Rubber, vulcanized -- Preformed joint seals for use between concrete paving sections of highways -- Specification

ISO 4635:2011 specifies requirements for material for preformed vulcanized rubber joint seals used between concrete paving sections of highways. It is applicable to seals for joints in new concrete highways as well as to maintenance work on such highways. It does not cover the design or dimensions of seals, but general requirements for finished seals are given.

Caoutchouc vulcanisé -- Joints d'étanchéité préformés utilisés entre les dalles en béton des routes -- Spécifications

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Status
Published
Publication Date
02-Feb-2011
Current Stage
9060 - Close of review
Start Date
05-Jun-2021
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ISO 4635:2011 - Rubber, vulcanized -- Preformed joint seals for use between concrete paving sections of highways -- Specification
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INTERNATIONAL ISO
STANDARD 4635
Second edition
2011-02-15
Rubber, vulcanized — Preformed joint
seals for use between concrete paving
sections of highways — Specification
Caoutchouc vulcanisé — Joints d'étanchéité préformés utilisés entre les
dalles en béton des routes — Spécifications
Reference number
ISO 4635:2011(E)
ISO 2011
---------------------- Page: 1 ----------------------
ISO 4635:2011(E)
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© ISO 2011

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ii © ISO 2011 – All rights reserved
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ISO 4635:2011(E)
Contents Page

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

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

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

3 Terms and definitions ...........................................................................................................................2

4 Classification .........................................................................................................................................2

5 Test pieces and temperature of test....................................................................................................3

6 Requirements.........................................................................................................................................3

6.1 General ...................................................................................................................................................3

6.2 Dimensional tolerances ........................................................................................................................3

6.3 Imperfections and defects....................................................................................................................3

6.4 Hardness ................................................................................................................................................3

6.5 Tensile strength and elongation at break ...........................................................................................3

6.6 Compression set in air..........................................................................................................................4

6.7 Accelerated ageing in air......................................................................................................................5

6.8 Stress relaxation in compression........................................................................................................5

6.9 Recovery at low and elevated temperatures ......................................................................................5

6.10 Low-temperature hardness change.....................................................................................................5

6.11 Ozone resistance...................................................................................................................................5

6.12 Effect of water........................................................................................................................................6

6.13 Protection against over-extension ......................................................................................................6

6.14 Functional testing for cold climates....................................................................................................7

7 Marking, labelling and storage.............................................................................................................7

Annex A (normative) Recovery at low and elevated temperatures ...............................................................8

Annex B (normative) Functional testing for cold climates.............................................................................9

© ISO 2011 – All rights reserved iii
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ISO 4635:2011(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 4635 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee

SC 4, Products (other than hoses).

This second edition cancels and replaces the first edition (ISO 4635:1982), which has been technically revised.

The main modifications are as follows:

⎯ The hardness classes have been changed from IRHD 55, IRHD 60, IRHD 65 and IRHD 70 to IRHD 40,

IRHD 50, IRHD 60, IRHD 70 and IRHD 80. Hardness tolerances have been added. Requirements have

been added for compression set at low temperature, stress relaxation in compression and protection

against over-extension.

⎯ Clauses have been included on functional testing for cold climates, the effect of water, and marking,

labelling and packaging.

⎯ The requirements for recovery at low and elevated temperatures have been changed. In addition, the

ozone resistance is now measured only under normal conditions (50 pphm ozone) and not under the

alternative severe conditions (200 pphm ozone).

⎯ The temperature at which the compression set at elevated temperature is measured has been changed

from 100 °C to 70 °C.
iv © ISO 2011 – All rights reserved
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INTERNATIONAL STANDARD ISO 4635:2011(E)
Rubber, vulcanized — Preformed joint seals for use between
concrete paving sections of highways — Specification

CAUTION — Manufacturers shall ensure that emissions from their products of substances which

could be hazardous to health or to the environment are not in excess of the legally permitted level in

the country of use.
1 Scope

This International Standard specifies requirements for material for preformed vulcanized rubber joint seals

used between concrete paving sections of highways.

It is applicable to seals for joints in new concrete highways as well as to maintenance work on such highways.

It does not cover the design or dimensions of seals, but general requirements for finished seals are given.

NOTE This International Standard is based on experience with chloroprene (CR) rubber and ethylene-propylene-

diene monomer (EPDM) rubber.
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 37, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties

ISO 48:2010, Rubber, vulcanized or thermoplastic — Determination of hardness (hardness between 10 IRHD

and 100 IRHD)

ISO 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests

ISO 815-1:2008, Rubber, vulcanized or thermoplastic — Determination of compression set — Part 1: At

ambient or elevated temperatures

ISO 815-2:2008, Rubber, vulcanized or thermoplastic — Determination of compression set — Part 2: At low

temperatures

ISO 1431-1, Rubber, vulcanized or thermoplastic — Resistance to ozone cracking — Part 1: Static and

dynamic strain testing
ISO 1817, Rubber, vulcanized — Determination of the effect of liquids
ISO 2230, Rubber products — Guidelines for storage

ISO 2285, Rubber, vulcanized or thermoplastic — Determination of tension set under constant elongation, and

of tension set, elongation and creep under constant tensile load

ISO 3302-1:1996, Rubber — Tolerances for products — Part 1: Dimensional tolerances

© ISO 2011 – All rights reserved 1
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ISO 4635:2011(E)

ISO 3384:2005 , Rubber, vulcanized or thermoplastic — Determination of stress relaxation in compression at

ambient and at elevated temperatures

ISO 3387, Rubber — Determination of crystallization effects by hardness measurements

ISO 5893, Rubber and plastics test equipment — Tensile, flexural and compression types (constant rate of

traverse) — Specification

ISO 23529, Rubber — General procedures for preparing and conditioning test pieces for physical test

methods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
joint

vertical discontinuity between the adjacent faces of paving slabs in a concrete highway, formed for the

purpose of providing some movement capability
3.2
joint chamber

cut made in the upper part of the joint to offer a seating for a preformed joint seal

NOTE The width of the chamber depends on the movement capability required of the preformed joint seal. The

bottom of the chamber supports the preformed joint seal, enabling it to withstand the vertical forces caused by traffic.

3.3
preformed joint seal

extruded (preformed) and vulcanized elastic rubber profile that, when inserted by special machines into the

joint chamber, is compressed by the adjacent surfaces of the paving slabs, thus filling the joint and preventing

the ingress of water

NOTE A fibre reinforcement can be incorporated in the preformed joint seal as additional protection against over-

extension.
3.4
international rubber hardness degree
IRHD

measure of hardness, the magnitude of which is derived from the depth of penetration of a specified indentor

into a test piece under specified conditions

NOTE 1 The reaction forces produced by compressed preformed joint seals depend on the geometry and hardness of

the seal. The higher the IRHD value, the higher the reaction force. The lower the IRHD value, the better the lips of the

rubber profile grip the surfaces of the joint chamber.
NOTE 2 ISO 48 specifies a method of measuring hardness in terms of IRHD values.
4 Classification

The hardness of materials for preformed joint seals shall be divided into five classes, as given in Table 1.

Table 1 — Hardness classification
Hardness class 40 50 60 70 80

Range of IRHD > 35 but u 45 > 45 but u 55 > 55 but u 65 > 65 but u 75 > 75 but u 85

1) Under revision as ISO 3384-1.
2 © ISO 2011 – All rights reserved
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ISO 4635:2011(E)
5 Test pieces and temperature of test

5.1 Unless otherwise specified, the test pieces shall be cut from the finished product by the method

specified in ISO 23529. If the test pieces specified in a particular test method cannot be prepared from the

finished seals, they shall be taken from moulded test slabs of suitable dimensions, made from the same batch

of material as used for the seal, and vulcanized under conditions which are comparable with the conditions

used in production.

5.2 Unless otherwise specified, the test shall be carried out at a standard laboratory temperature in

accordance with ISO 23529.
6 Requirements
6.1 General

6.1.1 The seal materials shall be made from an ozone-resistant rubber (see 6.11) and shall not depend for

ozone resistance solely on surface protection, as this can be removed by abrasion, detergents or other means.

6.1.2 The material shall be black.
6.2 Dimensional tolerances

The dimensions shall be determined in accordance with ISO 3302-1 and the result shall conform to class E1

or E2 as defined in ISO 3302-1:1996.
6.3 Imperfections and defects

Imperfections and defects shall be determined by visual inspection. The surfaces of preformed seals shall be

free of surface defects or irregularities, as these can affect their proper functioning.

6.4 Hardness

6.4.1 The hardness shall be determined in accordance with ISO 48:2010, method M. The result shall

conform to the relevant value given in Table 2, line 1.1.

6.4.2 In addition, make five measurements at points distributed at random over a 5 m length of the

preformed joint seal. The difference between the minimum and the maximum hardness shall not be more than

5 IRHD. Each value shall be within the range specified for the relevant hardness class (see Table 2, line 1.2).

6.5 Tensile strength and elongation at break

6.5.1 These tests shall be carried out on test pieces from the product, with the textile material removed,

using the technique specified in ISO 23529, where appropriate.

6.5.2 The tensile strength and elongation at break shall be determined in accordance with ISO 37,

preferably using a type 2 dumb-bell test piece. The tensile strength and the elongation at break shall conform

to the relevant values given in Table 2, lines 2 and 3.
© ISO 2011 – All rights reserved 3
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ISO 4635:2011(E)
Table 2 — Requirements for preformed joint seals
Requirements for hardness classes
Line Sub-
Property Unit
No. clause
40 50 60 70 80
> 35 > 45 > 55 > 65 > 75
1.1 Hardness
...

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