1、Designation: C587 04 (Reapproved 2014)Standard Specification forGypsum Veneer Plaster1This standard is issued under the fixed designation C587; 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
2、parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope1.1 This specification covers calcined gypsum mixed at themill
3、with other ingredients 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 C843 contai
4、ns application procedures 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 standard. The values giv
5、en in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.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 stan
6、dard.1.5 The following safety hazards caveat applies 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 sa
7、fety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2. Referenced Documents2.1 ASTM Standards:2C11 Terminology Relating to Gypsum and Related BuildingMaterials and SystemsC473 Test Methods for Physical Testing of Gypsum PanelProductsC843 Specification for
8、 Application of Gypsum Veneer Plas-terC1396/C1396M Specification for Gypsum Board3. Terminology3.1 Definitions:3.1.1 Definitions of terms shall be in accordance withTerminology C11 and Specification C843.3.2 Definitions of Terms Specific to This Standard:3.2.1 gypsum veneer plaster systems, nveneer
9、plasterapplied in accordance with Specification C843 to gypsum basefor veneer plasters.4. Physical Properties4.1 Joint StrengthGypsum veneer plaster systems appliedin accordance with Specification C843 shall be tested inaccordance with 5.9. The breaking load shall be not less thanthe parallel to sur
10、facing loads specified in Specification C1396/C1396M.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 ven
11、eer plaster systems shallnot crack or lose bond 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. (
12、13 mm) from the break line at failure whentested 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 C1396/C1396M.5.2 SamplingSample not less than 1 % of the packag
13、es,but not less than 5 packages. Select packages to be sampled atrandom. Take samples both from the outer portion and the1This 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 S
14、pecifications and Test Methods for Gypsum Products.Current edition approved April 1, 2014. Published April 2014. Originallyapproved in 1966. Last previous edition approved in 2009 as C587 04 (2009).DOI: 10.1520/C0587-04R14.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orconta
15、ct ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Co
16、nshohocken, PA 19428-2959. United States1center of each package. Thoroughly mix the materials soobtained to provide a composite sample of not less than 15 lb(6.8 kg). Place this composite sample immediately in a clean,dry, airtight container for delivery to the laboratory.5.3 Test Unit PreparationFr
17、om the sample, prepare panelsof veneer plaster system and cut four 2 ft (600 mm) square, andthree 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 in
18、dividu-ally after constant weight is reached.NOTE 2Laboratory test 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
19、 from the conditioningchamber.5.5 Number of TestsRun each test in triplicate.5.6 Bond Strength:5.6.1 Significance and UseThe bond strength test is de-signed to evaluate the bond of veneer plaster to veneer plasterbase and between the base coat and finish coat. The degree ofcorrelation between these
20、test methods and service perfor-mance has not been determined.5.6.2 ProcedureSelect 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 s
21、ample passes or fails thebond test. The sample fails if the bond to the 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 nonquanti
22、tative.5.7 Impact Strength:5.7.1 Significance and UseThe impact strength 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 stan
23、d with a solid, flat base at least 2 ft (600 mm)square with a means of holding the steel ball and releasing itfrom a height of 36 in. above the base, without impartingadditional force.5.7.2.2 A112 in. (38 mm) diameter polished steel ballweighing 7.8 6 0.1 oz (221 6 3 g).5.7.3 ProcedureSelect one 2 f
24、t (600 mm) square. Placethe specimen horizontally, with the plaster surface 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 bon
25、d orcracking beyond the impact area on any one of the drops.5.7.5 Precision 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 res
26、istance to cracking and bond of theveneer plaster to the veneer plaster 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 Test Meth-ods C473 for Method B.5.8.3 ProcedureSelect three
27、12 by 16 in. (300 by 400 mm)specimens. Subject each specimen to a continuous, midpoint,loading applied at a rate of 1 in./min 6 5 s (25 mm/min 6 5s) downward to the back of the panel (plaster surface intension) supported over a clear span of 14 in. (356 mm) untilfailure.5.8.4 ReportReport whether th
28、e sample passes or fails theflexure test. The sample fails if any one of 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
29、 test since thetest result is nonquantitative.5.9 Joint Strength:5.9.1 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 andserv
30、ice performance has not been determined.5.9.2 ApparatusUse the apparatus described in Test Meth-ods C473 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-b
31、ound edge. Place the two pieces of gypsum base forveneer plaster face down 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 ac
32、cordance with Specification C843 using themethod titled “Reinforcement Secured and Embedded withVeneer Plaster.”5.9.4 ProcedureCondition the specimen and determinethe flexural strength in accordance with Test Methods C473Method B.Apply the load parallel to and directly over the backof the joint.5.9.
33、5 ReportCalculate and report the average breakingload in pound-force or 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 C473.6. Inspection6.1 Inspection of the gypsum veneer plaster sh
34、all be agreedupon between the purchaser and the supplier as part of thepurchase agreement.7. Rejection and Rehearing7.1 Rejection of gypsum veneer plaster that fails to conformto the requirements of this specification shall be reported to theC587 04 (2014)2producer or supplier promptly and in writin
35、g. The notice ofrejection shall contain a statement documenting how thegypsum 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 c
36、ertifying that the product is in compliance with thisspecification.9. Packaging 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
37、suitablesize attached thereto:9.2.1 Name of producer or supplier,9.2.2 Brand,9.2.3 Description, and9.2.4 Net or gross weight, or both, of package.10. Keywords10.1 gypsum; gypsum veneer plaster; plaster; veneer plasterASTM International takes no position respecting the validity of any patent rights a
38、sserted 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 responsibility.This standard is subject to revision at any time
39、 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 addressed to ASTM International Headquarters. Your comments will re
40、ceive 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 address shown below.This standard is copyrighted by ASTM In
41、ternational, 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/).C587 04 (2014)3
