EN 12697-26:2004
(Main)Bituminous mixtures - Test methods for hot mix asphalt - Part 26: Stiffness
Bituminous mixtures - Test methods for hot mix asphalt - Part 26: Stiffness
This document specifies the methods for characterising the stiffness of bituminous mixtures by 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 to rank bituminous mixtures on the basis of stiffness, as a guide to relative performance in the pavement, to obtain data for estimating the structural behaviour in the road and to judge test data according to specifications for bituminous mixtures.
As this 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 used device.
For the choice of specific test conditions, the requirements of the product standards for bituminous mixtures shall be respected.
The applicability of this document is described in the product standards for bituminous mixtures.
Asphalt - Prüfverfahren für Heißasphalt - Teil 26: Steifigkeit
Die vorliegende Norm beschreibt das Verfahren zur Bewertung von Prüfungen, deren Ziel es ist, die Steifigkeitseigenschaften von Asphalt zu kennzeichnen. Solche Prüfungen werden an verdichteten bitumenhaltigen Baustoffen unter einer sinusförmigen oder anderen geregelten Belastung unter Verwendung unterschiedlicher Typen von Probekörpern und Tragwerken ausgeführt. Die anwendbaren Prüfverfahren sind im Abschnitt 5 zusammengestellt.
Mélanges bitumineux - Méthodes d'essai pour mélange hydrocarboné à chaud - Partie 26: Module de rigidité
Le présent document spécifie les méthodes de caractérisation de la rigidité des mélanges hydrocarbonés à l'aide d'essais au choix, comprenant des essais de flexion et des essais de traction directe et indirecte. Les essais sont réalisés sur un matériau bitumineux compacté soumis à une charge sinusoïdale ou à d'autres charges contrôlées, utilisant différents types d'éprouvettes et de supports.
La procédure est utilisée pour classer les mélanges hydrocarbonés en fonction de leur module de rigidité, pour servir de guide pour les performances relatives dans les chaussées, pour disposer de données utilisées pour estimer le comportement structurel des chaussées et juger les résultats d'essais en fonction des spécifications concernant les mélanges hydrocarbonés.
Cette norme n'imposant pas de type particulier d'appareillage d'essai, le choix spécifique des conditions d'essai dépend des capacités et du domaine d'emploi de l'appareillage utilisé.
Pour le choix des conditions d'essai spécifiques, les exigences des normes produit sur les mélanges hydrocarbonés doivent être respectées.
L'applicabilité de cette Norme européenne est décrite dans les normes produit sur les mélanges hydrocarbonés.
Bitumenske zmesi – Preskusne metode za vroče asfaltne zmesi – 26. del: Togost
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Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2005
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Bituminous mixtures - Test methods for hot mix asphalt - Part 26: Stiffness
Asphalt - Prüfverfahren für Heißasphalt - Teil 26: Steifigkeit
Mélanges bitumineux - Méthodes d'essai pour mélange hydrocarboné a chaud - Partie
26: Module de rigidité
Ta slovenski standard je istoveten z: EN 12697-26:2004
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.
EUROPEAN STANDARD
EN 12697-26
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2004
ICS 93.080.20
English version
Bituminous mixtures - Test methods for hot mix asphalt - Part
26: Stiffness
Mélanges bitumineux - Méthodes d'essai pour mélange Asphalt - Prüfverfahren für Heißasphalt - Teil 26: Steifigkeit
hydrocarboné à chaud - Partie 26: Rigidité
This European Standard was approved by CEN on 1 April 2004.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2004 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12697-26:2004: E
worldwide for CEN national Members.
Contents
page
1 Scope .7
2 Normative references .7
3 Terms, definitions and symbols.7
3.1 Terms and definitions .7
3.2 Symbols .8
4 Principle.9
5 Sinusoidal loading.9
5.1 Test methods.9
5.1.1 General.9
5.1.2 Bending tests .10
5.1.3 lndirect tensile test .10
5.1.4 Direct uniaxial tests.10
5.2 Loading conditions.10
5.3 Load amplitudes .10
5.4 Loading frequencies.11
6 Controlled strain rate loading.11
6.1 Test method.11
6.2 Loading conditions.11
6.3 Strain amplitudes.11
6.3.1 Preliminary test.11
6.3.2 Strain amplitudes during the test.12
6.4 Test loading times .12
7 Temperatures .12
8 Expression of results .12
9 Test report .14
9.1 General.14
9.2 Information on specimen .15
9.3 Information on test method .15
9.4 Information on the test and results.15
9.5 Optional information .15
10 Precision.15
Annex A (normative) Two point bending test on trapezoidal specimens (2PB-TR) or on prismatic
specimens (2PB-PR).17
A.1 Principle.17
A.2 Equipment .17
A.3 Specimen preparation .18
A.4 Mode of operation.19
A.4.1 Stabilising the specimen.19
A.4.2 Procedure .19
Annex B (normative) Three point bending test on prismatic specimens (3PB-PR) and four point
bending test on prismatic specimens (4PB-PR).21
B.1 Principle.21
B.2 Equipment .22
B.3 Specimen preparation .23
B.3.1 Dimensions .23
B.3.2 Sample manufacture .23
B.4 Mode of operation .24
B.4.1 Stabilising the specimen .24
B.4.2 Procedure.24
Annex C (normative) Test applying Indirect tension to cylindrical specimens (IT-CY).26
C.1 Principle.26
C.2 Equipment .26
C.2.1 General devices .26
C.2.2 Test equipment .26
C.3 Specimen preparation.31
C.3.1 Preparation.31
C.3.2 Storage conditions.31
C.4 Mode of operation .32
C.4.1 Conditioning and test temperature.32
C.4.2 Mounting the specimen .32
C.4.3 Stiffness measurement.33
Annex D (normative) Direct tension-compression test on cylindrical specimens (DTC-CY) .35
D.1 Principle.35
D.2 Equipment .35
D.3 Specimen preparation.35
D.4 Mode of operation .37
D.4.1 Stabilising the specimen .37
D.4.2 Procedure.37
Annex E (normative) Test applying direct tension to cylindrical specimens (DT-CY) or to
prismatic specimens (DT-PR) .38
E.1 Principle.38
E.2 Equipment .38
E.3 Specimen preparation.38
E.3.1 Cylindrical specimen.38
E.3.2 Prismatic specimen.39
E.4 Mode of operation .39
E.4.1 Stabilisation of the specimen.39
E.4.2 Procedure.40
E.5 Derivation of the master-curve .41
E.5.1 Isotherms.41
E.5.2 Master curve at a fixed temperature.42
E.6 Determination of the stiffness modulus for the fixed loading time .44
Foreword
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