1、Designation: C 587 04Standard Specification forGypsum Veneer Plaster1This standard is issued under the fixed designation C 587; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indi
2、cates the year of last reapproval. Asuperscript 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. Scope*1.1 This specification covers calcined gypsum mixed at themill with other ingredie
3、nts to control working quality andsetting time; specifically designed as a veneer plaster to beapplied over gypsum base for veneer plasters, masonry orconcrete surfaces to a maximum thickness of14 in. (6.4 mm)providing a surface ready for decoration.NOTE 1Specification C 843 contains application pro
4、cedures for gyp-sum veneer plaster.1.2 This specification covers test methods for determiningthe physical properties of gypsum veneer plasters and sets forthminimum requirements that must be met.1.3 The values stated in inch-pound units are to be regardedas the standard. The SI (metric) values given
5、 in parentheses areapproximate and are provided for information purposes only.1.4 The text of this standard references notes and footnoteswhich provide explanatory material. These notes and footnotesshall not be considered as requirements of the standard.1.5 The following safety hazards caveat appli
6、es only to theTest Methods portion, Section 5 of this specification: Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applica
7、bility of regulatory limita-tions prior to use.2. Referenced Documents2.1 ASTM Standards:2C11 Terminology Relating to Gypsum and Related Build-ing Materials and SystemsC 473 Test Methods for Physical Testing of Gypsum PanelProductsC 843 Specification for Application of Gypsum VeneerPlasterC 1396/C 1
8、396M Specification for Gypsum Board3. Terminology3.1 Definitions:3.1.1 Definitions of terms shall be in accordance withTerminology C11and Specification C 843.3.2 Definition of Term Specific to This Standard:3.2.1 gypsum veneer plaster systems, nveneer plasterapplied in accordance with Specification
9、C 843 to gypsum basefor veneer plasters.4. Physical Properties4.1 Joint StrengthGypsum veneer plaster systems appliedin accordance with Specification C 843 shall be tested inaccordance with 5.9. The breaking load shall be not less thanthe parallel to surfacing loads specified in SpecificationC 1396/
10、C 1396M.4.2 Bond StrengthThe bond strength of the gypsum ve-neer plaster to the gypsum veneer base and, where applicable,between the base coat plaster and the finish coat shall notdelaminate when tested in accordance with 5.6.4.3 Impact StrengthGypsum veneer plaster systems shallnot crack or lose bo
11、nd beyond the impact area when tested inaccordance with 5.7.4.4 FlexureGypsum veneer plaster systems shall exhibitcrack resistance within the field of the gypsum base for veneerplasters such that radial or random cracking shall extend notmore than12 in. (13 mm) from the break line at failure whentes
12、ted in accordance with 5.8. At rupture of the panel theveneer plaster shall be securely bonded to the face paper.5. Test Methods5.1 MaterialsGypsum Base for Veneer Plaster, see Speci-fication C 1396/C 1396M.5.2 SamplingSample not less than 1 % of the packages,but not less than 5 packages. Select pac
13、kages to be sampled atrandom. Take samples both from the outer portion and thecenter of each package. Thoroughly mix the materials soobtained to provide a composite sample of not less than 15 lb1This specification is under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Material
14、s and Systems and is the direct responsi-bility of Subcommittee C11.01 on Specifications and Test Methods for GypsumProducts.Current edition approved Dec. 1, 2004. Published December 2004. Originallyapproved in 1966. Last previous edition approved in 2002 as C 587 02.2For referenced ASTM standards,
15、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.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM Internation
16、al, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.(6.8 kg). Place this composite sample immediately in a clean,dry, airtight container for delivery to the laboratory.5.3 Test Unit PreparationFrom the sample, prepare pan-els of veneer plaster system and cut four
17、2 ft (600 mm) square,and three 12 by 16 in. (300 by 400 mm) specimens.5.4 ConditioningCondition specimens to constant weightat a temperature of 85 6 15 F (29.5 6 8.5 C) and relativehumidity of 50 6 2 % (see Note 2). Test specimens individu-ally after constant weight is reached.NOTE 2Laboratory test
18、results indicate that conditioning temperaturesmay range from 70 to 100 F (21 to 38 C) without significantly affectingthe results. However, relative humidity is critical. Therefore, specimensshall be tested within 10 min upon removal from the conditioningchamber.5.5 Number of TestsRun each test in t
19、riplicate.5.6 Bond Strength:5.6.1 Significance and UseThe bond strength test isdesigned to evaluate the bond of veneer plaster to veneerplaster base and between the base coat and finish coat. Thedegree of correlation between these test methods and serviceperformance has not been determined.5.6.2 Pro
20、cedureSelect three 2 ft (600 mm) square speci-mens. Raise each specimen and slam the back side (face nottreated with veneer plaster) on a bare concrete floor repeatedlyuntil the specimen is broken.5.6.3 ReportReport whether the sample passes or fails thebond test. The sample fails if the bond to the
21、 veneer base orbetween the finish coast and base coat delaminates on any oneof the specimens.5.6.4 Precision and BiasNo information is presentedabout either the precision or bias of the bond test since the testresult is nonquantitative.5.7 Impact Strength:5.7.1 Significance and UseThe impact strengt
22、h is de-signed to test the effect of impact from a hard object on thesurface of the veneer plaster. The degree of correlation betweenthis test method and service performance has not been deter-mined.5.7.2 Apparatus:5.7.2.1 A stand with a solid, flat base at least 2 ft (600 mm)square with a means of
23、holding the steel ball and releasing itfrom a height of 36 in. above the base, without impartingadditional force.5.7.2.2 A 112 in. (38 mm) diameter polished steel ballweighing 7.8 6 0.1 oz (221 6 3 g).5.7.3 ProcedureSelect one 2 ft (600 mm) square. Placethe specimen horizontally, with the plaster su
24、rface face up, onthe base of the apparatus . Drop the steel ball three times ontodifferent areas of the panel surface.5.7.4 ReportReport whether the sample passes or fails theimpact test. The sample fails if there is a loss of bond orcracking beyond the impact area on any one of the drops.5.7.5 Prec
25、ision and BiasNo information is presentedabout either the precision or bias of the impact test since thetest result is nonquantitative.5.8 Flexure:5.8.1 Significance and UseThe flexure test is designed totest the effect on the resistance to cracking and bond of theveneer plaster to the veneer plaste
26、r base while being flexed.The degree of correlation between this test method and serviceperformance has not been determined.5.8.2 ApparatusUse the apparatus described in TestMethods C 473 for Method B.5.8.3 ProcedureSelect three 12 by 16 in. (300 by 400mm) specimens. Subject each specimen to a conti
27、nuous,midpoint, loading applied at a rate of 1 in./min 6 5 s (25mm/min 6 5 s) downward to the back of the panel (plastersurface in tension) supported over a clear span of 14 in. (356mm) until failure.5.8.4 ReportReport whether the sample passes or fails theflexure test. The sample fails if any one o
28、f the specimens showscracking more than12 in. (13 mm) from the break line or if thebond of the veneer plaster to the paper fails.5.8.5 Precision and BiasNo information is presentedabout either the precision or bias of the flexure test since thetest result is nonquantitative.5.9 Joint Strength:5.9.1
29、Significance and UseThe joint strength test is de-signed to test strength of the joint between two adjacentgypsum veneer panels that have been covered with veneerplaster. The degree of correlation between this test method andservice performance has not been determined.5.9.2 ApparatusUse the apparatu
30、s described in TestMethods C 473 for Method B.5.9.3 Specimen PreparationCut two 8 by 12-in. (200 by300-mm) pieces of gypsum base for veneer plaster for eachspecimen to be tested. One 12-in. edge of each piece shall bethe paper-bound edge. Place the two pieces of gypsum base forveneer plaster face do
31、wn with the paper-bound edges formingthe joint. Apply a pregummed tape over the joint. (The tapewill keep the joint from flexing during the specimen prepara-tion.) Turn face up and apply joint tape and gypsum veneerplaster in accordance with Specification C 843 using themethod titled “Reinforcement
32、Secured and Embedded withVeneer Plaster.”5.9.4 ProcedureCondition the specimen and determinethe flexural strength in accordance with Test Methods C 473Method B.Apply the load parallel to and directly over the backof the joint.5.9.5 ReportCalculate and report the average breakingload in pound-force o
33、r newtons, rounded to the nearest 1 lbf(N).5.9.6 Precision and BiasThe precision and bias for mea-suring joint strength are essentially as specified in Test Meth-ods C 473.6. Inspection6.1 Inspection of the gypsum veneer plaster shall be agreedupon between the purchaser and the supplier as part of t
34、hepurchase agreement.7. Rejection and Rehearing7.1 Rejection of gypsum veneer plaster that fails to conformto the requirements of this specification shall be reported to theproducer or supplier promptly and in writing. The notice ofC587042rejection shall contain a statement documenting how thegypsum
35、 veneer plaster has failed to conform to the require-ments of this specification.8. Certification8.1 When specified in the purchase agreement, a manufac-turers or suppliers report shall be furnished at the time ofshipment certifying that the product is in compliance with thisspecification.9. Packagi
36、ng and Package Marking9.1 Gypsum veneer plaster shall be dry and free from lumps,and shall be shipped in packages.9.2 When shipped for resale, the following informationshall be legibly marked on each package or on a tag of suitablesize attached thereto:9.2.1 Name of producer or supplier,9.2.2 Brand,
37、9.2.3 Description, and9.2.4 Net or gross weight, or both, of package.10. Keywords10.1 gypsum; gypsum veneer plaster; plaster; veneer plasterSUMMARY OF CHANGESCommittee C11 has identified the location of selected changes to this specification since the last issue,C 587 02, which may impact the use of
38、 this specification. (Approved December 1, 2004)(1) Replaced Specification C 588/C 588M with SpecificationC 1396/C 1396M throughout.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
39、 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 andif n
40、ot 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, which
41、 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).C587043
