1、Designation: C475/C475M 02 (Reapproved 2007) C475/C475M 12Standard Specification forJoint Compound and Joint Tape for Finishing GypsumBoard 1This standard is issued under the fixed designation C475/C475M; the number immediately following the designation indicates the yearof original adoption or, in
2、the case of revision, the year of last revision. 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*
3、1.1 This specification covers all-purpose, taping and finishing joint compounds, paper joint tape and glass-mesh joint tape.1.1.1 The joint materials used in this standard are designed to be used with gypsum board installed in accordance withSpecification C840.1.2 This specification also covers the
4、minimum requirements for an assembly of taping and all-purpose compound and jointtape.1.3 The text of this specification references notes and footnotes that provide explanatory material. These notes and footnotes(excluding those in tables and figures) shall not be considered as requirements of the s
5、pecification.1.4 The values stated in either inch-pound or SI (metric) units are to be regarded separately as standard. Within the text, the SIunits are shown in parentheses. The values stated in each system shall be used independent of the other. Values from the twosystems shall not be combined.2.
6、Referenced Documents2.1 ASTM Standards:2C11 Terminology Relating to Gypsum and Related Building Materials and SystemsC474 Test Methods for Joint Treatment Materials for Gypsum Board ConstructionC840 Specification for Application and Finishing of Gypsum BoardD123 Terminology Relating to TextilesD3382
7、 Test Methods for Measurement of Energy and Integrated Charge Transfer Due to Partial Discharges (Corona) UsingBridge TechniquesF1615 Specification for Cautionary Labeling for Five-Gallon Open-Head Plastic Containers3. Terminology3.1 DefinitionsDefinitions shall be in accordance with Terminology C11
8、.3.2 Definitions of Terms Specific to This Standard:3.2.1 glass-mesh joint-tape, na strip of multidirectional glass yarn material designed to reinforce the joint between twogypsum boards.3.2.2 joint tape, na strip of material used to conceal and reinforce the joint between two gypsum boards.3.2.3 jo
9、int tape, self-adhering, na joint tape manufactured to adhere directly to the substrate.3.2.3.1 DiscussionTapes having this quality do not require mechanical or embedment means of attachment to the substrate.1 This specification is under the jurisdiction of ASTM Committee C11 on Gypsum and Related B
10、uilding Materials and Systems and is the direct responsibility ofSubcommittee C11.02 on Specifications and Test Methods for Accessories and Related Products.Current edition approved June 1, 2007Sept. 1, 2012. Published October 20072012. Originally approved in 1961. Last previous edition approved in
11、20022007 asC475 02.C475/C475M 02 (2007). DOI: 10.1520/C0475_C0475M-02R07.10.1520/C0475_C0475M-12.2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Doc
12、ument Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user 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
13、recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as 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 Bo
14、x C700, West Conshohocken, PA 19428-2959. United States13.2.4 paper joint tape, na strip of paper reinforcing material designed to be embedded in the joint compound and to reinforcethe joint between two gypsum boards.3.2.5 skewness, nas defined in Terminology D123.4. Physical Properties4.1 GeneralTh
15、e physical properties shall be determined in accordance with Test Methods C474, except as noted.4.2 Joint Compounds.4.2.1 Check CrackingNo cracks in the thinner half of the wedge and no deep fissure cracks in the thicker half of the wedge.4.2.2 PutrefactionNo putrefaction in less than 4 days.4.2.3 S
16、hrinkageNot more than 35 % by volume.4.3 Joint TapeTape: The following tests are required of all joint tape:4.3.1 WidthShall be not less than 178 in. (48 mm) nor more than 214 in. (60 mm). The width of an individual roll shall varynot more than 6The following tests are required of all joint tape:132
17、 in. (1 mm).4.3.1.1 WidthShall be not less than 178 in. (48 mm) nor more than 214 in. (60 mm). The width of an individual roll shall varynot more than 6132 in. (1 mm).4.3.1.2 ThicknessShall be not more than 0.012 in. (0.30 mm).4.3.1.3 Tensile StrengthShall be not less than 30 lbf/in. (5.25 N/mm) in
18、the cross direction.4.3.2 ThicknessShall be not more than 0.012 in. (0.30 mm).The following tests are required of paper joint tape:4.3.2.1 Dimensional StabilityShall expand not more than 0.4 % lengthwise and not more than 2.5 % crosswise.4.3.3 Tensile StrengthShall be not less than 30 lbf/in. (5.25
19、N/mm) in the cross direction.The following test is required ofglass-mesh joint tape:4.3.3.1 Skewness, when tested in accordance with Test Method A5, shall be not more than 8.75 %.4.4 The following tests are required of paper joint tape:Assembly of Taping or All-Purpose Compound and Paper Joint Tape:
20、4.4.1 Dimensional StabilityShall expand not more than 0.4 % lengthwise and not more than 2.5 % crosswise.4.4.1 Assembly of Taping or All-Purpose Compound and Joint Tape: Bond between the joint tape and the joint compound shallbe not less than 90 %.4.4.2.1 Bond between the joint tape and the joint co
21、mpound shall be not less than 90 %.4.4.2.2 Edge Cracking shall be not more than 10 % along the edges of the tape specimen.4.4.2 Edge cracking shall be not more than 10 % along the edges of the tape specimen.4.5 The following test is required of glass-mesh joint tape:4.5.1 Skewness, when tested in ac
22、cordance with Test Method D3382, shall be not more than 8.75 %.5. Sampling5.1 Sampling of Joint CompoundAt least 1 %, but not less than one package or container shall be sampled and shall be soselected as to be representative of the shipment. The material so obtained shall be thoroughly blended and
23、divided. Provide notless than one 6-lb (2.75-kg) sample for the test.5.2 Sampling of Joint TapeAt least one roll for every ten cases or a fraction thereof, but not more than ten rolls per shipmentshall constitute a sample.6. Inspection6.1 Inspection of the joint compound and joint tape shall be agre
24、ed upon between the purchaser and the supplier as part of thepurchase agreement.7. Rejection7.1 Rejection of joint compound and joint tape that fails to conform to requirements of this specification shall be reported tothe producer or supplier promptly and in writing. The notice of rejection shall c
25、ontain a statement documenting how the jointcompound or joint tape has failed to conform to the requirements of this specification.8. Certification8.1 When specified in the purchase agreement, a producers or suppliers report shall be furnished at the time of shipmentcertifying that the product is in
26、 compliance with this specification.9. Packaging and Package Marking9.1 Joint compound and joint tape shall be marked on each item or package with the name, brand or trademark of themanufacturer or seller, size, and volume or net weight of contents.C475/C475M 1229.2 Joint compound packaged in 3-12 t
27、hrough 6-12 gal (U.S. liquid) (13 through 25 L) open-head pails shall be labeled inaccordance with Specification F1615.10. Keywords10.1 all-purpose compound; bond; check cracking; dimensional stability; edge cracking; finishing compound; glass-mesh jointtape; joint compound; joint tape; paper joint
28、tape; putrefaction; shrinkage; taping compound; tensile strength; topping compoundSUMMARY OF CHANGES(1) Revised 4.3 to include all standards pertaining to joint tape alone, including glass mesh tape.(2) Revised 4.4 to pertain to the assembly of paper joint tape and taping or all-purpose joint compou
29、nd.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 infringement of such rights,
30、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 or for additional stan
31、dardsand 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 known to the ASTM Comm
32、ittee 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).C475/C475M 123
