1、Designation: C 1381/C 1381M 97 (Reapproved 2008)e1Standard Specification forMolded Glass Fiber Reinforced Gypsum Parts1This standard is issued under the fixed designation C 1381/C 1381M; the number immediately following the designation indicates theyear of original adoption or, in the case of revisi
2、on, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.e1NOTEThe units statement in subsection 1.2 was corrected and the standard was changed to a dual designation edito
3、riallyin July 2008.1. Scope1.1 This specification covers molded glass fiber reinforcedgypsum (GRG) parts, which are nonload-bearing, thin-shell,ornamental shapes for architectural embellishment of interiorbuilding construction.1.2 The values stated in either SI units or inch-pound unitsare to be reg
4、arded separately as standard. Within the text, theSI units are shown in brackets. The values stated in eachsystem may not be exact equivalents; therefore, each systemshall be used independently of the other. Combining valuesfrom the two systems may result in non-conformance with thestandard.1.3 The
5、information presented refers to the molded surfaceof the part.1.4 The text of this standard references footnotes, whichprovide explanatory material. These footnotes shall not beconsidered as requirements of the standard.2. Referenced Documents2.1 ASTM Standards:2C11 Terminology Relating to Gypsum an
6、d Related Build-ing Materials and SystemsC 1355/C 1355M Specification for Glass Fiber ReinforcedGypsum Composites3. Terminology3.1 DefinitionsDefinitions of terms shall be in accordancewith Terminology C11.3.2 Definitions of Terms Specific to This Standard:3.2.1 control thickness, nthe thickness of
7、the GRG partwhere abutting other GRG parts, other products or at fasteningpoints.3.2.2 embedments, nmaterials encapsulated into the partfor the purpose of suspension, attachment, and stiffening.3.2.3 finish surface, na surface against a mold.3.2.4 GRG part, nan individual molded component usedas arc
8、hitectural embellishment.3.2.5 GRG product, ncombination of GRG parts used asarchitectural embellishment.3.2.6 mock-up, na presentation assembly of GRG partsdefined by the purchase agreement.3.2.7 part thickness, nthickness of a part at any measure-ment point.4. Materials and Manufacture4.1 Material
9、sGRG parts shall be produced using the samematerials used to make the composites in conformance withSpecification C 1355/C 1355M.4.2 Manufacture:4.2.1 GRG parts shall be manufactured from the mixedslurry of alpha gypsum cement, potable water and additives,when used, and not less than 5 % by weight g
10、lass fiberreinforcement using either the hand lay-up or the spray-upprocess in a mold.4.2.2 GRG parts shall be produced according to approvedshop drawings.4.2.3 Shop drawings shall specify part dimensions, quanti-ties, recommended attachment points and methods, reinforce-ments, embedments, and toler
11、ance.5. Mechanical Properties5.1 GRG parts shall be made from materials to makecomposites having properties in accordance with SpecificationC 1355/C 1355M.6. Dimensions and Tolerances of GRG Parts6.1 Part ThicknessThe thickness of the GRG part shall benot less than316 in. 5 mm.6.2 Control Thickness,
12、 shall be not less than516 in. 8 mm.6.3 StraightnessAt any point on a line generally along aplane, an edge, or a surface, the molded side of the part shallnot vary from straight 618 in. in 8 linear ft 1 mm in 750 mm.1This specification is under the jurisdiction of ASTM Committee C11 onGypsum and Rel
13、ated Building Materials and Systems and is the direct responsibilityof Subcommittee C11.01 on Specifications and Test Methods for Gypsum Products.Current edition approved May 1, 2008. Published July 2008. Originally approvedin 1998. Last previous edition approved in 2002 as C 1381 97(2002)1.2For ref
14、erenced 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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, We
15、st Conshohocken, PA 19428-2959, United States.6.4 Dimensions, as specified in approved shop drawings,pertaining to the individual part.6.4.1 Overall Width, 618 in. 3 mm.6.4.2 Dimensions Within the Overall Width, 6116 in. 2mm.6.4.3 Overall Length, 618 in. 3 mm.6.4.4 Dimensions Within the Overall Leng
16、th, 6116 in. 2mm.7. Workmanship, Finish and Appearance7.1 GRG parts shall be produced to quality, tolerances, andsurface standards set within this specification.7.2 The standard finished surface shall be suitable to receiveflat paint.7.3 Finishes with sheen, direct light or special lightingcondition
17、s require additional coats of primer, sanding andfinishing by the installer or painter.8. Sampling8.1 When specified by the purchase agreement, samples ofthe GRG part shall be taken at the place of manufacture formeasuring in accordance with Section 6.8.2 Mock-UpWhen specified by the purchase agreem
18、ent,a mock-up shall be supplied.9. Inspection9.1 Inspection of the GRG parts shall be agreed uponbetween the purchaser and the supplier as part of the purchaseagreement.10. Rejection and Rehearing10.1 Rejection of GRG parts that fail to conform to therequirements of this specification shall be repor
19、ted in writing tothe producer or supplier within 14 calendar days from receiptof parts and prior to installation.11. Certification11.1 When specified in the purchase agreement, the pur-chaser shall be furnished certification that samples representingeach lot have been either tested or inspected as d
20、irected in thisspecification and the requirements have been met. Whenspecified in the purchase agreement, a report of test resultsshall be furnished.12. Quality Assurance12.1 Each manufacturers measuring of samples shall berepresentative of actual production procedures and materials.The GRG manufact
21、urer shall certify that the materials are thesame as those used to produce the composite according toC 1355/C 1355M.13. Marking13.1 Each GRG part shall be marked clearly according tothe project shop drawings.14. Packaging14.1 Packaging shall ensure that the GRG parts arrive at thejobsite in good con
22、dition when handled and shipped accordingto industry operating standards.15. Keywords15.1 glass fiber reinforced gypsum; glass fiber reinforcedgypsum composite; glass fiber reinforced gypsum parts; GRG;GRG composites; GRG partsASTM International takes no position respecting the validity of any paten
23、t 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 subject to revision a
24、t 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 or for additional standardsand should be addressed to ASTM International Headquarters. Your commen
25、ts 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
26、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).C 1381/C 1381M 97 (2008)e12
