1、Designation: C1764 12 (Reapproved 2016)Standard Test Methods forNon Metallic Plaster Bases (Lath) Used with PortlandCement Based Plaster in Vertical Wall Applications1This standard is issued under the fixed designation C1764; the number immediately following the designation indicates the year oforig
2、inal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 These test methods evaluate the performance of verticalwall app
3、lications of non metallic plaster bases used withPortland Cement Based Plaster under a variety of test expo-sures.1.2 UnitsThe values stated in either SI units or inch-pound units are to be regarded separately as standard. Thevalues stated in each system may not be exact equivalents;therefore, each
4、system shall be used independently of the other.Combining values from the two systems may result in non-conformance with the standard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to esta
5、blish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C926 Specification for Application of Portland Cement-Based PlasterE330 Test Method for Structural Performance of ExteriorWindows, Doors,
6、Skylights and Curtain Walls by UniformStatic Air Pressure DifferenceE631 Terminology of Building ConstructionsE2098 Test Method for Determining Tensile BreakingStrength of Glass Fiber Reinforcing Mesh for Use in ClassPB Exterior Insulation and Finish Systems (EIFS), afterExposure to a Sodium Hydroxi
7、de Solution2.2 ICC-ES Acceptance Criteria:AC 191 Acceptance Criteria for Metal Plaster Bases (Lath)3. Terminology3.1 DefinitionsFor definitions of terms used in these testmethods, refer to Terminology E631.3.2 Definitions of Terms Specific to This Standard:3.2.1 non metallic, plaster base (lath)mate
8、rial used as abase for Portland Cement Based Plaster that is flat or selffurred.4. Significance and Use4.1 General:4.1.1 Non metallic reinforced Portland Cement Based Plas-ter are vertically applied exterior wall claddings that may besubject to variety of conditions over the claddings service life.T
9、he series of tests described in this standard evaluates perfor-mance under a variety of test conditions and exposures. Anygiven project may not be subject to all of the test conditionsdescribed herein and all of the test methods may not evaluateall exposures for a given project.4.2 Transverse Load:4
10、.2.1 This test determines the ultimate wind load resistanceof the wall assembly including influence of the framing,sheathing, and means of attachment.4.3 Vertical Load:4.3.1 The weight and attachment mechanism of PortlandCement Based Plaster results in a vertical load transfer to theplaster base. Th
11、is test method determines the ultimate verticalload capacity of the cladding assembly based on taking thespecimen to failure.4.4 Embedment:4.4.1 Plaster bases serve as a key, reinforcement and attach-ment mechanism for Portland Cement Based Plaster. Thethickness, profile, and material properties of
12、the plaster basesmust be such that it is adequately embedded in the PortlandCement Based Plaster. This can be accomplished through useof a self furred non metallic plaster base or other means suchas furring strips. This test procedure determines the effective-ness of the furring mechanism to ensure
13、that the minimumembedment is obtained.4.5 Fastener Pull Through Resistance:1These test methods are under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Materials and Systems and is the direct responsibilityof Subcommittee C11.02 on Specifications and Test Methods for Accessorie
14、s andRelated Products.Current edition approved Sept. 1, 2016. Published September 2016. Originallyapproved in 2012. Last previous edition approved in 2012 as C1764 12. DOI:10.1520/C1764-12R16.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at ser
15、viceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.5.1 The non metallic lath is secured to the building
16、frameor substrate with fasteners. This test evaluates the fastenerattachment effectiveness.4.6 Alkali Resistance (Glass Fiber Lath Only):4.6.1 Per E2098.5. Sampling, Test Specimens, and Test Units5.1 The number, size and configuration of the test speci-mens shall be as per each test procedure with t
17、he exception ofTransverse Load tests which shall incorporate wood or steelframing as determined by the user. Samples shall be represen-tative of standard products and construction methods.6. Test Specimens6.1 Transverse Load:6.1.1 Construct three test specimens. Test specimen sizeshall be minimum 4
18、ft (1.2 m) by 8 ft (2.4 m) and constructedrepresentative of end use conditions. Framing members shallbe wood or steel as determined by the user. C926 PortlandCement Based Plaster shall be mixed and applied in theconfiguration of the test specimen.6.2 Vertical Load:6.2.1 Construct three test frames m
19、easuring 12 inch (305mm) by 20 inch (508 mm) using nominal 2 inch (50 mm) by4 inch (100 mm) wood lumber with specific gravity of 0.42.The test frame shall have one intermediate stud with top andbottom plates and sheathed one side with12 inch (13 mm) thickgypsum sheathing. Attach studs to plates usin
20、g 2 16d (312 inch(89 mm) length) nails and sheathing to framing using 6d (2inch length) common nails or equal fastened 8 inches (200mm) on center. A test panel shall be prepared measuring 6inches (152 mm) high by 16 inches (406 mm) wide andconsisting of a water-resistive barrier (provided to prevent
21、adhesion of the test panel to the test frame); non metallicplaster base, which is attached through the water-resistivebarrier to the intermediate framing member with one fastener;and apply Portland Cement Based Plaster per C926. Thesamples shall be cured a minimum of 28 days. Refer to Fig. 1FIG. 1 T
22、est AssemblyC1764 12 (2016)2for an illustration of the test assembly.6.3 Embedment:6.3.1 Construct one test frame using nominal 2 inch (50mm) by 4 inch (100 mm) wood lumber with specific gravity of0.42 unless specified otherwise by the manufacturer. The testframe shall be 48 inches (1.2 m) wide and
23、high studs spaced 16inches (406 mm) on center, wood plates top and bottom andsheathed with minimum12 inch (13 mm) thick wood basedsheathing. Two layers of a water resistive barrier shall beattached to the sheathing using staples 12 inches (305 mm) oncenter around the panel perimeter. A plaster stop
24、or groundsshall be fastened around the panel perimeter. Apply the nonmetallic lath to the sample with one horizontal lap and fastenedto the stud per the manufacturers recommendations. Apply thescratch and brown Portland Cement Based Plaster per C926.6.4 Fastener Pull Through Resistance:6.4.1 Constru
25、ct five test frames using nominal 2 inch (50mm) by 4 inch (100 mm) wood framing with specific gravityof 0.42 and any other types of framing as specified by the nonmetallic lath manufacturer. The test frame shall be 12 inches(305 mm) wide and sufficient height to permit placement ofthree or more lath
26、 fasteners. One stud centered in the panel andsheathed one side with12 inch (13 mm) thick gypsumsheathing. Two layers of a water resistive barrier shall beattached to the sheathing using staples 12 inches (305 mm) oncenter around the panel perimeter. A plaster stop or groundsshall be fastened around
27、 the panel perimeter. Apply the lath tothe sample with one horizontal lap and fastened to the stud perthe manufacturers recommendations. Apply the Portland Ce-ment Based Plaster per C926. Allow the stucco to cure andremove the sheathing that exists between the wood framing.6.5 Alkali Resistance (Gla
28、ss Fiber Lath Only):6.5.1 Ten specimens in the warp and ten specimens in theweft directions should be cut from the roll glass fiber lath andlabeled as control specimens. Ten specimens in the warp andten specimens in the weft directions should be cut from the rollglass fiber lath and labeled as condi
29、tioned specimens. Allspecimens were 2 (50 mm) inch wide by 12 (305 mm) inchlong.7. Apparatus7.1 The description of apparatus in this section is general innature consequently any set up capable of performing the testis acceptable.7.2 Transverse Load:7.2.1 The apparatus shall be capable of subjecting
30、specimenuniformly to test conditions described in Test Method E330Procedure A.7.3 Vertical Load:7.3.1 Universal testing machine with capabilities to accom-modate section 9.2.1.7.4 Fastener Pull Through Resistance:7.4.1 Universal testing machine with capabilities to accom-modate section 9.4.1.7.5 Alk
31、ali Resistance (Glass Fiber Lath Only):7.5.1 The apparatus shall be capable of subjecting specimenuniformly to test conditions described in Test Method E2098.8. Conditioning8.1 Transverse Load:8.1.1 Cure test specimens 28 days under ambient conditionsprior to testing.8.2 Vertical Load:8.2.1 Cure tes
32、t specimens 28 days under ambient conditionsprior to testing.8.3 Embedment:8.3.1 Cure test specimens 28 days under ambient conditionsprior to testing.8.4 Fastener Pull Through Resistance:8.4.1 Cure test specimens 28 days under ambient conditionsprior to testing.8.5 Alkali Resistance (Glass Fiber Lat
33、h Only):8.5.1 In accordance with Test Method E2098.9. Procedure9.1 Transverse Load:9.1.1 In accordance with Test Method E330 Procedure A.Terminate test when specified pressure can not be maintaineddue to failure of the test specimen.9.2 Vertical Load:9.2.1 Apply vertical, downward load uniformly acr
34、oss en-tire width of specimen, at a rate of one inch/minute until failureusing a universal testing machine. Record deflection, resultsand failure mechanism.9.3 Embedment:9.3.1 Cut the test panel diagonally from the intersection ofthe top stud to the intersection of the bottom stud such that thecross
35、 section of the Portland Cement Plaster is visible. Measureeach strand with respect to its embedment in the PortlandCement Plaster. Make all from the back plane of the nonmetallic lath to the back plane of the plaster.9.4 Fastener Pull Through:9.4.1 Place center stud in a rigid jig to assure each fa
36、stenerwill receive equivalent loads. Apply load in tension by pullingthe center stud away from the plaster surface uniformly usinga universal testing machine, at a rate of two inches/minute untilfailure. Record results and failure mechanism.9.5 Alkali Resistance (Glass Fiber Lath Only):9.5.1 In acco
37、rdance with Test Method E2098.10. Report10.1 Reports shall include the following information:10.1.1 Name, address and telephone number of the labora-tory.10.1.2 Date of test, date of report, and test report identifi-cation number.10.1.3 Reference to the test standard including any devia-tions.10.1.4
38、 Description and identification of the non metallic lathsample including manufacturer, type and thickness of theC1764 12 (2016)3stucco, construction details, dimensions, framing, sheathing,application instruction and other pertinent information neededto describe the specimens.10.1.5 Specifics requir
39、ed by the standard including ambientconditions, photographs, illustrations, and calculations.10.1.6 Test reports shall be signed and include observations,failure mode, as well as conclusions.11. Precision and Bias11.1 Neither the precision nor bias of the test methods inthis standard have been deter
40、mined.12. Keywords12.1 lath; non metallic plaster base; portland cement basedplasterASTM 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
41、 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 not revised, either reapproved or withdrawn. Your
42、 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 you may attend. If you feel that your comments
43、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 multi
44、ple 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 Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 12 (2016)4
