ASTM C367-99
(Test Method)Standard Test Methods for Strength Properties of Prefabricated Architectural Acoustical Tile or Lay-In Ceiling Panels
Standard Test Methods for Strength Properties of Prefabricated Architectural Acoustical Tile or Lay-In Ceiling Panels
SCOPE
1.1 These test methods cover the determination of the strength properties of prefabricated architectural acoustical tile or lay-in ceiling panels as follows: Tests Sections Hardness 2 to 7 Friability 8 to 13 Sag 14 to 20 Transverse strength 21 to 26
1.2 Not all of the tests described in these test methods may be necessary to evaluate any particular product for a specific use. In each instance, it will be necessary to determine which properties are required.
1.3 These test methods specify procedures that may be used in product development, manufacturing control, specification acceptance, and service evaluation.
1.4 Properties determined by these test methods reflect the performance of the materials under the specific conditions of the test, and do not necessarily indicate performance under conditions other than those specified herein.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C367 –99
Standard Test Methods for
Strength Properties of Prefabricated Architectural
Acoustical Tile or Lay-In Ceiling Panels
This standard is issued under the fixed designation C 367; the number immediately following the designation indicates the year of
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 (e) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
Materials used for absorbing sound generally have a porous, low-density structure. In comparison
with many building materials they may be relatively fragile. Materials are available that possess
adequate strength and stability and at the same time provide good sound absorption. The test methods
described here cover procedures for evaluating those physical properties related to strength. The
methods 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 considerations
important in judging the usefulness of an acoustical material. For example, a material judged to be
quite weak by one of these tests may still be desired for other reasons, and with adequate precautions,
may be shipped and installed successfully.
1. Scope priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
1.1 These test methods cover the determination of the
strength properties of prefabricated architectual acoustical tile
HARDNESS
or lay-in ceiling panels as follows:
Tests Sections 2. Significance and Use
Hardness 2 to 7
2.1 Knowledgeofhardnessisusefulinthedevelopmentand
Friability 8 to 13
Sag 14 to 20 the quality control of acoustical tile. Deviation from an
Transverse strength 21 to 26
established hardness range will assist in pointing out proc-
essing errors or defective raw materials, thereby aiding the
1.2 Not all of the tests described in these test methods may
be necessary to evaluate any particular product for a specific maintenance of uniform product quality.
2.2 This property is also useful in comparing the relative
use. In each instance, it will be necessary to determine which
properties are required. abilities of materials to resist indentations on the panel surface
caused by impacts.
1.3 These test methods specify procedures that may be used
in product development, manufacturing control, specification 2.3 Since the hardness varies with the thickness, only
samples of the same thickness may be directly compared.
acceptance, and service evaluation.
1.4 Properties determined by these test methods reflect the
3. Apparatus
performance of the materials under the specific conditions of
3.1 Testing Machine—Any standard mechanical or hydrau-
the test, and do not necessarily indicate performance under
lic testing machine capable of applying and measuring the
conditions other than those specified herein.
required load within an accuracy of 61 % may be used. It shall
1.5 This standard does not purport to address all of the
be equipped with a 50.8-mm (2.00-in.) diameter metal ball, or
safety concerns, if any, associated with its use. It is the
hemispherically shaped penetrator that bears upon the speci-
responsibility of the user of this standard to establish appro-
men surface.
4. Test Specimens
These test methods are under the jurisdiction of ASTM Committee E-33 on
Environmental Acoustics and are the direct responsibility of Subcommittee E33.04
4.1 Cut five 100 by 100-mm (4 by 4-in.) specimens from a
on Application of Acoustical Materials and Systems.
single tile or panel. Cut the five specimens from representative
Current edition approved September 10, 1999. Published November 1999.
Originally published as C 367 – 55 T. Last previous edition C 367 – 95. areas of the tile or ceiling panel.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
C367
5. Conditioning 9.4 Timer, consisting of a watch or clock capable of
measuring intervals of 10 min within 6 5.0 s.
5.1 The strength properties of acoustical materials often
depend on the moisture content at the time of the test.
10. Test Specimens
Therefore,conditionmaterialsfortestunder“roomconditions”
10.1 Cut twelve 25 by 25-mm (1 by 1-in.) square specimens
to constant weight (within 61 %) in an atmosphere maintained
from a single tile or panel. The specimen thickness is equal to
at a relative humidity of 50 6 2 %, and a temperature of 23 6
the tile or panel thickness.
1°C (73 6 2°F). State in the test report any departure from this
recommended condition.
NOTE 3—If the friability of original edges is of importance, separate
tests should be run on 25 by 25-mm (1 by 1-in.) specimens having one or
6. Procedure
two original edges.
6.1 Place the specimen in the conditioning chamber and let
11. Conditioning
it remain until equilibrium is obtained.
11.1 Maintainstandardconditionsasdescribedin5.1during
6.2 Place the specimen on a flat surface under the loading
preparation and testing of specimens.
penetrator of the test machine. Force the penetrator into the
specimen 6.46 0.3 mm (0.25 6 0.01 in.) below the original
12. Procedure
surface (Note 1) at a rate of 2.5 mm (0.10 in.)/min (Note 2).
12.1 Weigh the twelve specimens and record the combined
NOTE 1—The original surface is defined as the point where the
weight to the nearest 0.1 g.
penetrator first contacts the specimen.
12.2 Place the 12 specimens and the 24 oak cubes in the
NOTE 2—When possible, the penetrator should bear between perfora-
tions or fissures when testing perforated or fissured material. testing container. Close the top of the testing container and
rotate the container about its axis at a speed of 60 rpm for two
6.3 Record the load shown on the testing machine when the
10-min periods. At the end of each 10-min period, remove the
penetrator reaches the specified depression as the hardness of
specimens from the box and determine the percentage of loss
the specimen in newtons or pounds-force.
in weight, due to pulverization and breakage. In the case of
badly abraded specimens, remove up to twelve of the largest
7. Report
pieces remaining and weigh these for the determination. In rare
7.1 The report shall include the following:
cases, no pieces may remain from an individual specimen. In
7.1.1 Identification of the test material,
this case, the weight loss shall be reported as 100 %.
7.1.2 Method of conditioning including time of condition-
ing, temperature, °C or °F, and relative humidity, %,
13. Report
7.1.3 Statement describing whether the finished or unfin-
13.1 The report shall include the following:
ished surface was tested,
13.1.1 Identification of the test material,
7.1.4 Average thickness for the five specimens, mm or in.,
13.1.2 Method of conditioning including time of condition-
7.1.5 Individual thicknesses for each of the five specimens,
ing, temperature, °C or °F, and relative humidity, %, and
mm or in.,
13.1.3 Percentage loss in weight for the 10- and 20-min
7.1.6 Average hardness for the five specimens, N or lbf, and
periods.
7.1.7 Individual hardness for each of the five specimens, N
or lbf.
SAG
FRIABILITY
14. Significance and Use
8. Significance and Use
14.1 This test method is for the purpose of determining the
8.1 The friability test measures the susceptibility of an sag properties of ceiling tile or panels under various conditions
of humidity exposure. Tiles or panels of various sizes can be
acoustical product to edge and corner damage that might be
tested by using appropriately sized supporting frames.
sustained during shipping, handling, and installing. Products
14.2 The test method will provide both the initial sag below
that are friable and soft may erode considerably when sub-
the plane of the grid system and the total moisture-induced sag.
jected to rough treatment.
14.3 This test method is not designed to establish the
9. Apparatus
expected performance of the ceiling panels under field condi-
tions of use, but only the sag properties for the specific
9.1 Balance, accurate to within 0.5 % of the weight of the
temperature, humidity, exposure time, and mounting condi-
smallest specimen tested.
tions used in the test.
9.2 Testing Container, consisting of a red oak box with
3 1
inside dimensions of 200 mm (7 ⁄4 in.) square by 190 mm (7 ⁄2
15. Apparatus
in.) deep and fitted with a cover on one end for inserting and
removing the specimens. The box shall be mounted so that it 15.1 Controlled-Atmosphere Chamber, capable of operating
may be rotated at 60 r/min on a horizontal axis that is at a dry-bulb temperature of 23 to 326 1.5°C (73 to 90 6 3°F),
perpendicular to its square dimension. and relative humidities of 50, 60, 70, 80, or 90 6 2 %. The
3 1
9.3 Red Oak Cubes, 24, 19 6 0.8 mm ( ⁄4 6 ⁄32 in.) on an chambershouldbeequippedwithsuitablerecordingequipment
edge, having a specific gravity of 0.65 6 0.02. to record wet- and dry-bulb temperatures (or dry bulb and
C367
This consists of placing a zero-plane plate in the test specimen frame
relative humidity). This equipment shall be checked periodi-
parallel with the shortest member of the frame, and centered in the longest
cally and calibrated with a psychrometer that shall also be used
member of the frame.The sag bar is then placed beneath the frame and the
to establish the test conditions.
dial gage is adjusted to read zero at the plane of the specimen surface.
15.2 Sample Test Frames and Racks, fabricated from non-
15.4 Sag Bar, equipped with a dial indicator having a
ferrous metal, such as aluminum, and of suitable linear
minimum movement of 25 mm (1 in.) calibrated in increments
dimension
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.