1、Designation: C 1230 96 (Reapproved 2004)Standard Test Method forPerforming Tension Tests on Glass-Fiber ReinforcedConcrete (GFRC) Bonding Pads1This standard is issued under the fixed designation C 1230; the number immediately following the designation indicates the year oforiginal adoption or, in th
2、e case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 rein
3、forced concrete (GFRC) bondingpads used for attaching steel anchors to GFRC architecturalpanels.1.2 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 p
4、ractices and determine the applica-bility of regulatory limitations prior to use.1.3 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are providedfor information only.2. Referenced Documents2.1 ASTM Standards:2D76 Specification for Tensile Test
5、ing 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 support design. In addition, testresults may be u
6、sed 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 andin which the error in the force measuring
7、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 notexceed 1.0 % of the total deflection of t
8、he 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 E4and Speci-fication D76.4.2 Loading Fixtur
9、eThe 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 loading1This test method is under the jurisdiction of ASTM Committee C27 on Precas
10、tConcrete Products and is the direct responsibility of Subcommittee C27.40 onGlass-Fiber Reinforced Concrete Made by the Spray-Up Process.Current edition approved Dec. 1, 2004. Published January 2005. Originallyapproved in 1993. Last previous edition approved in 1996 as C1230 96.2For referenced ASTM
11、 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.NOTE 1Manufacture test specimens to keep flex anchor legs asvertical as possible.
12、 Support the legs if necessary during curing of thematrix.FIG. 1 Tension Test Fixture1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.fixture shall be such that the specimen is rigidly attached to thebase support. In particular, the s
13、ection 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. Use a universal joint betweenthe grip and crossh
14、ead 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 preparedat the same time and in a manner identi
15、cal 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. Conditioning7.1 Condition specimens under the same c
16、onditions asproduction panels prior to test.8. Procedure8.1 Align the specimen in the center of the base plate orbase support.8.2 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.
17、8.4 Failure is defined as the maximum load, or when thereis visible distress to the GFRC bonding pad. 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 anc
18、horcontinues to take additional load. In these instances there is ameasurable drop in load, observed 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
19、 to each other, accurate to the nearest 0.1 in. (2.5mm).8.7 Measure the average thickness of bonding 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,FIG. 2 Suitable Test FixtureFIG. 3 Suitable Test
20、 FixtureC 1230 96 (2004)29.1.2 Age of specimen (if artificially aged, include descrip-tion of process with time, temperature, etc.),9.1.3 Specimen dimensions,9.1.4 Anchor size,9.1.5 Bonding pad dimensions including thickness over thetop of the anchor,9.1.6 Maximum applied force, pounds-force (or New
21、tons),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 C 1230 for measuring the tensile load capacity ofGFRC bonding pads is being determined.10.2 BiasSince there is no accepted reference materialsui
22、table for determining the bias for the procedure in TestMethod C 1230 for measuring the tensile load capacity, biashas not been determined.11. Keywords11.1 anchor; bonding pads; bonding strength; tensile loadASTM International takes no position respecting the validity of any patent rights asserted i
23、n 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 subject to revision at any time by the r
24、esponsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive car
25、eful 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 standard is copyrighted by ASTM Internation
26、al, 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).FIG. 4 Test SpecimenC 1230 96 (2004)3
