1、Designation: C 1228 96 (Reapproved 2009)Standard Practice forPreparing Coupons for Flexural and Washout Tests onGlass Fiber Reinforced Concrete1This standard is issued under the fixed designation C 1228; the number immediately following the designation indicates the year oforiginal adoption or, in t
2、he 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 practice covers preparation of test coupons to beused in tests of plant manufact
3、ured thin-section 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 pu
4、rport 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 ASTM Standards:2C
5、 947 Test Method for Flexural Properties of Thin-SectionGlass-Fiber-Reinforced Concrete (Using Simple BeamWith Third-Point Loading)C 1229 Test Method for Determination of Glass FiberContent in Glass Fiber Reinforced Concrete (GFRC)(Wash-Out Test)3. Significance and Use3.1 Flexural strengths, as dete
6、rmined by Test Method C 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 u
7、sed to make test specimensfor Test Method C 947 and for Test Method C 1229 todetermine the amount of glass fiber reinforcement per unitvolume of GFRC for quality control purposes.4. Apparatus4.1 FormThe form shall be rectangular in shape; madefrom wood, fiberglass reinforced plastic (FRP), GFRC, or
8、steelwith dimensions of12 in. (13 mm) 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 Sampl
9、ing shall be in accordance with governing speci-fications.6. Procedure6.1 For plant manufactured product quality control pur-poses, 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 productionm
10、aterials except no mist coat or face mix should be used.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 us
11、ing the same methods andconditions as that used for production products.8. Coding8.1 Identify each sample board, and coupons.9. Retained Samples9.1 Retain samples as prescribed by Test Method C 947.10. Keywords10.1 coupons; flexural tests; glass fiber content; glass fiberreinforced concrete (GFRC);
12、strength1This practice is under the jurisdiction of ASTM C27 on Precast ConcreteProducts and is the direct responsibility of Subcommittee C27.40 on Glass FiberReinforced Concrete Made by the Spray-Up Process.Current edition approved May 1, 2009. Published May 2009. Originallyapproved in 1993. Last p
13、revious edition approved in 2004 as C 1228 96(2004).2For referenced ASTM 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.1Copyrigh
14、t ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.ASTM 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 tha
15、t 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 responsible technical committee and must be reviewed every five years andif not revised, either reappro
16、ved 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 careful consideration at a meeting of theresponsible technical committee, which you may attend. If you fe
17、el 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. Individual rep
18、rints (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. 1 Locations for Coupons Taken from 18 by 48 by12-in. (450by 1200 by 13-mm) GFRC BoardC 1228 96 (2009)2
