1、Designation:D 3202 94(Reapproved 2004)e1Standard Practice forPreparation of Bituminous Mixture Beam Specimens byMeans of the California Kneading Compactor1This standard is issued under the fixed designation D 3202;the number immediately following the designation indicates the year oforiginal adoptio
2、n or,in the case of revision,the year 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.e1NOTEAdjunct references corrected editorially in April 2006.1.Scope1.1 This practice covers
3、 the preparation of beams of bitu-minous paving mixtures by means of a mechanical compactorthat imparts a kneading action compacting the beam by a seriesof individual impressions made with a ram.1.2 The values stated in inch-pound units are to be regardedas the standard.The values given in parenthes
4、es are forinformation only.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 and determine the applica-bility of regulatory limitations prio
5、r to use.2.Referenced Documents2.1 ASTM Standards:2D 1561 Practice for Preparation of Bituminous Mixture TestSpecimens by Means of California Kneading Compactor2.2ASTM Adjuncts:Mold and Accessories33.Significance and Use3.1 This practice provides a standard method for compac-tion useful to practitio
6、ners and researchers engaged in testingand evaluation of bituminous mixtures using beam formspecimens.4.Apparatus4.1 California Kneading Compactor,mechanical,in accor-dance with Practice D 1561.4.2 Compactor FootA ram 2.0 by 3.0 in.(50.8 by 76.2mm).4.3 RodA round-nose steel rod,38-in.(9.5-mm)in diam
7、-eter by 16-in.(406.4-mm)long.4.4 MoldAbeam mold with inside dimensions 15 in.(381mm)long by 314in.(82.6 mm)wide and 412in.(114.3 mm)high as shown in Fig.1.4.5 Leveling BarAsteel bar 14.94 in.(379.5 mm)long by3.19 in.(81.0 mm)wide by 1.00 in.(25.4 mm)deep,stiffenedby a beveled-ended spline 12.94 in.
8、(328.6 mm)long by 1.00in.wide by 1.00 in.deep,centered on and welded to the top ofthe bar;or a solid steel bar of equal length and width havingdepth sufficient to provide at least equal stiffness as determinedby the moment of inertia about the neutral axis.4.6 Sliding Base AssemblyAn assembly attach
9、ed to thekneading compactor with a hand wheel or other means formoving the mold laterally during compaction.4.7 Extraction AssemblyA beam specimen extraction as-sembly as shown in Fig.2.NOTE1Copies of working drawing of the mold,sliding base assem-bly,leveling bar and extraction assembly suitable fo
10、r construction of thesepieces of apparatus are available as adjunct material.34.8 Paper,heavy sheets,3.25 by 15 in.(82.6 by 381 mm).4.9 Ovens,electric,capable of maintaining temperatures of200 to 325 6 5F(93.3 to 162.8 6 2.8C).4.10 Testing Machine,compression,having a minimumcapacity of 50 000 lbf(2
11、22 kN).4.11 Balance,having a capacity of 5 kg or more andsensitive to 1.0 g or less.4.12 Miscellaneous ApparatusThermometer,spatulas,spoons,gloves,metal pans,and mechanical mixer.5.Test Specimens5.1 Preparation of MixturePrepare approximately 6800 gof the bituminous mixture in accordance with 5.1 an
12、d 5.2 ofPractice D 1561 except for specific requirements given in 5.2and 6 of this practice.5.2 Size of SpecimensThe beam test specimens shall havea rectangular cross section of 314in.(82.6 mm)in width by 312in.(88.9 mm)in depth and a length of 15 in.(381 mm).1This recommended practice is under the
13、jurisdiction of ASTM Committee D04on Road and Paving Materials and is the direct responsibility of SubcommitteeD04.20 on Mechanical Tests of Bituminous Mixtures.Current edition approved Dec.1,2004.Published December 2004.Originallyapproved in 1973.Last previous edition approved in 2000 as D 3202 94(
14、2000).2For referenced ASTM standards,visit the 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.3Available from ASTM International Headquarters.Order Adjunc
15、t No.ADJD3202.Original adjunct produced in 1974.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.NOTICE:This standard has either been superseded and replaced by a new version or withdrawn.Contact ASTM International(www.astm.org)for the lat
16、est information.6.Procedure6.1 Temperatures The mixing temperatures shall be thatcorresponding to an asphalt viscosity of 170 6 20 cSt.Compaction temperature shall be that corresponding to anasphalt viscosity of 500 6 50 cSt.6.2 Molding Specimens:6.2.1 Heat the mold and the round-nose rod to the compac-tion temperature specified in 6.1.Lightly oil the mold andtamping foot.Place three sheets of 314(82.6)by 15-in.(381-mm)paper on the mold base plate.Maintain the compac-tor foot sufficiently hot pr
