ASTM_D_7958_-_D_7958M_-_17.pdf

Designation:D7958/D7958M17Standard Test Method forEvaluation of Performance for FRP Composite Bonded toConcrete Substrate using Beam Test1This standard is issued under the fixed designation D7958/D7958M;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.Scope1.1 This test method describes the apparatus and procedurefor evaluating the performance of wet lay-up or pultrudedFiber-Reinforced Polymer(FRP)composite systems adhe-sively bonded to a flat concrete substrate.The test determinesthe maximum force that an FRP system can bear beforedetaching from a concrete beam tested in flexure.Failure willoccur along the weakest plane within the system composed ofthe FRP composite,adhesive,and concrete substrate.1.2 This test method is used for assessment and comparisonof FRP systems subject to environmental conditioning.Thistest method is not intended for job approval or productqualification purposes.1.3 This test method is intended for use with adhesive-applied FRP systems and is appropriate for use with FRPsystems having any fiber orientation or combination of plyorientations comprising the FRP composite,although the testcondition only considers forces in the direction parallel to thebeam longitudinal axis.1.4 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system are not exact equivalents;therefore,each systemmust be used independently of the other.Combining valuesfrom the two systems may result in nonconformance with thestandard.1.4.1 Within the text,the inch-pound units are shown inbrackets.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,health and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:C31/C31M Practice for Making and Curing Concrete TestSpecimens in the FieldC33/C33M Specification for Concrete AggregatesC39/C39M Test Method for Compressive Strength of Cylin-drical Concrete SpecimensC42/C42M Test Method for Obtaining and Testing DrilledCores and Sawed Beams of ConcreteC78 Test Method for Flexural Strength of Concrete(UsingSimple Beam with Third-Point Loading)C125 Terminology Relating to Concrete and Concrete Ag-gregatesC150/C150M Specification for Portland CementC192/C192M Practice for Making and Curing Concrete TestSpecimens in the LaboratoryC511 Specification for Mixing Rooms,Moist Cabinets,Moist Rooms,and Water Storage Tanks Used in theTesting of Hydraulic Cements and ConcretesC617 Practice for Capping Cylindrical Concrete SpecimensD883 Terminology Relating to PlasticsD3039 Test Method for Tensile Properties of Polymer Ma-trix Composite MaterialsD3878 Terminology for Composite MaterialsD7565 Test Method for Determining Tensile Properties ofFiber Reinforced Polymer Matrix Composites Used forStrengthening of Civil StructuresE4 Practices for Force Verification of Testing MachinesE6 Terminology Relating to Methods of Mechanical TestingE122 Practice for Calculating Sample Size to Estimate,WithSpecified Precision,the Average for a Characteristic of aLot or Process1This test method is under the jurisdiction of ASTM Committee D30 onComposite Materials and is the direct responsibility of Subcommittee D30.10 onComposites for Civil Structures.Current edition approved Aug.1,2017.Published September 2017.DOI:10.1520/D7958_D7958M-17.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 E251 Test Methods for Performance Characteristics of Me-tallic Bonded Resistance Strain GagesE456 Terminology Relating to Quality and Statistics3.Terminology3.1 Terminology D3878 defines terms relating to high-modulus fibers and their composites.Terminology D883 de-fines terms relating to plastics.Terminology E6 defines termsrelating to mechanical testing.Terminology C125 defines termsrelating to concrete.Terminology E456 and Practice E122define terms relating to statistics.In the event of a conflictbetween terms,Term