1、Designation: C 1228 96 (2004)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 the case of
2、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 practice covers preparation of test coupons to beused in tests of plant manufactured thin-
3、section glass fiberreinforced concrete (GFRC).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 practices and determine the applica-bility of regul
4、atory 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:2C 947 Test Method for Flexural Properties of Thin-SectionGlass-Fiber-Reinforced Conc
5、rete (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 determined by Test Method C 947,are used for quality control and design of GFRC product
6、s 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 specimensfor Test Method C 947 and for Test Method C 1229 todeterm
7、ine 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 steelwith dimensions of12 in. (13 mm) deep by 18 in. (450 mm)wide and 48 in. (1200
8、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-fications.6. Procedure6.1 For plant
9、 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 productionmaterials except no mist coat or face mix should be used.6.2 Trim off excess materia
10、l 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 production products.8. Coding8.
11、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); strength1This practice is under the jurisdiction of ASTM C27 on Precast ConcretePro
12、ducts and is the direct responsibility of Subcommittee C27.40 on Glass FiberReinforced Concrete Made by the Spray-Up Process.Current edition approved December 1, 2004. Published January 2005. Originallyapproved in 1993. Last previous edition approved in 1996 as C 1228 96.2For referenced ASTM standar
13、ds, 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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA
14、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 that determination of the validity of any such patent rights, and the riskof infrin
15、gement 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
17、 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 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. 1 Locations for Coupons Taken from 18 by 48 by12-in. (450by 1200 by 13-mm) GFRC BoardC 1228 96 (2004)2
