Thermal insulating products for building applications — Determination of compressive creep

This International Standard specifies the equipment and procedures for determining the compressive creep of specimens under various conditions of stress. It is applicable to thermal insulating products.

Produits isolants thermiques destinés aux applications du bâtiment — Détermination du fluage en compression

General Information

Status
Withdrawn
Publication Date
07-May-2012
Withdrawal Date
07-May-2012
Current Stage
9599 - Withdrawal of International Standard
Start Date
17-Jun-2020
Completion Date
17-Jun-2020
Ref Project

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ISO 16534:2012 - Thermal insulating products for building applications -- Determination of compressive creep
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INTERNATIONAL ISO
STANDARD 16534
First edition
2012-05-15
Thermal insulating products for building
applications — Determination of
compressive creep
Produits isolants thermiques destinés aux applications du bâtiment —
Détermination du fluage en compression
Reference number
ISO 16534:2012(E)
ISO 2012
---------------------- Page: 1 ----------------------
ISO 16534:2012(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2012

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,

electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s

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Published in Switzerland
ii © ISO 2012 – All rights reserved
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ISO 16534:2012(E)
Contents Page

Foreword ............................................................................................................................................................................iv

Introduction ........................................................................................................................................................................ v

1 Scope ...................................................................................................................................................................... 1

2 Normative references ......................................................................................................................................... 1

3 Terms and definitions ......................................................................................................................................... 1

4 Principle ................................................................................................................................................................. 3

5 Apparatus .............................................................................................................................................................. 3

6 Test specimens .................................................................................................................................................... 4

6.1 Selection of test specimens ............................................................................................................................. 4

6.2 Dimensions of test specimens ........................................................................................................................ 4

6.3 Number of test specimens ................................................................................................................................ 5

6.4 Preparation of test specimens ......................................................................................................................... 5

6.5 Conditioning of test specimens ...................................................................................................................... 5

7 Procedure .............................................................................................................................................................. 5

7.1 Test conditions ..................................................................................................................................................... 5

7.2 Stress selection ................................................................................................................................................... 6

7.3 Test procedure ..................................................................................................................................................... 6

7.4 Duration of test .................................................................................................................................................... 7

8 Calculation and expression of results ........................................................................................................... 7

9 Accuracy of measurement ................................................................................................................................ 7

10 Test report ............................................................................................................................................................. 7

Annex A (normative) Calculation method ..................................................................................................................10

Annex B (informative) Example of a linear regression analysis ..........................................................................13

Bibliography .....................................................................................................................................................................16

© ISO 2012 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 16534:2012(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 16534 was prepared by Technical Committee ISO/TC 163, Thermal performance and energy use in the

built environment, Subcommittee SC 1, Test and measurement methods.

ISO 16534 includes the original EN 1606 prepared by Technical Committee CEN/TC 88 “Thermal insulating

materials and products”, with the following clauses modified to reflect the conditions for tropical countries:

— Clause 6.5: Conditioning of test specimens;
— Clause 7.1: Test conditions;
— Clause 10: Test report.
iv © ISO 2012 – All rights reserved
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ISO 16534:2012(E)
Introduction

ISO 16534 is one of a series of existing European Standards on test methods which were adopted by ISO. This

group of International Standards comprises the following group of interrelated standards:

ISO Title Respective
standard

12344 Thermal insulating products for building applications — Determination of EN 12089

bending behaviour

12968 Thermal insulation products for building applications — Determination of the EN 13495

pull-off resistance of external thermal insulation composite systems (ETICS)
(foam block test)

29465 Thermal insulating products for building applications — Determination of length EN 822

and width

29466 Thermal insulating products for building applications — Determination of EN 823

thickness

29467 Thermal insulating products for building applications — Determination of EN 824

squareness

29468 Thermal insulating products for building applications — Determination of flatness EN 825

29469 Thermal insulating products for building applications — Determination of EN 826

compression behaviour

29470 Thermal insulating products for building applications — Determination of the EN 1602

apparent density

29471 Thermal insulating products for building applications — Determination of EN 1603

dimensional stability under constant normal laboratory conditions (23 degrees
C/50 % relative humidity)

29472 Thermal insulating products for building applications — Determination of EN 1604

dimensional stability under specified temperature and humidity conditions

29764 Thermal insulating products for building applications — Determination of EN 1605

deformation under specified compressive load and temperature conditions

29765 Thermal insulating products for building applications — Determination of tensile EN 1607

strength perpendicular to faces

29766 Thermal insulating products for building applications — Determination of tensile EN 1608

strength parallel to faces

29767 Thermal insulating products for building applications — Determination of short- EN 1609

term water absorption by partial immersion

29768 Thermal insulating products for building applications — Determination of linear EN 12085

dimensions of test specimens

29769 Thermal insulating products for building applications — Determination of EN 12430

behaviour under point load

29770 Thermal insulating products for building applications — Determination of EN 12431

thickness for floating-floor insulating products
© ISO 2012 – All rights reserved v
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ISO 16534:2012(E)

29771 Thermal insulating materials for building applications — Determination of EN 13820

organic content

29803 Thermal insulation products for building applications — Determination of the EN 13497

resistance to impact of external thermal insulation composite systems (ETICS)

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

29805 Thermal insulation products for building applications — Determination of the EN 13496

mechanical properties of glass fibre meshes

16534 Thermal insulating products for building applications — Determination of EN 1606

compressive creep

16535 Thermal insulating products for building applications — Determination of long- EN 12087

term water absorption by immersion

16536 Thermal insulating products for building applications — Determination of long- EN 12088

term water absorption by diffusion

16537 Thermal insulating products for building applications — Determination of shear EN 12090

behaviour

16546 Thermal insulating products for building applications —Determination of freeze- EN 12091

thaw resistance

16544 Thermal insulating products for building applications — Conditioning to moisture EN 12429

equilibrium under specified temperature and humidity conditions

16545 Thermal insulating products for building applications — Determination of EN 13793

behaviour under cyclic loading

A further group of existing European Standards on test methods for products used to insulate building equipment

and industrial installations comprises the following group of interrelated International Standards:

ISO 12623 Thermal insulating products for building equipment and industrial installations — EN 13472

Determination of short-term water absorption by partial immersion of preformed
pipe insulation

ISO 12624 Thermal insulating products for building equipment and industrial installations — EN 13468

Determination of trace quantities of water soluble chloride, fluoride, silicate,
sodium ions and pH

ISO 12628 Thermal insulating products for building equipment and industrial installations — EN 13467

Determination of dimensions, squareness and linearity of preformed pipe
insulation

ISO 12629 Thermal insulating products for building equipment and industrial installations — EN 13469

Determination of water vapour transmission properties of preformed pipe
insulation
vi © ISO 2012 – All rights reserved
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INTERNATIONAL STANDARD ISO 16534:2012(E)
Thermal insulating products for building applications —
Determination of compressive creep
1 Scope

This International Standard specifies the equipment and procedures for determining the compressive creep of

specimens under various conditions of stress. It is applicable to thermal insulating products.

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 29469, Thermal insulating products for building applications — Determination of compression behaviour

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 definitions apply.
3.1
thickness
linear dimension measured perpendicular to the length and width plane
3.1.1
thickness
original product thickness
3.1.2
thickness
initial thickness of the test specimen
3.1.3
thickness

thickness of the test specimen under the basic compressive stress of the loading device (‘dead weight’)

3.1.4
thickness
thickness of the test specimen 60 s after the beginning of the loading process
3.1.5
thickness
thickness of the test specimen at a given time, t
© ISO 2012 – All rights reserved 1
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ISO 16534:2012(E)
3.2
compressive stress

ratio of the compressive force to the initial surface area of the cross-section of the test specimen

3.3
deformation
reduction in thickness of the test specimen
3.4
relative deformation

ratio of the deformation of the test specimen X, and its thickness d , measured in the direction of loading

3.5
compressive creep

increase in deformation of the test specimen under a constant stress with time under specified conditions of

temperature and humidity
X = X − X
ct t 0
where
X is the deformation at time t;
X is the initial deformation (after 60 s from the beginning of loading).

An illustration of the different thicknesses and deformations is given in Figure 1.

2 © ISO 2012 – All rights reserved
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ISO 16534:2012(E)
Key
a thickness
b time, t
c deformation curve
d reference value for deformation measurements

1 ‘Dead weight’ of the loading device (<10 % of the smallest stress chosen for the creep test).

2 Load applied in the compressive creep test.

NOTE In the illustration, d is used as a reference value for deformation measurements. If d is used as the reference

L s
value, the illustration can be used, omitting the column for d (see 7.3).
Figure 1 — Illustration of the different thicknesses and deformations
4 Principle

The compressive creep is determined by measuring the increase in deformation of a specimen under constant

compressive stress and specified conditions of temperature, humidity and time.
5 Apparatus

5.1 Loading device, consisting of two flat platens, one of which shall be movable, arranged so that they

compress the specimen in a vertical direction. The movable platen shall be guided in such a manner as to be

self-aligning. The platens shall be capable of being loaded smoothly and without distortion so that, during the

test, the static stress does not change by more than ± 5 %.

5.2 Measuring device (e.g. dial gauge), capable of determining the distance between the two platens, i.e.

the deformation of the specimen, to an accuracy of 0,01 mm.

5.3 Suitable damping measures, to minimize the effects of external vibration (e.g. substantial foundation of

the apparatus support).
Examples of the testing apparatus are given in Figure 2.
© ISO 2012 – All rights reserved 3
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ISO 16534:2012(E)
a) b)
Key
1 displacement transducer or dial gauge 4 test specimen
2 loading bridge 5 support beam
3 load distribution plate (movable, self-aligning) 6 loading by weights
Figure 2 — Examples of test apparatus
6 Test specimens
6.1 Selection of test specimens

The specimens for determining the compressive creep shall be taken from the same sample, with the same

preparation as the specimens used for the compression test as specified in EN 826.

The method of selecting the specimens shall be as specified in the relevant product standard.

NOTE In the absence of a product standard or any other technical specification, the method of selection of the test

specimens can be agreed between parties.
6.2 Dimensions of test specimens

The thickness of specimens shall be equal to the original product thickness. The width of the specimens shall

not be less than their thickness. Products with facings or integrally moulded skins which are retained in use

shall be tested with these faces or skins intact.
4 © ISO 2012 – All rights reserved
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ISO 16534:2012(E)
Test specimens shall not be layered to produce a greater thickness for testing.

The specimens shall be cut squarely and have sides with the following recommended dimensions:

— 50 mm × 50 mm; or
— 100 mm × 100 mm; or
— 150 mm × 150 mm; or
— 200 mm × 200 mm or
— 300 mm × 300 mm.

The dimensions of specimens shall be the same as used in the compression test as described in ISO 29469.

These are specified in the relevant product standard or agreed between parties.

The linear dimensions shall be determined in accordance with ISO 29768, to an accuracy of 0,5 %.

The tolerance and parallelism and flatness between the upper and lower face of the specimen shall not be

greater than 0,5 % of its side length, with a maximum of 0,5 mm.

If the specimen is not flat, it shall be ground flat or an adequate coating shall be applied to prepare the surface

for the test. Where it is coated, no significant creep should occur in the coating or it shall be taken into account

by deducting the creep of the coating.
6.3 Number of test specimens
The number of specimen
...

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