1、Designation: C367/C367M 09C367/C367M 16Standard 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 ad
2、option 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-densit
3、y structure. In comparisonwith many building materials they may be are 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
4、related to strength. Themethods are of use in developing, manufacturing, and selecting acoustical tile or lay-in panels.It should be kept Keep in mind that a property related to strength is only one of severalconsiderations important in judging the usefulness of an acoustical material. For example,
5、a materialjudged to be quite weak by one of these tests mayis still be desired for other reasons, and with adequateprecautions, may be is shipped and installed successfully.1. Scope1.1 These test methods cover the determination of the strength properties of prefabricated architectural acoustical til
6、e or lay-inceiling panels as 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 may be are necessary to evaluate any particular product for a specificuse. In each instance, it will be is necessary t
7、o determine which properties are required.1.3 These test methods specify procedures that may be are used in product development, manufacturing control, specificationacceptance, and service evaluation.1.4 Properties determined by these test methods reflect the performance of the materials under the s
8、pecific conditions of the test,and do not necessarily indicate performance under conditions other than those specified herein.1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem mayare not be exact equivalents; there
9、fore, each system shall be used independently of the other. Combining values fromthe two systems maywill result in non-conformance with the standard.1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this
10、standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards2C634 Terminology Relating to Building and Environmental Acoustics1 These test methods are under the jurisdiction of ASTM Commi
11、ttee E33 on Building and Environmental Acoustics and are the direct responsibility of SubcommitteeE33.04 on Application of Acoustical Materials and Systems.Current edition approved Oct. 15, 2009May 1, 2016. Published January 2010June 2016. Originally approved in 1955. Last previous edition approved
12、in 19992009 asC367 99.C367/C367M 09. DOI: 10.1520/C0367-09.10.1520/C0367_C0367M-16.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary pag
13、e on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that u
14、sers consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13. Terminology3.1 Terms de
15、fined 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 lengths widths, and depths extending below the basic product face.3.2.2 friableeasily crumbled.3.2.3 sagdeviation of the acoustic
16、al tile or panel at its geometric center from the plane formed by the edges.HARDNESS4. Significance and Use4.1 Knowledge of hardness is useful in the development and the quality control of acoustical tile and lay-in ceiling panels.Deviation from an established hardness range will assist in pointing
17、out processing errors or defective raw materials, thereby aidingthe maintenance of uniform product quality.4.2 This property is also useful in comparing the relative abilities of materials to resist indentations on the panel surface causedby impacts.4.3 Since the hardness varies with the thickness,
18、only samples of the same thickness mayshall be directly compared.5. Apparatus5.1 Testing MachineAny standard mechanical or hydraulic testing machine capable of applying and measuring the requiredload within an accuracy of 61 % mayshall be used. It shall be equipped with a 2.00 in. 50.8 mm diameter m
19、etal ball, orhemispherically shaped penetrator that bears upon the specimen surface.6. Test Specimens6.1 Cut five 4 by 4 in. 100 by 100 mm specimens from a single tile or panel. Cut the five specimens from representative areasof the tile or ceiling panel.7. Conditioning7.1 The strength properties of
20、 acoustical materials often depend 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 maintained at a relativehumidity of 50 6 2 %, and a temperature of 73 6 2F 23 6 1C. State in the test r
21、eport any departure from this recommendedcondition.8. Procedure8.1 Place the specimen in the conditioning chamber and let it remain until equilibrium is obtained.8.2 Place the specimen on a flat surface under the loading penetrator of the test machine. Force the penetrator into the specimen0.25 6 0.
22、01 in. 6.5 6 0.3 mm below the original surface (Note 1) at a rate of 0.10 in./min 2.5 mm/min(mm/min.Note 2).NOTE 1The original surface is defined as the point where the penetrator first contacts the specimen.NOTE 2When possible, the penetrator should bear between perforations or fissures when testin
23、g perforated or fissured material.8.2.1 When possible, the penetrator shall bear between perforations or fissures when testing perforated or fissured material.8.3 Record the load shown on the testing machine when the penetrator reaches the specified depression as the hardness of thespecimen in newto
24、ns or pounds-force newtons.9. Report9.1 The report shall include the following:9.1.1 Identification of the test material,9.1.2 Method of conditioning including time of conditioning, temperature, F or C , and relative humidity, %,9.1.3 Statement describing whether the finished or unfinished surface w
25、as tested and whether the face or the back of thespecimen was tested,9.1.4 Average thickness for the five 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
26、five specimens, lbf or N.C367/C367M 162FRIABILITY10. Significance and Use10.1 The friability test measures the susceptibility of an acoustical product to edge and corner damage that might be sustainedduring shipping, handling, and installing. Products that are friable and soft maywill erode consider
27、ably when subjected to roughtreatment.11. Apparatus11.1 Balance, accurate to within 0.5 % of the weight of the smallest specimen tested.11.2 Testing Container, consisting of an oak box with inside dimensions of 734 in. 200 mm square by 712 in. 190 mm deepand fitted with a cover on one end for insert
28、ing and removing the specimens. The box shall be mounted so that it maycan be rotatedat 60 62 r/min on a horizontal axis that is perpendicular to its square dimension.11.3 Red or White Oak Cubes, 24, 34 6 132 in. 19 6 1 mm on an edge, having a specific gravity of 0.65 6 0.02.NOTE 3Number each group
29、of wood cubes 1 to 24. At the end of every 600-revolution test period, remove one “used” cube (follow the numbersequence and remove and discard the oldest cube) and replace with a corresponding numbered “new” cube. In this manner, cube wear is eliminated asan uncontrolled variable in the test method
30、. When the corners of the wood cubes have been worn so that the radius of curvature is greater than 116 in.1.5 mm or the cubes have become altered so as not to be comparable with new cubes, they shall be discarded and new ones used. A conventionalmachinists radius gage may be used for checking the c
31、ube edge wear.11.3.1 Number each group of wood cubes 1 to 24. At the end of every 600-revolution test period, remove one “used” cube(follow the number sequence and remove and discard the oldest cube) and replace with a corresponding numbered “new” cube.In this manner, cube wear is eliminated as an u
32、ncontrolled variable in the test method. When the corners of the wood cubes havebeen worn so that the radius of curvature is greater than 116 in. 1.5 mm or the cubes have become altered so as not to becomparable with new cubes, they shall be discarded and new ones used. A conventional machinists rad
33、ius gage shall be used forchecking the cube edge wear.11.4 Timer, consisting of a watch or clock capable of measuring intervals of 10 min within 6 5.0 s.12. Test Specimens12.1 Cut twelve 1 by 1 in. 25 by 25 mm square specimens from a single tile or panel. The specimen thickness is equal to thetile o
34、r panel thickness.NOTE 4If the friability of original edges is of importance, separate tests should be run on 1 by 1 in. 25 by 25 mm specimens having one or twooriginal edges.12.2 If the friability of original edges is of importance, separate tests shall be run on 1 by 1 in. 25 by 25 mm specimens ha
35、vingone or two original edges.13. Conditioning13.1 Maintain standard conditions as described in 7.1 during preparation and testing of specimens.14. Procedure14.1 Weigh the twelve specimens and record the combined weight to the nearest 0.1 g.14.2 Place the 12 specimens and the 24 oak cubes in the tes
36、ting container. Close the top of the testing container and rotate thecontainer about its axis at a speed of 60 rpm for two 10 min periods.At the end of each 10 min period, remove the specimens fromthe box and determine the percentage of mass loss, due to pulverization and breakage. In the case of ba
37、dly abraded specimens,remove up to twelve of the largest pieces remaining and weigh these for the determination. In rare cases, no pieces may remainfrom an individual specimen. In this case, the weight loss shall be reported as 100 %.15. Calculation15.1 Calculate the percent mass loss for the 10 min
38、 and 20 min periods to two significant figures using Eq 1mass loss, %5M12M2!/M1#100 (1)M1 5 original mass, g, andM2 5 mass after 10 min period and mass after 20 min period.16. Report16.1 The report shall include the following:16.1.1 Identification of the test material,16.1.2 Method of conditioning i
39、ncluding time of conditioning, temperature, F or C , and relative humidity, %, andC367/C367M 16316.1.3 Percentage mass loss for the 10 and 20 min periods.SAG17. Significance and Use17.1 This test method is for the purpose of determining the sag properties of ceiling tile or panels under various cond
40、itions ofhumidity exposure. Tiles or panels of various sizes can be tested by using appropriately sized supporting frames.17.2 The test method will provide both the initial reading in reference to the plane of the edge support system and the totalhumidity-induced sag.17.3 This test method is not des
41、igned to establish the expected performance of the ceiling panels under field conditions of use,but only the sag properties for the specific temperature, humidity, exposure time, and mounting conditions used in the test.18. Apparatus18.1 Controlled-Atmosphere Chamber (Environmental Chamber), capable
42、 of operating at a dry-bulb temperature of 73 to 90 63F 23.0 to 32.0 6 1.5C, and relative humidities of 50, 60, 70, 80, or 90 6 2 %. The chamber shouldshall be equipped withsuitable recording equipment to record wet- and dry-bulb temperatures (or dry bulb and relative humidity). This equipment shall
43、be checked periodically and calibrated with a psychrometer that shall also be used to establish the test conditions.18.2 Sample Test Frames and Racks, fabricated from nonferrous metal, such as aluminum, and of suitable linear dimensions asshown in Fig. 1. Frames shall be constructed of 14 by 112 in.
44、 6 by 38 by 38-mm angle with miter-cut corners. Inside surfacesof corners shall be welded and ground smooth. Frames shall be fabricated so they are level and square. Overall inside dimensionsof the frames shall be such that the panels do not touch the vertical edges of the frame if they expand under
45、 prolonged exposureto conditions of high humidity.18.2.1 Racks mayshall be constructed of a convenient design to hold one or more test frames in a horizontal plane; however,a sufficient distance shall be maintained between frames to permit adequate circulation of the test atmosphere and permit testm
46、easurements without moving panels.FIG. 1 Sag Test FrameC367/C367M 16418.3 Zero-Plane PlateIn the event that measurements are made using the zero-plane plate, means of zeroing the dial indicator(seeNote 5 18.3.1), a zero-plane plate fabricated of 14 in. 6-mm thick by 3 in. 80 mm wide steel or aluminu
47、m stock, shall beprovided. The length of the plate shall be 14 in. 6 mm less than the inside width of the test frame.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. Thisconsists of placing a zero-plane plate i
48、n the test specimen frame parallel with the shortest member of the frame, and centered in the longest member ofthe frame. The sag bar is then placed beneath the frame and the dial gage is adjusted to read zero at the plane of the specimen surface.18.3.1 In the case of panels with a width of 24 in. 6
49、10 mm or less, an alternative means of zeroing the sag bar dial indicatorshall be used. This consists of placing a zero-plane plate in the test specimen frame parallel with the shortest member of the frame,and centered in the longest member of the frame. The sag bar is then placed beneath the frame and the dial gage is adjusted toread zero at the plane of the specimen surface.18.4 Sag Bar, equipped with a dial or digital gage indicator having a minimum movement of 1 in. 25 mm calibrate
