EN 12697-24:2018

Bituminous mixtures - Test methods - Part 24: Resistance to fatigue

This European Standard specifies the methods for characterizing the fatigue of bituminous mixtures using alternative tests, including bending tests and direct and indirect tensile tests. The tests are performed on compacted bituminous material under a sinusoidal loading or other controlled loading, using different types of specimens and supports.
The procedure is used:
a)   to rank bituminous mixtures on the basis of resistance to fatigue;
b)   as a guide to relative performance in the pavement;
c)   to obtain data for estimating the structural behaviour of the road; and
d)   to judge test data according to specifications for bituminous mixtures.
Because this European Standard does not impose a particular type of testing device, the precise choice of the test conditions depends on the possibilities and the working range of the device used. For the choice of specific test conditions, the requirements of the product standards for bituminous mixtures need to be respected. The applicability of this document is described in the product standards for bituminous mixtures.

Asphalt - Prüfverfahren - Teil 24: Beständigkeit gegen Ermüdung

Diese Europäische Norm legt die Verfahren zur Charakterisierung der Ermüdung von Asphalt durch verschiedene Prüfungen, einschließlich Biegeprüfungen und Prüfungen der direkten sowie der indirekten Zugfestigkeit, fest. Die Prüfungen werden an verdichtetem Asphalt unter sinusförmiger oder einer anderen kontrollierten Belastung unter Verwendung verschiedener Probekörpertypen und Auflagerungen vorgenommen.
Das Verfahren dient:
a)   zur Einstufung von Asphalt nach seiner Beständigkeit gegen Ermüdung;
b)   als Hinweis auf das relative Leistungsvermögen von Asphalt in der Fahrbahnbefestigung;
c)   dazu, Daten zur Abschätzung des Tragverhaltens in der Straße zu erhalten; und
d)   zur Beurteilung der Prüfdaten nach den für Asphalt geltenden Festlegungen.
Da diese Europäische Norm keinen bestimmten Prüfgerätetyp vorschreibt, hängt die genaue Auswahl der Prüfbedingungen von den Möglichkeiten und dem Arbeitsbereich der im betreffenden Fall verwendeten Prüfeinrichtung ab. Bei der Auswahl der jeweiligen Prüfbedingungen müssen die Anforderungen der Produktnormen für Asphalt berücksichtigt werden. Die Anwendbarkeit dieses Dokumentes ist in den Produktnormen für Asphalt beschrieben.

Mélanges bitumineux - Méthodes d'essai pour mélange hydrocarboné à chaud - Partie 24: Résistance à la fatigue

La présente Norme européenne spécifie les méthodes qui sont utilisées pour caractériser la fatigue des mélanges bitumineux par différents types d'essais, dont des essais de flexion et des essais de traction directe et indirecte. Les essais sont réalisés sur des matériaux bitumineux compactés, au moyen d'une charge sinusoïdale ou d'une autre charge contrôlée, en utilisant différents types d'éprouvettes et de supports.
La procédure est utilisée :
a)   pour classer les mélanges bitumineux selon leur résistance à la fatigue ;
b)   comme guide comparatif des performances dans les structures de chaussée ;
c)   pour obtenir des données permettant d'estimer le comportement structurel du matériau de la chaussée ; et
d)   pouvoir juger les résultats d'essais en fonction des spécifications des mélanges bitumineux.
Comme la présente Norme européenne n'impose pas un type de dispositif d'essai particulier, le choix précis des conditions d'essai dépend des possibilités et de la plage de fonctionnement du dispositif utilisé. Pour le choix des conditions d'essai spécifiques, il est nécessaire de respecter les critères des normes produit des mélanges bitumineux. L'applicabilité du présent document est décrite dans les normes produit des mélanges bitumineux.

Bitumenske zmesi - Preskusne metode - 24. del: Odpornost proti utrujanju

Ta evropski standard določa metode za karakterizacijo utrujenosti bitumenskih zmesi z alternativnimi preskusi, skupaj s preskusi upogiba ter preskusi direktne in indirektne nateznosti. Preskusi se izvajajo na zgoščenem bitumenskem materialu pod sinusnim obremenjevanjem ali pod nadzorovanim obremenjevanjem z različnimi vrstami preskušancev in podpor.
Postopek se uporablja:
a) za razvrščanje bitumenskih zmesi na podlagi odpornosti proti utrujanju;
b) kot smernica v zvezi z relativnimi lastnostmi v voziščni konstrukciji;
c) za pridobivanje podatkov z namenom vrednotenja strukturnega obnašanja ceste; in
d) za ocenjevanje preskusnih podatkov glede na specifikacije bitumenskih zmesi.
Ker ta evropski standard ne predpisuje posebne preskusne naprave, je natančna izbira preskusnih pogojev odvisna od možnosti in delovnega obsega uporabljene naprave. Pri izbiri specifičnih preskusnih pogojev je treba upoštevati standarde za izdelke za bitumenske zmesi. Uporabnost tega dokumenta je opisana v standardih za izdelke za bitumenske zmesi.
Rezultati, pridobljeni z različnimi preskusnimi metodami ali z uporabo različnih meril odpovedi, niso nujno primerljivi.

General Information

• Status: Published
• Publication Date: 19-Jun-2018
• Withdrawal Date: 30-Dec-2018
• ICS: 93.080.20 - Road construction materials
• Technical Committee: CEN/TC 227 - Road materials
• Drafting Committee: CEN/TC 227/WG 1 - Bituminous mixtures
• Ref Project: SIST EN 12697-24:2018 - Bituminous mixtures - Test methods - Part 24: Resistance to fatigue

Relations

• Replaces: EN 12697-24:2012 - Bituminous mixtures - Test methods for hot mix asphalt - Part 24: Resistance to fatigue
• Effective Date: 08-Jul-2015

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2018
1DGRPHãþD
SIST EN 12697-24:2012
Bitumenske zmesi - Preskusne metode - 24. del: Odpornost proti utrujanju
Bituminous mixtures - Test methods - Part 24: Resistance to fatigue
Asphalt - Prüfverfahren - Teil 24: Beständigkeit gegen Ermüdung
Mélanges bitumineux - Méthodes d'essai pour mélange hydrocarboné à chaud - Partie
24 : Résistance à la fatigue
Ta slovenski standard je istoveten z: EN 12697-24:2018
ICS:
93.080.20 Materiali za gradnjo cest Road construction materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 12697-24
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2018
EUROPÄISCHE NORM
ICS 93.080.20 Supersedes EN 12697-24:2012
English Version
Bituminous mixtures - Test methods - Part 24: Resistance
to fatigue
Mélanges bitumineux - Méthodes d'essai pour mélange Asphalt - Prüfverfahren - Teil 24: Beständigkeit gegen
hydrocarboné à chaud - Partie 24: Résistance à la Ermüdung
fatigue
This European Standard was approved by CEN on 26 February 2018.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12697-24:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms, definitions, symbols and abbreviations . 5
3.1 General . 6
3.2 Two-point bending test on trapezoidal shaped specimens (2PB-TR) . 6
3.3 Two-point bending test on prismatic shaped specimens (2PB-PR) . 7
3.4 Three-point bending test on prismatic shaped specimens (3PB-PR) . 9
3.5 Four-point bending test on prismatic shaped specimens (4PB-PR) . 10
3.6 Symbols for indirect tensile test on cylindrical shaped specimens (IT-CY) . 15
3.7 Symbols for Cyclic Indirect tensile Test on cylindrical shaped specimen (CIT-CY) . 15
4 Sample preparation . 16
4.1 Storage of the specimens . 16
4.2 Drying of the specimens . 16
4.3 Dimensions and bulk density of the specimens . 17
5 Failure . 17
6 Selection test conditions . 17
7 Summary of the procedures . 17
7.1 Two-point bending test on trapezoidal shaped specimens (2PB-TR) . 17
7.2 Two-point bending test on prismatic shaped specimens (2PB-PR) . 17
7.3 Three-point bending test on prismatic shaped specimens (3PB-PR) . 17
7.4 Four-point bending test on prismatic shaped specimens (4PB-PR) . 18
7.5 Indirect tensile test on cylindrical shaped specimens (IT-CY) . 18
7.6 Cyclic Indirect tensile test on cylindrical shaped specimens (CIT-CY) . 18
8 Checking of the testing equipment . 18
9 Test report . 19
Annex A (normative) Two-point bending test on trapezoidal shaped specimens (2PB-TR) . 20
A.1 Principle . 20
A.2 Equipment . 21
A.3 Specimen preparation . 21
A.4 Procedure. 24
A.5 Calculation and expression of results . 25
A.6 Test report . 26
A.7 Precision . 26
Annex B (normative) Two-point bending test on prismatic shaped specimens (2PB-PR) . 28
B.1 Principle . 28
B.2 Equipment . 28
B.3 Specimen preparation . 29
B.4 Procedure. 29
B.5 Calculation and expression of results . 30
B.6 Test report . 32
B.7 Precision . 32
Annex C (normative) Three-point bending test on prismatic shaped specimens (3PB-PR) . 33
C.1 Principle . 33
C.2 Equipment . 33
C.3 Specimen preparation . 34
C.4 Procedure . 34
C.5 Calculation and expression of results . 35
C.6 Test report . 38
C.7 Precision . 39
Annex D (normative) Four-point bending test on prismatic shaped specimens (4PB-PR) . 40
D.1 Principle . 40
D.2 Equipment . 42
D.3 Specimen preparation . 43
D.4 Procedure . 44
D.5 Calculation and expression of results . 46
D.6 Test report . 46
D.7 Precision . 47
Annex E (normative) Indirect tensile test on cylindrical shaped specimens (IT-CY) . 48
E.1 Principle . 48
E.2 Equipment . 48
E.3 Specimen preparation . 51
E.4 Procedure . 52
E.5 Calculation and reporting of results . 53
E.6 Test report . 56
E.7 Precision . 56
Annex F (normative) Cyclic indirect tensile test on cylindrical shaped specimens (CIT-CY) . 57
F.1 Principle . 57
F.2 Equipment . 57
F.3 Specimen preparation . 59
F.4 Procedure . 60
F.5 Calculation and reporting of results . 62
F.6 Test report . 63
F.7 Precision . 63
Bibliography . 64

European foreword
This document (EN 12697-24:2018) has been prepared by Technical Committee CEN/TC 227 “Road
materials”, the secretariat of which is held by DIN.
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 December 2018, and conflicting national standards
shall be withdrawn at the latest by December 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN not be held responsible for identifying any or all
...