1、Designation: C1230 96 (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
2、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.1. Scope1.1 This test method covers determination of the tensile loadcapacity of glass-fiber reinfor
3、ced concrete (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 s
4、tandard.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. Refe
5、renced Documents2.1 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 t
6、he steel panel frame 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 r
7、ates of crosshead motion andin 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 defor
8、mation of the system does notexceed 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
9、 accordance with Practices E4 and Specifi-cation D76.4.2 Loading FixtureThe load fixture for applying tensileload is shown schematically in Fig. 1. It consists of a12 in.(13-mm) thick steel base plate. A suitable mechanism for testfixtures is shown in Fig. 2 and Fig. 3. The design of the loadingfixt
10、ure shall be such that the specimen is rigidly 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 g
11、ripping deviceor jaws to grip the steel anchor. Use 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.
12、1 Saw the test specimens from a test board panel preparedat 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
13、 loading. Fig. 4 shows the test specimen.7. Conditioning7.1 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 PrecastCo
14、ncrete Products and is the direct responsibility of Subcommittee 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 stan
15、dards, 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.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, P
16、A 19428-2959. United States18.2 Rigidly clamp the specimen to the base plate.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 p
17、ad. For small diameteranchors (316 in. (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 drop in load, observ
18、ed on the load deflection graph.8.5 Record the maximum force and corresponding displace-ment attained prior to failure of the bonding pad.8.6 Measure the dimensions of the bonding pad at twolocations 90 to each other, accurate to the nearest 0.1 in. (2.5mm).8.7 Measure the average thickness of bondi
19、ng pad over theanchor when wet with pin gauge or when dry with caliper.9. Report9.1 Report the following information:9.1.1 Specimen identification number,9.1.2 Age of specimen (if artificially aged, include descrip-tion of process with time, temperature, etc.),9.1.3 Specimen dimensions,9.1.4 Anchor
20、size,9.1.5 Bonding pad dimensions including thickness over thetop of the anchor,9.1.6 Maximum applied force, pounds-force (or Newtons),9.1.7 Displacement at maximum load, inches, and9.1.8 Mode of failure.10. Precision and Bias10.1 PrecisionThe precision of the procedure in TestMethod C1230 for measu
21、ring the tensile load capacity ofGFRC bonding pads is being determined.10.2 BiasSince there is no accepted reference materialsuitable for determining the bias for the procedure in TestMethod C1230 for measuring the tensile load capacity, bias hasnot been determined.11. Keywords11.1 anchor; bonding p
22、ads; bonding strength; tensile loadNOTE 1Manufacture test specimens to keep flex anchor legs asvertical as possible. Support the legs if necessary during curing of thematrix.FIG. 1 Tension Test FixtureFIG. 2 Suitable Test FixtureC1230 96 (2015)2ASTM International takes no position respecting the val
23、idity 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 sub
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25、rters. 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 standa
26、rd 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:/ 3 Suitable Test FixtureFIG. 4 Test SpecimenC1230 96 (2015)3
