ye
2、ar of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 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 an
4、y, 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:D 75 Practice for Sampling Aggregates2D 451 Test Me
5、thod for Sieve Analysis of Granular MineralSurfacing for Asphalt Roofing Products3E 11 Specification for Wire Cloth and Sieves for TestingPurposes43. Summary of Test Method3.1 Mineral aggregate is empirically evaluated for degree ofbreakdown into smaller pieces. The procedure calls for asample, free
6、 of fines, to be dropped a distance of 1.2 m (4 ft )400 times while inside a standardized test apparatus.4. Significance 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.) ir
7、on 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 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 s
8、quare-opening sieves, 8 in. indiameter, conforming to the requirements prescribed in Speci-fication E 11 and consisting of the 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 Sha
9、ker, conforming to the require-ments prescribed in Test Method D 451.6. Sampling6.1 Sample aggregates received in bulk in accordance withPractice D 75.6.2 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
10、 number in the shipment.7. Procedure7.1 Fractionate the aggregate, previously dried at 110C(230F) utilizing the riffle-type sample splitter, 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-mm(38-in.) sieve and
11、 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 complete removal ofthe finer materials.7.3 Weigh out 200 g (0.44 lb) of the aggregate retained onthe 6.
12、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 half turns),
13、 control-ling the rate of travel so that the aggregate drops cleanlywithout sliding.1This test method is under the jurisdiction of ASTM Committee D08 on Roofingand Waterproofing and is the direct responsibility of Subcommittee D08.03 onSurfacing and Bituminous Materials for Membrane Waterproofing an
14、d Built-upRoofing.Current edition approved Nov. 24, 1989. Published January 1990. Originallypublished as D 1865 61 T. Last previous edition D 1865 83 (1988)e1.2Annual Book of ASTM Standards, Vol 04.03.3Annual Book of ASTM Standards, Vol 04.04.4Annual Book of ASTM Standards, Vol 14.02.1Copyright ASTM
15、 International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.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 r
16、emove 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 3 0.1 g (104-lb).8. Report8.1 Record the percentage retained on each sieve and in thepan to the
17、 nearest 0.1 % 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
18、95 % probability) 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 t
19、wo laboratoriesshould not be considered suspect unless they differ by morethan the following amount:Breakdown Range, % Reproducibility, percentage points0to25 6109.2 BiasThe procedure in Test Method D 1865 for mea-suring the hardness of mineral aggregate has no bias becausethe value obtained can be
20、defined only in 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 expre
21、ssly advised that 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
22、 either reapproved 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 a
23、ttend. If you feel 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 reprints (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).D 1865 89 (2002)2
