ASTM_C_131_C131M-14.pdf

Designation:C131/C131M-14NTERNATIONALStandard Test Method forResistance to Degradation of Small-Size Coarse Aggregateby Abrasion and Impact in the Los Angeles Machine1This standard is issued under the fixed designation C131/C131M:the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapprovalA superscript epsilon(e)indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.ScopeC136 Test Method for Sieve Analysis of Fine and Coarse1.1 This test method covers a procedure for testing of coarseAggregatesaggregates with a maximum size smaller than 37.5 mm(1C535 Test Method for Resistance to Degradation of Large-in.for resistance to degradation using the Los Angeles testingSize Coarse Aggregate by Abrasion and Impact in the Losmachine(Note 1)Angeles MachineC670 Practice for Preparing Precision and Bias StatementsNorE 1-A procedure for testing coarse aggregate larger than 19.0 mmfor Test Methods for Construction Materialsin.is covered in Test Method C535.Thus coarse aggregates with amaximum size between 19 mm 4 in.and 37.5 mm 1 in.may beC702 Practice for Reducing Samples of Aggregate to Testingtested by Test Method C535 or Test Method C131/C131M.Size1.2 The values stated in either SI units or inch-pound unitsD75 Practice for Sampling AggregatesE11 Specification for Woven Wire Test Sieve Cloth and Testare to be regarded separately as standard.The values stated inSieveseach system may not be exact equivalents:therefore,eachsystem shall be used independently of the other.Combining3.Terminologyvalues from the two systems may result in non-conformancewith the standard.3.1 Definitions-For definitions of terms used in this testmethod,refer to Terminology C125.NorE 2-Sieve size is identified by its standard designation in Speci-fication E11.The Alternative designation given in parentheses is for4.Summary of Test Methodinformation only and does not represent a different standard sieve size.1.3 This standard does not purport to address all of the4.1 This test is a measure of degradation of mineral aggre-safety concerns,if any,associated with its use.It is thegates of standard gradings resulting from a combination ofresponsibility of the user of this standard to establish appro-actions including abrasion or attrition,impact,and grinding inpriate safety and health practices and determine the applica-a rotating steel drum containing a specified number of steelbility of regulatory limitations prior to use.spheres,the number depending upon the grading of the testsample.As the drum rotates,a shelf plate picks up the sample2.Referenced Documentsand the steel spheres,carrying them around until they aredropped to the opposite side of the drum,creating an impact-2.1 ASTM Standards:2crushing effect.The contents then roll within the drum with anA6/A6M Specification for General Requirements for Rolledabrading and grinding action until the shelf plate picks up theStructural Steel Bars,Plates,Shapes,and Sheet Pilingsample and the steel spheres,and the cycle is repeated.AfterC125 Terminology Relating to Concrete and Concrete Ag-the prescribed number of revolutions,the contents are removedgregatesfrom the drum and the aggregate portion is sieved to measurethe degradation as percent loss.This test method is under the jurisdiction of ASTM Committee C09 on5.Significance and UseConcrete and Concrete Aggregates and is the direct responsibility of Subcommittee5.1 This test has been widely used as an indicator of theC09.20 on Normal Weight Aggregates.Current edition approved July 1,2014.Published July 2014.Originally approvedrelative quality or competence of various sources of aggregatein 1937.Last previous edition approved in 2006 as C131-06.DOI:10.1520/C0131having similar mineral compositions.The results do notC0131M-14.automatically permit valid comparisons to be made between2 For referenced ASTM standards,visit the ASTM website,www.astm.org,orsources distinctly different in origin,composition,or structure.contact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onAssign specification limits with extreme care in considerationthe ASTM website.of available aggregate types and their performance history in*A Summary of Changes section appears at the end of this standardCopyright ASTM Intemational,100 Barr Harbor Drive,PO Box C700.West Conshohocken.PA 19428-2959.United States1C131/C131M-14where:4.5%.3 Therefore,results of two properly conducted testsC mass of original test sample,g,andfrom two different laboratories on samples of the same coarsey final mass of the test sample,g.aggregates are not expected to differ from each other by morethan 12.7%3(95 probability)of their average.The single-11.Reportoperator coefficient of variation has been found to be2.0%.3 Therefore,results of two properly conducted tests by11.1 Report the following information:the same operator on the same coarse aggregate are not11.1.1 Identification of the aggregate as to source,type,andexpected to differ from each other by more than 5.7%(95nominal maximum size;probability)of their average.311.1.2 Grading designation from Table I used for the test;12.2 Bias-Since there is no accepted reference materialandsuitable for determining the bias for this procedure,no state-11.1.3 Loss by abrasion and impact of the sample expressedment on bias is being made.to the nearest 1 by mass.13.Keywords12.Precision and Bias13.1 abrasion;aggregate(coarse;small size);degradation;impact;Los Angeles machine12.1 For nominal 19.0-mm(34-in.)maximum size coarseaggregate with percent losses in the range of 10 to 45%the3These numbers represent.respectively,the(1s%)and(d2s%)limits asmultilaboratory coefficient of variation has been found to bedescribed in Practice C670.APPENDIX(Nonmandatory Information)X1.MAINTENANCE OF SHELFX1.1 The shelf of the Los Angeles machine is subject toradial position with respect to the cylinder.If either conditionsevere surface wear and impact.With use,the working surfaceis found,the shelf should be repaired or replaced before furtherof the shelf is peened by the balls and tends to develop a ridgetests are made.The influence on the test result of the ridgeof metal parallel to and about 32 mm 1/4 in.from the junctiondeveloped by peening of the working face of the shelf is notof the shelf and the inner surface of the cylinder.If the shelf isknown.However,for uniform test conditions,it is recom-made from a section of rolled angle,not only may this ridgemended that the ridge be ground off if its height exceeds 2 mmdevelop but the shelf itself may be bent longitudinally or0.1in小.transversely from its proper position.X1.2 The shelf should be inspected periodically to deter-mine that it is not bent either lengthwise or from its normalSUMMARY OF CHANGESCommittee C09 has identified the location of selected changes to this standard since the last issue(C131-06)that may impact the use of this standard.(Approved July 1,2014.)(7)Revised the standard into a dual measurement system with(4)Added Note 2.the units of measurement now stated in either SI units or(5)Repositioned Notes 7 and 8.inch-pound units.(6)Added Eq.1.(2)Revised Sections 1.5.6.8.9.(7)Replaced Fig.1.(3)Revised Notes 1,3,and 6.44C131/C131M-14ASTM Intemational 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 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,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 attend.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).Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center,222Rosewood Drive,Danvers,MA 01923,Tel:(978)646-2600;http:/