ASTM_C_1716_-_C_1716M_-_16.pdf

Designation:C1716/C1716M16Standard Specification forCompression Testing Machine Requirements for ConcreteMasonry Units,Related Units,and Prisms1This standard is issued under the fixed designation C1716/C1716M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification provides minimum design standardsfor testing machines used to measure the compressive strengthof concrete masonry units,related units,and masonry prismscovered under Test Methods C140 and C1314.1.2 The text of this standard references notes and footnoteswhich provide explanatory material.These notes and footnotes(excluding those in tables and figures)shall not be consideredas requirements of this standard.1.3 This specification shall be used to determine the maxi-mum allowable specimen size and the maximum allowableload limits on a specific specimen for any test machine.Theselimits are based on deflection of the bearing surfaces and themachine load frame.These limits may not reflect the actualcapacity of the machine and do not supersede the machinemanufacturers recommended operational limits.The user mustdetermine if testing machine capacities,allowable specimensize and maximum allowable load are appropriate for thesample to be tested.1.4 The values stated in either SI units or inch-pound unitsare to be regarded separately as 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.1.5 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:2C140 Test Methods for Sampling and Testing ConcreteMasonry Units and Related UnitsC1093 Practice for Accreditation of Testing Agencies forMasonryC1314 Test Method for Compressive Strength of MasonryPrismsE4 Practices for Force Verification of Testing Machines3.Terminology3.1 Definitions:3.1.1 bearing,adjdirect contact with the specimen beingtested,as in bearing plate,bearing block,and bearing platen.3.1.2 block,nsteel piece 50 mm 2 in.thick or greaterthat provides additional load capacity in bending to platens.3.1.2.1 DiscussionBlocks may be used to accommodatetesting specimens of various heights in a testing machine.3.1.3 composite,adjmade up of two or more pieces ormaterials.3.1.4 load frame,nall components of the testing machinethat react against forces applied to the test specimen duringtesting.3.1.5 plate,nsteel piece less than 50 mm 2 in.thick.3.1.5.1 DiscussionPlates are used to accommodate testspecimens of various heights in a testing machine but do notprovide additional load capacity in bending to platens orblocks.Plates can also be used as bearing surfaces.3.1.6 platen,nthe primary bearing surfaces of the testingmachine.1This specification is under the jurisdiction of ASTM Committee C15 onManufactured Masonry Units and is the direct responsibility of SubcommitteeC15.04 on Research.Current edition approved June 1,2016.Published July 2016.Originally approvedin 2010.Last previous edition approved in 2014 as C1716/C1716M 14.DOI:10.1520/C1716_C1716M-16.2For 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.*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 3.1.6.1 DiscussionPlaten is a general term without spe-cific properties implied.In general,the lower platen is semi-permanently fixed to the testing machine and the upper platenis semi-permanently fixed to a hemispherical thrust bearing.3.1.7 spacer,nplates,blocks,or equipment and fixturesspecific to a testing machine,used to adjust the position ofbearing surfaces to accommodate test specimens.NOTE1Plates,blocks or platens used in bearing must be hardened.Spacers do not have to be hardened.Blocks are structural while plates arenot.4.Testing Machine Requirements4.1 Machine Loading Requirements:4.1.1 The testing machine must be power operated andapply the load continuously,rather than intermittently,andwithout shock.4.1.2 The machine must be capable of maintaining specificloading rates required by the test.Variations in the loading rateover the elastic portion of the test shall not exceed 620%ofthe set loading rate.4.1.3 The testing machine must be capable of a minimum of50 mm 2 in