1、Designation: C 475/C 475M 02 (Reapproved 2007)Standard Specification forJoint Compound and Joint Tape for Finishing GypsumBoard1This standard is issued under the fixed designation C 475/C 475M; the number immediately following the designation indicates the yearof original adoption or, in the case of
2、 revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon (e) 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. Scope1.1 This specific
3、ation covers all-purpose, taping and finish-ing joint compounds, paper joint tape and glass-mesh jointtape.1.1.1 The joint materials used in this standard are designedto be used with gypsum board installed in accordance withSpecification C 840.1.2 This specification also covers the minimum require-m
4、ents for an assembly of taping and all-purpose compound andjoint tape.1.3 The text of this specification references notes andfootnotes that provide explanatory material. These notes andfootnotes (excluding those in tables and figures) shall not beconsidered as requirements of the specification.1.4 T
5、he values stated in either inch-pound or SI (metric)units are to be regarded separately as standard. Within the text,the SI units are shown in parentheses. The values stated in eachsystem shall be used independent of the other. Values from thetwo systems shall not be combined.2. Referenced Documents
6、2.1 ASTM Standards:2C11 Terminology Relating to Gypsum and Related Build-ing Materials and SystemsC 474 Test Methods for Joint Treatment Materials for Gyp-sum Board ConstructionC 840 Specification for Application and Finishing of Gyp-sum BoardD 123 Terminology Relating to TextilesD 3382 Test Methods
7、 for Measurement of Energy andIntegrated Charge Transfer Due to Partial Discharges(Corona) Using Bridge TechniquesF 1615 Specification for Cautionary Labeling for Five-Gallon Open-Head Plastic Containers3. Terminology3.1 DefinitionsDefinitions shall be in accordance withTerminology C11.3.2 Definitio
8、ns of Terms Specific to This Standard:3.2.1 glass-mesh joint-tape, na strip of multidirectionalglass yarn material designed to reinforce the joint between twogypsum boards.3.2.2 joint tape, na strip of material used to conceal andreinforce the joint between two gypsum boards.3.2.3 joint tape, self-a
9、dhering, na joint tape manufacturedto adhere directly to the substrate.3.2.3.1 DiscussionTapes having this quality do not re-quire mechanical or embedment means of attachment to thesubstrate.3.2.4 paper joint tape, na strip of paper reinforcingmaterial designed to be embedded in the joint compound a
10、nd toreinforce the joint between two gypsum boards.3.2.5 skewness, nas defined in Terminology D 123.4. Physical Properties4.1 GeneralThe physical properties shall be determinedin accordance with Test Methods C 474, except as noted.4.2 Joint Compounds.4.2.1 Check CrackingNo cracks in the thinner half
11、 of thewedge and no deep fissure cracks in the thicker half of thewedge.4.2.2 PutrefactionNo putrefaction in less than 4 days.4.2.3 ShrinkageNot more than 35 % by volume.4.3 Joint TapeThe following tests are required of all jointtape:4.3.1 WidthShall be not less than 178 in. (48 mm) normore than 214
12、 in. (60 mm). The width of an individual rollshall vary not more than 6132 in. (1 mm).4.3.2 ThicknessShall be not more than 0.012 in. (0.30mm).4.3.3 Tensile StrengthShall be not less than 30 lbf/in.(5.25 N/mm) in the cross direction.1This specification is under the jurisdiction of ASTM Committee C11
13、 onGypsum and Related Building Materials and Systems and is the direct responsibilityof Subcommittee C11.02 on Specifications and Test Methods for Accessories andRelated Products.Current edition approved June 1, 2007. Published October 2007. Originallyapproved in 1961. Last previous edition approved
14、 in 2002 as C 475 02.2For referenced 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
15、Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.4 The following tests are required of paper joint tape:4.4.1 Dimensional StabilityShall expand not more than0.4 % lengthwise and not more than 2.5 % crosswise.4.4.2 Assembly of Taping or All-Purpose Compound andJoint Tape:4
16、.4.2.1 Bond between the joint tape and the joint compoundshall be not less than 90 %.4.4.2.2 Edge Cracking shall be not more than 10 % alongthe edges of the tape specimen.4.5 The following test is required of glass-mesh joint tape:4.5.1 Skewness, when tested in accordance with TestMethod D 3882, sha
17、ll be not more than 8.75 %.5. Sampling5.1 Sampling of Joint CompoundAt least 1 %, but not lessthan one package or container shall be sampled and shall be soselected as to be representative of the shipment. The materialso obtained shall be thoroughly blended and divided. Providenot less than one 6-lb
18、 (2.75-kg) sample for the test.5.2 Sampling of Joint TapeAt least one roll for every tencases or a fraction thereof, but not more than ten rolls pershipment shall constitute a sample.6. Inspection6.1 Inspection of the joint compound and joint tape shall beagreed upon between the purchaser and the su
19、pplier as part ofthe purchase agreement.7. Rejection7.1 Rejection of joint compound and joint tape that fails toconform to requirements of this specification shall be reportedto the producer or supplier promptly and in writing. The noticeof rejection shall contain a statement documenting how thejoin
20、t compound or joint tape has failed to conform to therequirements of this specification.8. Certification8.1 When specified in the purchase agreement, a producersor suppliers report shall be furnished at the time of shipmentcertifying that the product is in compliance with this specifi-cation.9. Pack
21、aging and Package Marking9.1 Joint compound and joint tape shall be marked on eachitem or package with the name, brand or trademark of themanufacturer or seller, size, and volume or net weight ofcontents.9.2 Joint compound packaged in 3-12 through 6-12 gal (U.S.liquid) (13 through 25 L) open-head pa
22、ils shall be labeled inaccordance with Specification F 1615.10. Keywords10.1 all-purpose compound; bond; check cracking; dimen-sional stability; edge cracking; finishing compound; glass-mesh joint tape; joint compound; joint tape; paper joint tape;putrefaction; shrinkage; taping compound; tensile st
23、rength;topping compoundASTM 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 infringem
24、ent 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 or
25、 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 kn
26、own 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 475/C 475M 02 (2007)2
