1、Designation:C122896(Reapproved 2015)Standard Practice forPreparing Coupons for Flexural and Washout Tests onGlass Fiber Reinforced Concrete1This standard is issued under the fixed designation C1228;the number immediately following the designation indicates the year oforiginal adoption or,in the case
2、 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 practice covers preparation of test coupons to beused in tests of plant manufactured thin-sec
3、tion glass fiberreinforced concrete(GFRC).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 standard does not purport to addres
4、s 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:2C947 Test Method for
5、 Flexural Properties of Thin-SectionGlass-Fiber-Reinforced Concrete(Using Simple BeamWith Third-Point Loading)C1229 Test Method for Determination of Glass Fiber Con-tent in Glass Fiber Reinforced Concrete(GFRC)(Wash-Out Test)3.Significance and Use3.1 Flexural strengths,as determined by Test Method C
6、947,are used for quality control and design of GFRC products andmay be used to verify compliance with specifications and tocollect data in research and development programs.It is,therefore,important that coupons be prepared according to astandard practice.The coupons are used to make test specimensf
7、or Test Method C947 and for Test Method C1229 to determinethe amount of glass fiber reinforcement per unit volume ofGFRC for quality control purposes.4.Apparatus4.1 FormThe form shall be rectangular in shape;madefrom wood,fiberglass reinforced plastic(FRP),GFRC,or steelwith dimensions of12in.(13 mm)
8、deep by 18 in.(450 mm)wide and 48 in.(1200 mm)long.4.2 Steel Trowel,at least 20 in.(500 mm)long.4.3 Serrated Roller,with handle.4.4 Strike-Off Bar(screed),at least 20 in.(500 mm)long,for leveling and thickness control of specimens.5.Sampling5.1 Sampling shall be in accordance with governing speci-fi
9、cations.6.Procedure6.1 For plant manufactured product quality controlpurposes,spray the glass fiber reinforced material into the testform using the same method as used in production.Themethods and conditions should be the same as for productionmaterials except no mist coat or face mix should be used
10、.6.2 Trim off excess material from the sides of the form usinga steel trowel.6.3 Trowel surface smooth using a steel trowel.6.4 See Fig.1 for cutting layout for flexural test couponsand washout test coupons.7.Curing7.1 Cure the sample panel using the same methods andconditions as that used for produ
11、ction products.8.Coding8.1 Identify each sample board,and coupons.9.Retained Samples9.1 Retain samples as prescribed by Test Method C947.1This practice is under the jurisdiction of ASTM Committee C27 on PrecastConcrete Products and is the direct responsibility of Subcommittee C27.40 on GlassFiber Re
12、inforced Concrete.Current edition approved May 1,2015.Published June 2015.Originallyapproved in 1993.Last previous edition approved in 2009 as C1228 96(2009).DOI:10.1520/C1228-96R15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.
13、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 10.Keywords10.1 coupons;flexural tests;glass fiber content;glass fiberrein
14、forced concrete(GFRC);strengthASTM International takes no position respecting the validity 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 infr
15、ingement of such rights,are entirely their own responsibility.This standard is subject to revision at any time by the responsible 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
16、or for additional standardsand should be addressed to ASTM International Headquarters.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 standard is copyrighted by ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.Indi
