National foreword

This British Standard is the UK implementation of EN 12697‑22:2020+A1:2023. It supersedes BS EN 12697‑22:2020, which is withdrawn.

The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by .

The UK participation in its preparation was entrusted to Technical Committee B/510/1, Asphalt products.

A list of organizations represented on this committee can be obtained on request to its committee manager.

Contractual and legal considerations

This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be accepted by BSI in relation to the adequacy, accuracy, completeness or reasonableness of this publication. All and any such responsibility and liability is expressly disclaimed to the full extent permitted by the law.

This publication is provided as is, and is to be used at the recipient’s own risk.

The recipient is advised to consider seeking professional guidance with respect to its use of this publication.

This publication is not intended to constitute a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2020.

This European Standard was approved by CEN on 18 November 2019 and includes Amendment 0 approved by CEN on 20 November 2023.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and United Kingdom.

European foreword

This document (EN 12697‑22:2020+A1:2023) has been prepared by Technical Committee CEN/TC 227 “Road materials”, the secretariat of which is held by BSI.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2024, and conflicting national standards shall be withdrawn at the latest by June 2024.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 12697‑22:2020.

This document includes Amendment 1 approved by CEN on 20 November 2023.

The start and finish of text introduced or altered by amendment is indicated in the text by tags .

The following is a list of significant technical changes since the previous edition:

the title no longer makes the method exclusively for hot mix asphalt;
[Clause 2] ISO 48, Rubber, vulcanized or thermoplastic — Determination of hardness (hardness between 10 IRHD and 100 IRHD), replaced by: ISO 48‑2, Rubber, vulcanized or thermoplastic — Determination of hardness — Part 2: Hardness between 10 IRHD and 100 IRHD; ISO 7619, Rubber, vulcanized or thermoplastic — Determination of indentation hardness, replaced by: ISO 48‑5, Rubber, vulcanized or thermoplastic — Determination of hardness — Part 5: Indentation hardness by IRHD pocket meter method;
[3.5] Table 1 deleted;
[Clause 4] symbols for properties in the different methods made more consistent and corrected through the whole document. Table 2 replaced by new Table 1;
[Clause 6] moulds added to the list of equipment. Modifications for clarity;
[6.3.1.2] ISO 7619 and ISO 48 replaced by: ISO 48‑5 and 48-2;
[7.1] new clause added and the order of clauses changed;
[7.2.1.1] vibratory compactor excluded as a method of sample preparation;
[7.2.1.2] thickness for mixtures with upper sieve size larger than 22 changed to 80 mm;
[7.5.1] the text has been modified for clarity. “Plaster of Paris” amended to holding medium;
[7.6] storage time amended to max 42 days and requirement added for storing samples on a flat surface;
[8.1.7] deleted;
[9.2.1] Formula (2) corrected;
[9.3.1.2] Formula (7) corrected;
[9.3.2.2] required rounding of WTS_AIR values specified;
[9.3.3.2] required rounding of WTS_W values specified;
[10.1.2] type of roller compactor required to be reported;
[11.4] precision data for small device, procedure B (air) added;

A list of all parts in the EN 12697 series can be found on the CEN website.

Any feedback and questions on this document should be directed to the users’ national standards body. A complete listing of these bodies can be found on the CEN website.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United Kingdom.

1 Scope

This document describes test methods for determining the susceptibility of bituminous materials to deform under load. The test is applicable to mixtures with upper sieve size less than or equal to 32 mm.

The tests are applicable to specimens prepared from asphalt mixtures that have either been manufactured in a laboratory or cut from a pavement; test specimens are held in a mould with their surface flush with the upper edge of the mould.

The susceptibility of bituminous materials to deform is assessed by the rut formed by repeated passes of a loaded wheel at constant temperature. Three alternative types of devices can be used according to this document: large size devices, extra-large size devices and small size devices. With large size devices and extra-large size devices, the specimens are conditioned in air during testing. With small size devices, specimens are conditioned, in either air or water.

NOTE Large size and extra-large size devices are not suitable for use with cylindrical cores.

2 Normative references

3 Terms and definitions

4 Symbols and abbreviated terms

5 Principle

6 Apparatus

6.1 Large size devices

6Extra-large devices

6.3 Small size devices for use with rectangular plates

6.4 Small-size devices for use with cores

7 Sampling and sample preparation

7.1 Test portion

7.2 Sampling and manufacture

7.3 Thickness and surface regularity

7.4 Transport and storage of unmounted specimens

7.5 Sample preparation

7.6 Storage

7.7 Temperature probes

8 Procedure for carrying out a single measurement

8.1 Large size devices

8.2 Extra-large size device

8.3 Small size devices

9 Calculation and expression of results

9.1 Large size devices

9.2 Extra-large size device

9.3 Small size devices

10 Test report

10.1 Obligatory information

10.2 Complementary information

11 Precision

11.1 General

11.2 Laboratory prepared samples, proportional rut depth, large size devices

11.3 Samples cored from a pavement and laboratory prepared samples, wheel-tracking rate, small-size devices, conditioning in air

11.4 Samples cored from a pavement and laboratory prepared samples, wheel-tracking rate, small-size devices, conditioning in air, procedure B

Bibliography

BS EN 12697-22:2020+A1:2023

Bituminous mixtures. Test methods - Wheel tracking

Current

Published:

31 Jan 2024