ASTM_C_367_-_C_367M_-_16.pdf

Designation:C367/C367M16Standard Test Methods forStrength Properties of Prefabricated ArchitecturalAcoustical Tile or Lay-In Ceiling Panels1This standard is issued under the fixed designation C367/C367M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.INTRODUCTIONMaterials used for absorbing sound generally have a porous,low-density structure.In comparisonwith many building materials they are relatively fragile.Materials are available that possess adequatestrength and stability and at the same time provide good sound absorption.The test methods describedhere cover procedures for evaluating those physical properties related to strength.The methods are ofuse in developing,manufacturing,and selecting acoustical tile or lay-in panels.Keep in mind that a property related to strength is only one of several considerations important injudging the usefulness of an acoustical material.For example,a material judged to be quite weak byone of these tests is still desired for other reasons,and with adequate precautions,is shipped andinstalled successfully.1.Scope1.1 These test methods cover the determination of thestrength properties of prefabricated architectural acoustical tileor lay-in ceiling panels as follows:TestsSectionsHardness4 to 9Friability10 to 16Sag17 to 23Transverse strength24 to 301.2 Not all of the tests described in these test methods arenecessary to evaluate any particular product for a specific use.In each instance,it is necessary to determine which propertiesare required.1.3 These test methods specify procedures that are used inproduct development,manufacturing control,specificationacceptance,and service evaluation.1.4 Properties determined by these test methods reflect theperformance of the materials under the specific conditions ofthe test,and do not necessarily indicate performance underconditions other than those specified herein.1.5 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system are not exact equivalents;therefore,each systemshall be used independently of the other.Combining valuesfrom the two systems will result in non-conformance with thestandard.1.6 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 safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards2C634 Terminology Relating to Building and EnvironmentalAcoustics3.Terminology3.1 Terms defined in Terminology C634.3.1.1 acoustical material3.1.2 sound absorption3.2 Definitions of Terms Specific to This Standard:3.2.1 fissuresirregular depressions of varying lengthswidths,and depths extending below the basic product face.3.2.2 friableeasily crumbled.3.2.3 sagdeviation of the acoustical tile or panel at itsgeometric center from the plane formed by the edges.1These test methods are under the jurisdiction of ASTM Committee E33 onBuilding and Environmental Acoustics and are the direct responsibility of Subcom-mittee E33.04 on Application of Acoustical Materials and Systems.Current edition approved May 1,2016.Published June 2016.Originallyapproved in 1955.Last previous edition approved in 2009 as C367/C367M 09.DOI:10.1520/C0367_C0367M-16.2For 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,PO Box C700,West Conshohocken,PA 19428-2959.United States1 HARDNESS4.Significance and Use4.1 Knowledge of hardness is useful in the development andthe quality control of acoustical tile and lay-in ceiling panels.Deviation from an established hardness range will assist inpointing out processing errors or defective raw materials,thereby aiding the maintenance of uniform product quality.4.2 This property is also useful in comparing the relativeabilities of materials to resist indentations on the panel surfacecaused by impacts.4.3 Since the hardness varies with the thickness,onlysamples of the same thickness shall be directly compared.5.Apparatus5.1 Testing MachineAny standard mechanical or hydrau-lic testing machine capable of applying and measuring therequired load within an accuracy of 61%shall be used.It shallbe equipped with a 2.00 in.50.8 mm diameter metal ball,orhemispherically shaped penetrator that bears upon the speci-men surface.6.Test Specimens6.1 Cut five 4 by 4 in.100 by 100 mm specimens from asingle tile or panel.Cut the five specimens from representativeareas of the tile or ceiling panel.7.Con