1、Designation: C1764 12 (Reapproved 2018)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, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles
6、 for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C926 Specification for Application of Portland Cement-Based PlasterE330/E330M Test Method for Struc
7、tural Performance ofExterior Windows, Doors, Skylights and Curtain Walls byUniform Static Air Pressure DifferenceE631 Terminology of Building ConstructionsE2098/E2098M Test Method for Determining TensileBreaking Strength of Glass Fiber Reinforcing Mesh forUse in Class PB Exterior Insulation and Fini
8、sh Systems(EIFS), after Exposure to a Sodium Hydroxide 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
9、Standard:3.2.1 non metallic, plaster base (lath)material 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 var
10、iety of conditions over the claddings service life.The 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
11、 exposures for a given project.4.2 Transverse Load:4.2.1 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 result
12、s in a vertical load transfer to theplaster base. This 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
13、. Thethickness, profile, and material properties of the plaster basesmust be such that it is adequately embedded in the PortlandCement Based Plaster. This can be accomplished through use1These test methods are under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Materials and S
14、ystems and is the direct responsibilityof Subcommittee C11.02 on Specifications and Test Methods for Accessories andRelated Products.Current edition approved Oct. 1, 2018. Published October 2018. Originallyapproved in 2012. Last previous edition approved in 2016 as C1764 12 (2016).DOI: 10.1520/C1764
15、-12R18.2For 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.Copyright ASTM International, 100 Barr Harbor Drive, P
16、O Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued
17、by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1of 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 that the minimumembedment is obtained.4.5 Fastener Pull T
18、hrough Resistance:4.5.1 The non metallic lath is secured to the building frameor substrate with fasteners. This test evaluates the fastenerattachment effectiveness.4.6 Alkali Resistance (Glass Fiber Lath Only):4.6.1 Per E2098/E2098M.5. Sampling, Test Specimens, and Test Units5.1 The number, size and
19、 configuration of the test speci-mens shall be as per each test procedure with the 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
20、Load:6.1.1 Construct three test specimens. Test specimen sizeshall be minimum 4 by 8 ft (1.2 by 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 theconfiguratio
21、n of the test specimen.6.2 Vertical Load:6.2.1 Construct three test frames measuring 12 by 20 in.(305 by 508 mm) using nominal 2 by 4 in. (50 by 100 mm)wood lumber with specific gravity of 0.42. The test frame shallhave one intermediate stud with top and bottom plates andsheathed one side with12 in.
22、 (13 mm) thick gypsum sheathing.Attach studs to plates using 2 16d (312 in. (89 mm) length)nails and sheathing to framing using 6d (2 in. length) commonnails or equal fastened 8 in. (200 mm) on center. A test panelshall be prepared measuring 6 in. (152 mm) high by 16 in. (406mm) wide and consisting
23、of a water-resistive barrier (providedto prevent adhesion of the test panel to the test frame); nonmetallic plaster base, which is attached through the water-resistive barrier to the intermediate framing member with onefastener; and apply Portland Cement Based Plaster per C926.The samples shall be c
24、ured a minimum of 28 days. Refer toFig. 1 for an illustration of the test assembly.6.3 Embedment:6.3.1 Construct one test frame using nominal 2 by 4 in. (50by 100 mm) wood lumber with specific gravity of 0.42 unlessspecified otherwise by the manufacturer. The test frame shallbe 48 in. (1.2 m) wide a
25、nd high studs spaced 16 in. (406 mm)on center, wood plates top and bottom and sheathed withminimum12 in. (13 mm) thick wood based sheathing. Twolayers of a water resistive barrier shall be attached to thesheathing using staples 12 in. (305 mm) on center around thepanel perimeter. A plaster stop or g
26、rounds shall be fastenedaround the panel perimeter. Apply the non metallic lath to thesample with one horizontal lap and fastened to the stud per themanufacturers recommendations. Apply the scratch and brownPortland Cement Based Plaster per C926.6.4 Fastener Pull Through Resistance:6.4.1 Construct f
27、ive test frames using nominal 2 by 4 in. (50by 100 mm) wood framing with specific gravity of 0.42 andany other types of framing as specified by the non metallic lathmanufacturer. The test frame shall be 12 in. (305 mm) wide andsufficient height to permit placement of three or more lathfasteners. One
28、 stud centered in the panel and sheathed one sidewith12 in. (13 mm) thick gypsum sheathing. Two layers of awater resistive barrier shall be attached to the sheathing usingstaples 12 in. (305 mm) on center around the panel perimeter.A plaster stop or grounds shall be fastened around the panelperimete
29、r. Apply the lath to the sample with one horizontal lapand fastened to the stud per the manufacturers recommenda-tions. Apply the Portland Cement Based Plaster per C926.Allow the stucco to cure and remove the sheathing that existsbetween the wood framing.6.5 Alkali Resistance (Glass Fiber Lath Only)
30、: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 conditioned specimens. A
31、llspecimens were 2 in. (50 mm) wide by 12 in. (305 mm) long.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 specimenuniformly to
32、 test conditions described in Test Method E330/E330M Procedure 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 Alkali Resistanc
33、e (Glass Fiber Lath Only):7.5.1 The apparatus shall be capable of subjecting specimenuniformly to test conditions described in Test Method E2098/E2098M.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 test spec
34、imens 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.C1764 12 (2018)28.5 Alkali Resistance (Glass
35、 Fiber Lath Only):8.5.1 In accordance with Test Method E2098/E2098M.9. Procedure9.1 Transverse Load:9.1.1 In accordance with Test Method E330/E330M Proce-dure A. Terminate test when specified pressure can not bemaintained due to failure of the test specimen.9.2 Vertical Load:9.2.1 Apply vertical, do
36、wnward load uniformly across 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 botto
37、m stud such that thecross 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 ri
38、gid jig to assure each fastenerwill 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
39、 Lath Only):9.5.1 In accordance with Test Method E2098/E2098M.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.FIG. 1 Test AssemblyC1764 12 (2018)310
40、.1.3 Reference to the test standard including any devia-tions.10.1.4 Description and identification of the non metallic lathsample including manufacturer, type and thickness of thestucco, construction details, dimensions, framing, sheathing,application instruction and other pertinent information nee
41、dedto describe the specimens.10.1.5 Specifics required 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
42、 of the test methods inthis standard have been determined.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 stan
43、dard 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 and
44、if 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 receive careful consideration at a meeting of theresponsible technical committee, w
45、hich 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
46、,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 Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 12 (2018)4
