1、Designation:D451/D451M91(Reapproved 2013)1Standard Test Method forSieve Analysis of Granular Mineral Surfacing For AsphaltRoofing Products1This standard is issued under the fixed designation D451/D451M;the number immediately following the designation indicates the yearof original adoption or,in the
2、case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEUnits information was editorially corrected in July 2013.1.Scope1.1 This test method covers the det
3、ermination of the particlesize distribution of granular mineral surfacing material such ascrushed slate,stone,coated granules,and so forth,used on theweather surface of prepared asphalt roofing and shingles.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as
4、standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently 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,assoc
5、iated 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:2E11 Specification for Woven Wire Test Sieve Cloth and TestSi
6、eves3.Summary of Test Method3.1 A weighed sample of granular mineral surfacing mate-rial is separated through a series of sieves of progressivelysmaller openings for the determination of particle size distri-bution.4.Significance and Use4.1 This test method is used to determine the grading ofmateria
7、ls used as granular mineral surfacing.The results areused to determine compliance of the particle size distributionwith applicable specification requirements.5.Apparatus5.1 SievesAset of the sieves listed in Table 1,conformingto Specification E11.For routine testing,the group of sievesactually used
8、shall include only those appropriate for thegranular material being graded.Coarser or finer sieves,onwhich less than 0.05 mass%of the specimen would be foundafter sieving,need not be included in the group.5.2 Sieve Shaker A mechanically operated sieve shakerthat produces a uniform rotary motion and
9、tapping action with140 to 160 taps per minute.The sieve shaker shall be fitted witha hard maple plug to receive the impact of the tapping device.The entire apparatus shall be rigidly mounted by bolting to asolid foundation,preferably concrete.5.3 Sample Splitter A riffle sampler with 9.5 or 12.7-mm3
10、8or12-in divisions,for reducing the sample to the specimenrequired for sieve analysis.5.4 BalanceA laboratory balance sensitive to 0.1 g.6.Sampling6.1 Each shipment of mineral granules of a single type shallbe considered a unit for sampling.If a shipment contains morethan one type of granule,the ent
11、ire quantity of each type in thevehicle shall be considered a unit for sampling.6.2 Take the sample of mineral granules shipped in bulkfrom the chute or conveyor while the vehicle is being loaded orunloaded.The ideal place is just where the material drops fromthe chute or belt.Collect equal portions
12、 from the full width andthickness of the stream at regular intervals with such frequencythat a minimum of five samples will be taken and the total massof the sample will not be less than 7.3 kg 16 lb.Do not allowthe sampling receptacle to overflow under any circumstances.Overflow would tend to rejec
13、t a higher proportion of the largeparticles than the small ones,and a representative samplewould not be obtained.The sample should not include theinitial material discharge from the chute or conveyor.1This test method is under the jurisdiction ofASTM Committee D08 on Roofingand Waterproofing and is
14、the direct responsibility of Subcommittee D08.02 on SteepRoofing Products and Assemblies.Current edition approved July 1,2013.Published July 2013.Originally approvedin 1973.Last previous edition approved in 2008 as D451 91(2008).DOI:10.1520/D0451_D0451M-91R13.2For referenced ASTM standards,visit the
15、 ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For 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 Stat
16、es1 6.3 Take the sample from a shipment of mineral granulesshipped in bags,selected at random and equal in number to thecube root of the total number of bags in the vehicle.Collectequal portions of 800 to 900 g from each of the bags taken forsampling and combine.7.Test Specimen7.1 Reduce the sample by riffling to a specimen of 200 to250 g.Use the entire specimen obtained from reduction of thesample for the sieve analysis.8.Procedure8.1 Assemble the group of sieves selected from Table 1 inorder,w
