1、Designation: C318/C318M 00 (Reapproved 2010)C318/C318M 13Standard Specification forGypsum Formboard1This standard is issued under the fixed designation C318/C318M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last re
2、vision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope Scope*1.1 This specification covers the minimum
3、 requirements for gypsum formboard designed for use as a permanent form forpoured-in-place reinforced gypsum concrete roof decks.1.2 The values stated in either inch-pound units or SI (metric) are to be regarded separately as standard. Within the text, the SIunits are shown in brackets. The values s
4、tated in each system shall be used independent of the other. Values from the two systemsshall not be combined.1.3 The text of this standard references notes which provide explanatory material. These notes shall not be consideredrequirements of the standard.2. Referenced Documents2.1 ASTM Standards:2
5、C11 Terminology Relating to Gypsum and Related Building Materials and SystemsC22 Specification for GypsumC473 Test Methods for Physical Testing of Gypsum Panel ProductsC1264 Specification for Sampling, Inspection, Rejection, Certification, Packaging, Marking, Shipping, Handling, and Storage ofGypsum
6、 Panel ProductsG21 Practice for Determining Resistance of Synthetic Polymeric Materials to Fungi3. Terminology3.1 DefinitionsDefinitions of terms used in this standard shall be in accordance with Terminology C11.4. Materials and Manufacture4.1 Gypsum formboard shall consist of a noncombustible core,
7、 essentially gypsum, gypsum complying with Specification C22,containing not more than 15 % by weight of fiber, either mineral or organic, synthetic or natural.4.2 The face surface shall be specifically treated to resist fungus growth.5. Physical Properties5.1 Specimens shall be tested in accordance
8、with Test Methods C473.NOTE 1Since this product is laid between subpurlins without mechanical attachment, a nail pull requirement is not specified for this gypsum panelproduct.5.1.1 Specimens shall be taken from the samples obtained in accordance with Specification C1264.5.1.2 Flexural StrengthThe s
9、pecimens shall be tested face up and face down. The average breaking load shall be not less thanthe following:1 This specification is under the jurisdiction of ASTM Committee C11 on Gypsum and Related Building Materials and Systems and is the direct responsibility ofSubcommittee C11.01Specifications
10、 and Test Methods for Gypsum Products.Current edition approved Oct. 1, 2010Oct. 1, 2013. Published December 2010October 2013 Originally approved in 1953. Last previous edition approved in 20052010as C318/C318M 00 (2010).(2005). DOI: 10.1520/C0318_C0318M-00R10.10.1520/C0318_C0318M-13.2 For referenced
11、ASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the use
12、r of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as
13、 published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1Bearing Edges AcrossFiber of Surfacing,lbf NBearing Edges Pa
14、r-allel Fiber of Sur-facing, Face, lbf NBearing Edges Par-allel Fiber of Sur-facing, Back, lbf NMethod A 160 715 60 270 40 180Method B 157 700 56 250 36 160Bearing Edges AcrossFiber of Surfacing,lbf NBearing Edges Par-allel Fiber of Sur-facing, Face, lbf NBearing Edges Par-allel Fiber of Sur-facing,
15、 Back, lbf NMethod A 160 715 60 270 40 180Method B 157 700 56 250 36 1605.1.3 Humidified DeflectionThe specimens shall have an average deflection of not more than the following:Thickness,in. (mm)Humidified Deflection,Eighths of an in. (mm)12 12.7 10 32Thickness,in. (mm)Humidified Deflection,Eighths
16、of an in. (mm)12 12.7 10 325.1.4 Core, End, and Edge HardnessThe specimens shall have an average hardness of 15 lbf 65 N when tested by MethodA and 11 lbf 50 N when tested by Method B.5.1.5 Resistance to FungiThe specimens shall obtain a rating not more than 1 (one) when judged in accordance with Pr
17、acticeG21, paragraph 9.3, (Observation for Visible Effects).6. Dimensions and Tolerances6.1 Specimens shall be taken from the samples obtained in accordance with Section 8.6.2 Thickness, width, length, and end squareness shall be determined in accordance with Test Methods C473.6.2.1 ThicknessThe nom
18、inal thickness shall be 12 in. 12.7 mm with tolerances in the nominal thickness of6164 in. 0.4 mmwith local variations of 6132 in. 0.8 mm from the nominal thickness.6.2.2 WidthThe nominal width shall be 32 in. 813 mm with a tolerance of 18 in. 3 mm over the specified width, and 14in. 6 mm under the
19、specified width.6.2.3 LengthThe nominal length of gypsum formboard shall conform to the purlin spacing of multiples thereof, withtolerances of 614 in. 6 mm from the nominal length.6.2.4 End SquarenessCorners shall be square with a tolerance of 618 in. 63 mm in the full width of the board.6.3 Edges a
20、nd EndsThe edges and ends shall be square (90 6 10), straight, and solid.7. Finish and Appearance7.1 The surfaces of gypsum formboard shall be true and free from imperfections that would render it unfit for use with orwithout decoration.8. Sampling, Inspection, Rejection, Certification, Packaging an
21、d Package Marking, Shipping, Handling and Storage8.1 The sampling, inspection, rejection, certification, packaging and package marking, shipping, handling and storage shall beconducted in accordance with Specification C1264.9. Keywords9.1 gypsum; gypsum concrete; gypsum formboard; gypsum panel produ
22、ct; roof decksSUMMARY OF CHANGESCommittee C11 has identified the location of selected changes to this specification since the last issue,C318/C318M00 (Reapproved 2010), that may impact the use of this specification. (Approved Oct. 1, 2013)(1) Revised 2.1 and 4.1.C318/C318M 132ASTM International take
23、s 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 infringement of such rights, are entirely their own res
24、ponsibility.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 or for additional standardsand should be addresse
25、d 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
26、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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).C318/C318M 133
