1、Designation: C367/C367M 09Standard 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
2、 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.
3、In comparisonwith many building materials they may be relatively fragile. Materials are available that possessadequate strength and stability and at the same time provide good sound absorption. The test methodsdescribed here cover procedures for evaluating those physical properties related to streng
4、th. Themethods are of use in developing, manufacturing, and selecting acoustical tile or lay-in panels.It should be kept in mind that a property related to strength is only one of several considerationsimportant in judging the usefulness of an acoustical material. For example, a material judged to b
5、equite weak by one of these tests may still be desired for other reasons, and with adequate precautions,may be shipped and installed successfully.1. Scope1.1 These test methods cover the determination of thestrength properties of prefabricated architectural acoustical tileor lay-in ceiling panels as
6、 follows:Tests SectionsHardness 4 to 9Friability 10 to 16Sag 17 to 23Transverse strength 24 to 301.2 Not all of the tests described in these test methods maybe necessary to evaluate any particular product for a specificuse. In each instance, it will be necessary to determine whichproperties are requ
7、ired.1.3 These test methods specify procedures that may be usedin product 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 n
8、ecessarily 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 may not be exact equivalents; therefore, eachsystem shall be used independently of
9、the other. Combiningvalues from the two systems may result in non-conformancewith the standard.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 pr
10、actices 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
11、 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.1These test methods are under the jurisdiction of ASTM Committee E33 onBuilding and Environmental Acoustics and are the dir
12、ect responsibility of Subcom-mittee E33.04 on Application of Acoustical Materials and Systems.Current edition approved Oct. 15, 2009. Published January 2010. Originallyapproved in 1955. Last previous edition approved in 1999 as C367 99. DOI:10.1520/C0367-09.2For referenced ASTM standards, visit the
13、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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, Un
14、ited States.3.2.3 sagdeviation of the acoustical tile or panel at itsgeometric center from the plane formed by the edges.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 establi
15、shed 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 Sinc
16、e the hardness varies with the thickness, onlysamples of the same thickness may 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 % may be used. It shallbe equipped wit
17、h 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. Conditionin
18、g7.1 The strength properties of acoustical materials oftendepend on the moisture content at the time of the test.Therefore, condition materials for test under “room conditions”to constant weight (within 61 %) in an atmosphere maintainedat a relative humidity of 50 6 2 %, and a temperature of 73 62F
19、23 6 1C. State in the test report any departure from thisrecommended condition.8. Procedure8.1 Place the specimen in the conditioning chamber and letit remain until equilibrium is obtained.8.2 Place the specimen on a flat surface under the loadingpenetrator of the test machine. Force the penetrator
20、into thespecimen 0.25 6 0.01 in. 6.5 6 0.3 mm below the originalsurface (Note 1) at a rate of 0.10 in./min 2.5 mm/min(Note 2).NOTE 1The original surface is defined as the point where thepenetrator first contacts the specimen.NOTE 2When possible, the penetrator should bear between perfora-tions or fi
21、ssures when testing perforated or fissured material.8.3 Record the load shown on the testing machine when thepenetrator reaches the specified depression as the hardness ofthe specimen in newtons or pounds-force newtons.9. Report9.1 The report shall include the following:9.1.1 Identification of the t
22、est material,9.1.2 Method of conditioning including time of condition-ing, temperature, F or C , and relative humidity, %,9.1.3 Statement describing whether the finished or unfin-ished surface was tested and whether the face or the back of thespecimen was tested,9.1.4 Average thickness for the five
23、specimens, in. or mm,9.1.5 Individual thicknesses for each of the five specimens,in. or mm,9.1.6 Average hardness for the five specimens, lbf or N,and9.1.7 Individual hardness for each of the five specimens, lbfor N.FRIABILITY10. Significance and Use10.1 The friability test measures the susceptibili
24、ty of anacoustical product to edge and corner damage that might besustained during shipping, handling, and installing. Productsthat are friable and soft may erode considerably when sub-jected to rough treatment.11. Apparatus11.1 Balance, accurate to within 0.5 % of the weight of thesmallest specimen
25、 tested.11.2 Testing Container, consisting of an oak box with insidedimensions of 734 in. 200 mm square by 712 in. 190 mmdeep and fitted with a cover on one end for inserting andremoving the specimens. The box shall be mounted so that itmay be rotated at 60 62 r/min on a horizontal axis that isperpe
26、ndicular to its square dimension.11.3 Red or White Oak Cubes, 24,34 6132 in. 19 6 1 mmon an edge, having a specific gravity of 0.65 6 0.02.NOTE 3Number each group of wood cubes 1 to 24. At the end ofevery 600-revolution test period, remove one “used” cube (follow thenumber sequence and remove and di
27、scard the oldest cube) and replacewith a corresponding numbered “new” cube. In this manner, cube wear iseliminated as an uncontrolled variable in the test method. When thecorners of the wood cubes have been worn so that the radius of curvatureis greater than116 in. 1.5 mm or the cubes have become al
28、tered so as notto be comparable with new cubes, they shall be discarded and new onesused. A conventional machinists radius gage may be used for checkingthe cube edge wear.11.4 Timer, consisting of a watch or clock capable ofmeasuring intervals of 10 min within 6 5.0 s.12. Test Specimens12.1 Cut twel
29、ve 1 by 1 in. 25 by 25 mm square specimensfrom a single tile or panel. The specimen thickness is equal tothe tile or panel thickness.NOTE 4If the friability of original edges is of importance, separatetests should be run on 1 by 1 in. 25 by 25 mm specimens having one ortwo original edges.13. Conditi
30、oning13.1 Maintain standard conditions as described in 7.1 dur-ing preparation and testing of specimens.14. Procedure14.1 Weigh the twelve specimens and record the combinedweight to the nearest 0.1 g.C367/C367M 09214.2 Place the 12 specimens and the 24 oak cubes in thetesting container. Close the to
31、p of the testing container androtate the container about its axis at a speed of 60 rpm for two10 min periods. At the end of each 10 min period, remove thespecimens from the box and determine the percentage of massloss, due to pulverization and breakage. In the case of badlyabraded specimens, remove
32、up to twelve of the largest piecesremaining and weigh these for the determination. In rare cases,no pieces may remain from an individual specimen. In thiscase, the weight loss shall be reported as 100 %.15. Calculation15.1 Calculate the percent mass loss for the 10 min and 20min periods to two signi
33、ficant figures using Eq 1mass loss,%5 M12 M2!/M1#100 (1)M1 = original mass, g, andM2 = mass after 10 min period and mass after 20 minperiod.16. Report16.1 The report shall include the following:16.1.1 Identification of the test material,16.1.2 Method of conditioning including time of condition-ing,
34、temperature, F or C , and relative humidity, %, and16.1.3 Percentage mass loss for the 10 and 20 min periods.SAG17. Significance and Use17.1 This test method is for the purpose of determining thesag properties of ceiling tile or panels under various conditionsof humidity exposure. Tiles or panels of
35、 various sizes can betested by using appropriately sized supporting frames.17.2 The test method will provide both the initial reading inreference to the plane of the edge support system and the totalhumidity-induced sag.17.3 This test method is not designed to establish theexpected performance of th
36、e ceiling panels under field condi-tions of use, but only the sag properties for the specifictemperature, humidity, exposure time, and mounting condi-tions used in the test.18. Apparatus18.1 Controlled-Atmosphere Chamber (EnvironmentalChamber), capable of operating at a dry-bulb temperature of 73to
37、90 6 3F 23.0 to 32.0 6 1.5C, and relative humidities of50, 60, 70, 80, or 90 6 2 %. The chamber should be equippedwith suitable recording equipment to record wet- and dry-bulbtemperatures (or dry bulb and relative humidity). This equip-ment shall be checked periodically and calibrated with apsychrom
38、eter that shall also be used to establish the testconditions.18.2 Sample Test Frames and Racks, fabricated from non-ferrous metal, such as aluminum, and of suitable lineardimensions as shown in Fig. 1. Frames shall be constructed of14 by 112 in. 6 by 38 by 38-mm angle with miter-cut corners.Inside s
39、urfaces of corners shall be welded and ground smooth.Frames shall be fabricated so they are level and square. Overallinside dimensions of the frames shall be such that the panels donot touch the vertical edges of the frame if they expand underprolonged exposure to conditions of high humidity.18.2.1
40、Racks may be constructed of a convenient design tohold one or more test frames in a horizontal plane; however, asufficient distance shall be maintained between frames topermit adequate circulation of the test atmosphere and permittest measurements without moving panels.18.3 Zero-Plane PlateIn the ev
41、ent that measurements aremade using the zero-plane plate, means of zeroing the dialindicator (Note 5), a zero-plane plate fabricated of14 in.6-mm thick by 3 in. 80 mm wide steel or aluminum stock,shall be provided. The length of the plate shall be14 in. 6 mmless than the inside width of the test fra
42、me.NOTE 5In the case of panels with a width of 24 in. 610 mm or less,an alternative means of zeroing the sag bar dial indicator may be used.This consists of placing a zero-plane plate in the test specimen frameparallel with the shortest member of the frame, and centered in the longestmember of the f
43、rame. The sag bar is then placed beneath the frame and thedial gage is adjusted to read zero at the plane of the specimen surface.18.4 Sag Bar, equipped with a dial or digital gage indicatorhaving a minimum movement of 1 in. 25 mm calibrated inincrements of 0.001 in. 0.025 mm or less. The indicator
44、shallbe equipped with a 0.50 in. 13 mm diameter pressure foot.The bar shall be equipped with individually adjustable feethaving34 in. 20 mm diameter bearing surfaces. The distancebetween centers of the bearing surfaces shall be equal to thenominal width of the test panel or tile. Fig. 2 shows a suit
45、ablesag bar design including spacing between bearing surfaces.19. Test Specimens19.1 Test specimens shall be full-size tile or panels asshipped for installation in the field.20. Conditioning20.1 Condition specimens as described in 7.1 prior toplacing in the controlled atmosphere chamber for sag test
46、ing.21. Procedure21.1 Adjust the chamber controls to provide one of thetemperature and humidity conditions selected from those listedin 18.1.21.2 Place the sag bar on a flat surface, such as a rigidaluminum bar of a length appropriate to the size of the sag bar(Note 5).21.3 Adjust the gage indicator
47、 to read the thickness of thetest frame angle. This will provide an indication of 0 in. 0 mmwhen the indicator foot is in the plane of the test panelsupporting surface.21.4 Mark the geometric center of the tile or panel on thefinished surface at the intersection of diagonals drawn fromcorner to corn
48、er.21.5 Install the tile or panel in the test rack within theenvironmental chamber with the finished surface facing down.21.6 Record the gage reading as the “initial reading.”C367/C367M 093FIG. 1 Sag Test FramePanel Minimum Linear Dimension,in. mmDimension A, in. mm12 305 6 15024 610 12 30548 1220 2
49、4 61060 1525 30 760FIG. 2 Sag BarC367/C367M 09421.7 Place the sag bar under the test panel or tile with thesag bar feet pressed firmly into contact with the horizontalmembers of the frame and with the bar parallel with theshortest (if not symmetrical) members of the frame. The feetshould be positioned at the center of the span of the longestframe member and the gage foot should be located at the panelor tile center as marked in 21.4.21.8 Adjust the environmental chamber
