ASTM_C_1072_-_13e1.pdf

Designation:C1072131Standard Test Methods forMeasurement of Masonry Flexural Bond Strength1This standard is issued under the fixed designation C1072;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()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.1NOTEEditorially corrected Table X1.1 in March 2014.1.Scope*1.1 These test methods evaluate the flexural bond strength,normal to the bed joints,of masonry built of manufacturedmasonry units.Sampling and testing procedures are referenced,and terms are defined.Three different specimen fabricationmethods are specified,each for a different purpose:1.1.1 The first method is the“Test Method for Laboratory-Prepared Specimens.”Its purpose is to compare the bondstrengths(under the given conditions)of masonry mortars.Itcould be used,for example,to check the quality of mortarproducts after production,or to indicate the bond strength(under the given conditions)of a mortar product withoutrequiring the product to be tested in combination with manydifferent units.It is not intended to represent field conditions.It uses standard concrete masonry units.Mortars are batchedby weight equivalents of volume proportions and are mixed toa prescribed flow.Prisms are constructed using a jig and arebag-cured.1.1.2 The second method is the“Test Method for Field-Prepared Specimens.”Its purpose is to evaluate the bondstrength(under the given conditions)of a particular unit-mortarcombination,either for preconstruction evaluation of materialsor for quality control purposes during construction.Mortars arebatched conventionally,and the flow is not prescribed.Prismsare constructed conventionally(no jig)and are bag-cured.1.1.3 The third method is the“Test Method for PrismsRemoved from Existing Masonry.”Its purpose is to evaluatethe bond strength of unit-mortar combinations of prisms cutfrom existing walls.1.1.4 The three methods are not consistent,nor are theyintended to be.They are intended to be used for three differentpurposes.To make this clear,the three methods are presentedseparately.1.1.5 Appendix X1 suggests two possible criteria for assess-ing the bond strength values obtained using these test methods.These possible evaluation criteria are given for illustration onlyand are not mandatory.1.2 The values stated in inch-pound units are to be regardedas the standard.The values given in parentheses are mathemati-cal conversions to SI units that are provided for informationonly and are not considered 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 health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C67 Test Methods for Sampling and Testing Brick andStructural Clay TileC140 Test Methods for Sampling and Testing ConcreteMasonry Units and Related UnitsC230/C230M Specification for Flow Table for Use in Testsof Hydraulic CementC270 Specification for Mortar for Unit MasonryC780 Test Method for Preconstruction and ConstructionEvaluation of Mortars for Plain and Reinforced UnitMasonryC1232 Terminology of MasonryC1437 Test Method for Flow of Hydraulic Cement MortarC1532 Practice for Selection,Removal,and Shipment ofManufactured Masonry Units and Masonry Specimensfrom Existing Construction2.2 Other Documents:TMS 402 ACI 530 ASCE 5 Building Code Requirementsfor Masonry Structures31These test methods are under the jurisdiction of ASTM Committee C15 onManufactured Masonry Units and are the direct responsibility of SubcommitteeC15.04 on Research.Current edition approved April 15,2013.Published April 2013.Originallyapproved in 1993.Last previous edition approved in 2012 as C1072 12.DOI:10.1520/C1072-13E01.2For 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.3AvailablefromtheMasonryStandardsJointCommittee,http:/www.masonrystandards.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 NBS Handbook 9143.Terminology3.1 Definitions:3.1.1 lot,nmaterial of a given quantity of a single type,grade,class,and brand and practically of the same nominalsize,color range,texture,and composition produced by asingle source by virtually the same process and under essen-tially the same conditions.3.2 For additional terms used in this test method,refer toTerminology C1232.TEST METHOD FOR LABORATORY-PREPARED SPECIMENS4.Summary of