1、Designation:C123096(Reapproved 2015)Standard Test Method forPerforming Tension Tests on Glass-Fiber ReinforcedConcrete(GFRC)Bonding Pads1This standard is issued under the fixed designation C1230;the number immediately following the designation indicates the year oforiginal adoption or,in the case of
2、 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.1.Scope1.1 This test method covers determination of the tensile loadcapacity of glass-fiber reinforced concrete(
3、GFRC)bondingpads used for attaching steel anchors to GFRC architecturalpanels.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This
4、 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
5、ASTM Standards:2D76 Specification for Tensile Testing Machines for TextilesE4 Practices for Force Verification of Testing Machines3.Significance and Use3.1 Tensile loads determined by this test method are usefulfor quality control of GFRC architectural panels manufacturedusing the steel panel frame
6、support design.In addition,testresults may be used to verify compliance with governingspecifications,research and development,and generating datafor use in product design.4.Apparatus4.1 Testing Machine,a properly calibrated testing machinethat can be operated at constant rates of crosshead motion an
7、din which the error in the force measuring system shall notexceed 61.0%of the maximum force expected to be mea-sured.Equip the testing machine with a deflection measuringand recording device.The stiffness of the testing machine shallbe such that the total elastic deformation of the system does notex
8、ceed 1.0%of the total deflection of the test specimen duringthe test,or appropriate corrections shall be made.The force-indicating mechanism shall be essentially free of inertial lag atthe crosshead rate used.The accuracy of the testing machineshall be verified in accordance with Practices E4 and Sp
9、ecifi-cation D76.4.2 Loading FixtureThe load fixture for applying tensileload is shown schematically in Fig.1.It consists of a12in.(13-mm)thick steel base plate.A suitable mechanism for testfixtures is shown in Fig.2 and Fig.3.The design of the loadingfixture shall be such that the specimen is rigid
10、ly attached to thebase support.In particular,the section of the specimen adjacentto the flex anchor shall not be allowed to bend while the anchoris being pulled in tension,in order to avoid force eccentricity.4.3 Gripping Device,a suitable mechanical gripping deviceor jaws to grip the steel anchor.U
11、se a universal joint betweenthe grip and crosshead of the testing machine to ensure theapplication of a tensile load for the duration of the test.5.Sampling5.1 The sampling method shall be in accordance withgoverning specifications.6.Test Specimen6.1 Saw the test specimens from a test board panel pr
12、eparedat the same time and in a manner identical to productionpanels.Saw the test specimens so they are nominally 12 in.square,the anchor is in the center,and the specimen edges area sufficient distance from the bonding pad to allow supportduring loading.Fig.4 shows the test specimen.7.Conditioning7
13、.1 Condition specimens under the same conditions asproduction panels prior to test.8.Procedure8.1 Align the specimen in the center of the base plate orbase support.1This test method is under the jurisdiction of ASTM Committee C27 on PrecastConcrete Products and is the direct responsibility of Subcom
14、mittee C27.40 on GlassFiber Reinforced Concrete.Current edition approved May 1,2015.Published June 2015.Originallyapproved in 1993.Last previous edition approved in 2009 as C1230 96(2009).DOI:10.1520/C1230-96R15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Custom
15、er Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 8.2 Rigidly clamp the specimen to the base p
16、late.8.3 Grip the anchor and apply tensile loads to the anchor ata pull-off displacement rate of 0.2 in.(5 mm)/min until failure.8.4 Failure is defined as the maximum load,or when thereis visible distress to the GFRC bonding pad.For small diameteranchors(316in.(5 mm)or less)or for certain bonding padgeometries,local failure of the glass-fiber reinforced concretehas been observed at the anchor heel,even though the anchorcontinues to take additional load.In these instances there is ameasurable dro