1、Designation:C 588/C 588M 03e1Standard Specification forGypsum Base for Veneer Plasters1This standard is issued under the fixed designation C 588/C 588M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A numbe
2、r 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.e1NOTEThe word rating(s)was added to the term fire resistance throughout
3、 editorially October 2004.1.Scope*1.1 This specification covers types of gypsum base that aredesigned to be used as a base for application of veneer plaster(see Specification C 587).NOTE1Specification C 843 contains application procedures for gyp-sum veneer plaster,and Specification C 844 contains a
4、pplication proce-dures for gypsum base for veneer plaster.1.2 The values stated in either inch-pound or SI(metric)units are to be regarded separately as the standard.Within thetext,the SI units are shown in brackets.The values stated ineach system shall be used independently of the other.Valuesfrom
5、the two systems shall not be combined.1.3 The text of this standard references notes and footnotesthat provide explanatory material.These notes and footnotes(excluding those in tables and figures)shall not be consideredas requirements of the standard.2.Referenced Documents2.1 ASTM Standards:2C 11 Te
6、rminology Relating to Gypsum and Related Build-ing Materials and SystemsC 473 Test Methods for Physical Testing of Gypsum PanelProductsC 587 Specification for Gypsum Veneer PlasterC 645 Specification for Nonstructural Steel Framing Mem-bersC 843 Specification for Application of Gypsum VeneerPlasterC
7、 844 Specification for Application of Gypsum Base toReceive Gypsum Veneer PlasterC 1264 Specification for Sampling,Inspection,Rejection,Certification,Packaging,Marking,Shipping,Handling,and Storage of Gypsum BoardE 96 Test Methods for Water Vapor Transmission of Mate-rialsE 119 Test Methods for Fire
8、 Tests of Building Constructionand Materials3.Terminology3.1 DefinitionsDefinitions of terms used in this specifica-tion shall be in accordance with Terminology C 11.4.Materials and Manufacture4.1 Gypsum base for veneer plaster shall consist of anoncombustible core,essentially gypsum,surfaced with p
9、aperbonded to the core.4.2 Foil-backed gypsum base for veneer plasters shall con-sist of gypsum base for veneer plasters with a layer ofaluminum foil laminated to the back surface.4.3 Gypsum base for veneer plaster,type X(special fire-resistant)designates gypsum base complying with this speci-ficati
10、on that provides not less than 1-h fire resistance rating forboards58in.15.9 mm thick or34-h fire resistance rating forboards12in.12.7 mm thick,applied parallel with and oneach side of load bearing 2 by 4 wood studs spaced 16 in.406mm on center with 6d coated nails,178in.48 mm long,0.0915 in.2.32 mm
11、 diameter shank,14in.6.4 mm diameterheads,spaced 7 in.178 mm on center with gypsum basejoints staggered 16 in.406 mm on each side of the partitionand tested in accordance with Test Methods E 119.NOTE2Consult manufacturers for independent test data on assemblydetails and fire resistance ratings for o
12、ther types of construction.See firetest reports or listings from recognized fire testing laboratories forassembly particulars,materials,and ratings.5.Physical Requirements5.1 Specimens shall be taken from the samples obtained inaccordance with Specification C 1264.5.2 Specimens shall be tested in ac
13、cordance with TestMethods C 473.1This 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 Gypsum Products.Current edition approved October 1,200
14、3.Published November 2003.Originallyapproved in 1966.Last previous edition approved in 2001 as C 588/C 588M 01.2For 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 standa
15、rds Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.NOTICE:This standard has either been superseded and replaced by a new version o
16、r withdrawn.Contact ASTM International(www.astm.org)for the latest information 5.2.1 Flexural StrengthThe specimens shall be tested faceup and face down.The average breaking load shall be not lessthan the following:Method AMethod BThickness,in.mmLoad,lbf NBearing EdgesAcross Fiberof SurfacingLoad,lbf NBearing EdgesParallel toFiber ofSurfacingLoad,lbf NBearing EdgesAcross Fiberof SurfacingLoad,lbf NBearing EdgesParallel toFiber ofSurfacing389.580 35630 13377 34326 1161212.7110 48940 178107 47636