ISO 29469:2008
(Main)Thermal insulating products for building applications — Determination of compression behaviour
Thermal insulating products for building applications — Determination of compression behaviour
ISO 29469:2008 specifies the equipment and procedures for determining the compression behaviour of specimens. It is applicable to thermal insulating products and can be used to determine the compressive stress in compressive creep tests and for applications in which insulation products are exposed only to short‑term loads. ISO 29469:2008 can be used for quality control purposes and can also be employed to obtain reference values from which design values can be calculated using safety factors.
Produits isolants thermiques destinés aux applications du bâtiment — Détermination du comportement en compression
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 29469
First edition
2008-11-01
Thermal insulating products for building
applications — Determination of
compression behaviour
Produits isolants thermiques destinés aux applications du bâtiment —
Détermination du comportement en compression
Reference number
ISO 29469:2008(E)
©
ISO 2008
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ISO 29469:2008(E)
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ii © ISO 2008 – All rights reserved
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ISO 29469:2008(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 1
4 Principle. 2
5 Apparatus . 2
6 Test specimens . 4
7 Procedure . 5
8 Calculation and expression of results. 5
9 Accuracy. 7
10 Test report . 8
Annex A (normative) Modifications to the general test method for cellular glass products . 9
© ISO 2008 – All rights reserved iii
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ISO 29469:2008(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 29469 was prepared by Technical Committee ISO/TC 163, Thermal performance and energy use in the
built environment, Subcommittee SC 1, Test and measurement methods.
iv © ISO 2008 – All rights reserved
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ISO 29469:2008(E)
Introduction
This International Standard comprises the original EN 826:1996 prepared by Technical Committee
CEN/TC 88, Thermal insulating materials and products, which has been amended by ISO/TC 163/SC 1 with
reference to conditioning and testing conditions in tropical countries.
This International Standard is one of a series of documents specifying test methods, based on existing
European Standards, that are being adopted by ISO. This “package” of standards includes the following group
of interrelated documents.
International Standard Respective EN
standard
ISO 29465, Thermal insulating products for building applications — Determination of length
EN 822
and width
ISO 29466, Thermal insulating products for building applications — Determination of
EN 823
thickness
ISO 29467, Thermal insulating products for building applications — Determination of
EN 824
squareness
ISO 29468, Thermal insulating products for building applications — Determination of flatness
EN 825
ISO 29469, Thermal insulating products for building applications — Determination of
EN 826
compression behaviour
ISO 29470, Thermal insulating products for building applications — Determination of the
EN 1602
apparent density
ISO 29471, Thermal insulating products for building applications — Determination of
EN 1603
dimensional stability under constant normal laboratory conditions (23°C/50 % relative
humidity)
ISO 29472, Thermal insulating products for building applications — Determination of
EN 1604
dimensional stability under specified temperature and humidity conditions
ISO 29764, Thermal insulating products for building applications — Determination of
EN 1605
deformation under specified compressive load and temperature conditions
ISO 29765, Thermal insulating products for building applications — Determination of tensile
EN 1607
strength perpendicular to faces
ISO 29766, Thermal insulating products for building applications — Determination of tensile
EN 1608
strength parallel to faces
ISO 29767, Thermal insulating products for building applications — Determination of short-
EN 1609
term water absorption by partial immersion
ISO 29768, Thermal insulating products for building applications — Determination of linear
EN 12085
dimensions of test specimens
ISO 29769, Thermal insulating products for building applications — Determination of
EN 12430
behaviour under point load
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ISO 29469:2008(E)
ISO 29770, Thermal insulating products for building applications — Determination of
EN 12431
thickness for floating-floor insulating products
ISO 29771, Thermal insulating materials for building applications — Determination of organic
EN 13820
content
ISO 29803, Thermal insulation products for building applications — Determination of the
EN 13497
resistance to impact of external thermal insulation composite systems (ETICS)
ISO 29804, Thermal insulation products for building applications — Determination of the
EN 13494
tensile bond strength of the adhesive and of the base coat to the thermal insulation material
ISO 29805, Thermal insulation products for building applications — Determination of the
EN 13496
mechanical properties of glass fibre meshes
vi © ISO 2008 – All rights reserved
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INTERNATIONAL STANDARD ISO 29469:2008(E)
Thermal insulating products for building applications —
Determination of compression behaviour
1 Scope
This International Standard specifies the equipment and procedures for determining the compression
behaviour of specimens. It is applicable to thermal insulating products and can be used to determine the
compressive stress in compressive creep tests and for applications in which insulation products are exposed
only to short-term loads.
The method can be used for quality control purposes and can also be employed to obtain reference values
from which design values can be calculated using safety factors.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 29768, Thermal insulating products for building applications — Determination of linear dimensions of test
specimens
ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results — Part 2: Basic method
for the determination of repeatability and reproducibility of a standard measurement method
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
relative deformation
ε
ratio of the reduction in thickness of the test specimen to its initial thickness, d , measured in the direction of
0
loading and expressed as a percentage
3.2
compressive strength
σ
m
ratio of the maximum compressive force, F , reached when the strain, ε, at yield [see Figure 1 b)] or rupture
m
[see Figure 1 a)] is less than 10 %, to the initial cross-sectional area of the test specimen
3.3
compressive stress at 10 % strain
σ
10
ratio of the compressive force, F , at 10 % strain, ε , to the initial cross-section of the test specimen [see
10 10
Figure 1, c) and d)] for products presenting 10 % strain before possible yield or rupture
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ISO 29469:2008(E)
3.4
compression modulus of elasticity
E
compressive stress divided by the corresponding strain below the proportional limit, when the relationship is
linear (see Figure 1)
4 Principle
A compressive force is applied at a given rate of displacement perpendicular to the major faces of a squarely
cut test specimen and the maximum stress supported by the specimen calculated.
When the value of the maximum stress corresponds to a strain of less than 10 %, it is designated as
compressive strength and the corresponding strain is reported. If no failure is observed before the 10 % strain
has been reached, the compressive stress at 10 % strain is calculated and its value reported as compressive
stress at 10 % strain.
5 Apparatus
5.1 Compression testing machine, designed to suit the range of force and displacement involved and
having two very rigid, polished, square or circular plane parallel platens with a minimum side length (or
diameter) equal to the side length (or diagonal) of the test specimen.
One of the platens shall be fixed and the other shall be movable, with a centrally positioned ball joint to ensure
that only axial force is applied to the specimen, if appropriate. The movable platen shall be capable of moving
at a constant rate of displacement in accordance with Clause 7.
5.2 Displacement measuring device, fitted to the compression testing machine, which allows continuous
measurement of the displacement of the movable platen to an accuracy of ± 5 % or ± 0,1 mm, whichever is
smaller (see 5.3).
5.3 Force measuring device, comprised of a sensor fitted to one of the machine platens to measure the
force produced by the reaction of the specimen on the platens. This sensor shall be such that either its own
deformation during the measuring operation is negligible compared with that of the object being measured or
its own deformation shall be taken into account by calculation. In addition, it shall allow the continuous
measurement of the force to an accuracy of ± 1 %.
5.4 Recording device, for the simultaneous recording of the force, F, and the displacement, X, which
provides a curve of F as a function of X (see 7.2).
NOTE The curve gives additional information on the behaviour of the product and possibly enables the determination
of the compression modulus of elasticity.
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ISO 29469:2008(E)
a) b)
c) d)
Key
X displacement
Y force
F force corresponding to the preload
p
F maximum force
m
X displacement at maximum force
m
F force at 10 % strain
10
X displacement at 10 % strain
10
F force corresponding to X (conventional proportional limit)
e e
X displacement in the conventional elastic zone
e
a
X is smaller than 10 %.
m
Figure 1 — Examples of force displacement curves
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ISO 29469:2008(E)
6 Test specimens
6.1 Dimensions of specimens
The tes
...
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