1、Designation: C 1381 97 (Reapproved 2002)e1Standard Specification forMolded Glass Fiber Reinforced Gypsum Parts1This standard is issued under the fixed designation C 1381; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of
2、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.e1NOTE“Permissible Variations” has been editorially changed to “Tolerances” in the title of Section 6 June 2002.1. Scope1.1 This
3、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 inch-pound or SI units are tobe regarded separately as standard. Within the t
4、ext, the SI unitsare shown in parentheses. The values stated in each systemshall be used independent of the other. Values from the twosystems shall not be combined.1.3 The information presented refers to the molded surfaceof the part.1.4 The text of this standard references footnotes, whichprovide e
5、xplanatory material. These footnotes shall not beconsidered as requirements of the standard.2. Referenced Documents2.1 ASTM Standards:C 11 Terminology Relating to Gypsum and Related Build-ing Materials and Systems2C 1355/C 1355M Specification for Glass Fiber ReinforcedGypsum (GRG) Composites23. Term
6、inology3.1 DefinitionsDefinitions of terms shall be in accordancewith Terminology C 11.3.2 Definitions of Terms Specific to This Standard:3.2.1 control thickness, nthe thickness of the GRG partwhere abutting other GRG parts, other products or at fasteningpoints.3.2.2 embedments, nmaterials encapsula
7、ted 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 architectural embellishment.3.2.5 GRG product, ncombination of GRG parts used asarchitectural embellishment.3.2.6 mock-up,
8、 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 MaterialsGRG parts shall be produced using the samematerials used to make the composites in conformance withSpecification C 135
9、5/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 glass fiberreinforcement using either the hand lay-up or the spray-upprocess in a mold.4.2.2 GRG parts shall be produced
10、 according to approvedshop drawings.4.2.3 Shop drawings shall specify part dimensions, quanti-ties, recommended attachment points and methods, reinforce-ments, embedments, and tolerance.5. Mechanical Properties5.1 GRG parts shall be made from materials to makecomposites having properties in accordan
11、ce 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, shall be not less than516in. (8 mm).6.3 StraightnessAt any point on a line generally along aplane, an edge, or a sur
12、face, the molded side of the part shallnot vary from straight 618 in. in 8 linear ft (1 mm in 750 mm).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 L
13、ength, 618 in. (3 mm).6.4.4 Dimensions Within the Overall Length, 6116 in. (2mm).1This specification is under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Materials and Systems and is the direct responsibilityof Subcommittee C11.01 on Specifications and Test Methods for Gypsu
14、m Products.Current edition approved Dec. 10, 1997. Published June 1998.2Annual Book of ASTM Standards, Vol 04.01.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7. Workmanship, Finish and Appearance7.1 GRG parts shall be produced to
15、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 lightingconditions require additional coats of primer, sanding andfinishing by the installer or painter.8.
16、 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 agreement,a mock-up shall be supplied.9. Inspection9.1 Inspection of the GRG parts shall be agr
17、eed 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 reported in writing tothe producer or supplier within 14 calendar days from receiptof parts an
18、d 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 directed in thisspecification and the requirements have been met. Whenspecified in the pur
19、chase 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 manufacturer shall certify that the materials are thesame as those used to produce the composite
20、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 condition when handled and shipped accordingto industry operating standards.15. Keywords15.1
21、 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 patent rights asserted in connection with any item mentionedin this standard. Users of this st
22、andard 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 responsible technical committee and must be reviewed every five years a
23、ndif 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 careful consideration at a meeting of theresponsible technical committee,
24、 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. 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 13812
