ASTM_C_926_-_17.pdf

Designation:C92617Standard Specification forApplication of Portland Cement-Based Plaster1This standard is issued under the fixed designation C926;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 indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification covers the requirements for the appli-cation of full thickness portland cement-based plaster forexterior(stucco)and interior work.These requirements do notby default define a unit of work or assign responsibility forcontractual purposes,which is the purview of a contract orcontracts made between contracting entities.1.2 This specification sets forth tables for proportioning ofvarious plaster mixes and plaster thickness.NOTE1General information will be found in Annex A1.Designconsiderations will be found in Annex A2.1.3 The values stated in inch-pound units are to be regardedas the standard.The SI(metric)values given in parentheses areapproximate and are provided for information purposes only.1.4 The text of this specification references notes andfootnotes that provide explanatory material.These notes andfootnotes(excluding those in tables and figures)shall not beconsidered as requirements of the specification.1.5 Details of construction for a specific assembly toachieve the required fire resistance shall be obtained fromreports of fire-resistance tests,engineering evaluations,orlistings from recognized fire testing laboratories.2.Referenced Documents2.1 ASTM Standards:2C11 Terminology Relating to Gypsum and Related BuildingMaterials and SystemsC25 Test Methods for Chemical Analysis of Limestone,Quicklime,and Hydrated LimeC35 Specification for Inorganic Aggregates for Use in Gyp-sum PlasterC91 Specification for Masonry CementC150 Specification for Portland CementC206 Specification for Finishing Hydrated LimeC207 Specification for Hydrated Lime for Masonry Pur-posesC219 Terminology Relating to Hydraulic CementC260 Specification for Air-Entraining Admixtures for Con-creteC578 Specification for Rigid,Cellular Polystyrene ThermalInsulationC595 Specification for Blended Hydraulic CementsC631 Specification for Bonding Compounds for InteriorGypsum PlasteringC897 Specification for Aggregate for Job-Mixed PortlandCement-Based PlastersC932 Specification for Surface-Applied Bonding Com-pounds for Exterior PlasteringC1063 Specification for Installation of Lathing and Furringto Receive Interior and Exterior Portland Cement-BasedPlasterC1116 Specification for Fiber-Reinforced Concrete andShotcreteC1328 Specification for Plastic(Stucco)CementC1787 Specification for Installation of Non Metallic PlasterBases(Lath)Used with Portland Cement Based Plaster inVertical Wall ApplicationsE90 Test Method for Laboratory Measurement of AirborneSound Transmission Loss of Building Partitions andElementsE119 Test Methods for Fire Tests of Building Constructionand MaterialsE492 Test Method for Laboratory Measurement of ImpactSound Transmission Through Floor-Ceiling AssembliesUsing the Tapping Machine2.2 ANSI Standard:A108.1 Specification for Installation of Ceramic Tile33.Terminology3.1 Terms shall be defined as in Terminologies C11 andC219,except as modified herein.3.2 Definitions of Terms Specific to This Standard:1This specification is under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Materials and Systems and is the direct responsibilityof Subcommittee C11.03 on Specifications for theApplication of Gypsum and OtherProducts in Assemblies.Current edition approved Jan.1,2017.Published January 2017.Originallyapproved in 1981.Last previous edition approved in 2016 as C926 16c.DOI:10.1520/C0926-17.2For 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.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO 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 by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 3.2.1 accelerator,nan admixture that will shorten thesetting time of plaster.3.2.2 admixture,na material other than water,aggregate,or basic cementitious material added to the batch before orduring job mixing.3.2.3 acid etching,nthe cleansing and controlled erosionof a solid surface,using an acid wash.3.2.4 air entrainment,nthe use of an air-entraining a