1、Designation:C176412(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 oforiginal a
2、doption 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 applications of
3、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 system shall be
4、 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 establish appro-priate
5、 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,Skylights and Curtain
6、 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 Hydroxide Solution2.2 ICC-ES A
7、cceptance 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)material used as abase for Portl
8、and 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.The series of tests described
9、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:4.2.1 This test determines the
10、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.This test method determines the ul
11、timate 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 the plaster basesmust be such that i
12、t 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 that the minimumembedment is obtained.
13、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 Accessories andRelated Products.Current edition
14、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 serviceastm.org.For Annual Book of ASTMStandards v
15、olume 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 States1 4.5.1 The non metallic lath is secured to the building frameor substrate with fasteners.This test evaluates
16、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 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 Load:6.1.1 Construct three test specimens
