EN 12697-12:2018

Bituminous mixtures - Test methods - Part 12: Determination of the water sensitivity of bituminous specimens

This European Standard specifies three test methods for determining the effect of saturation and accelerated water conditioning:
-   method A uses the indirect tensile strength of cylindrical specimens of bituminous mixtures;
-   method B uses the compression strength of cylindrical specimens of bituminous mixtures;
-   method C defines the bonding value for a bituminous mixture 1 h after mixing, where the bonding of bitumen and aggregate can be equated to a bonding value.
Method C is suitable for soft asphalt with bitumen of kinematic viscosity at 60 °C of 4 000 mm2/s or less.
These methods can be used to evaluate the effect of water on asphalt mixtures with or without anti-stripping additives including liquids, such as amines; and fillers, such as hydrated lime or cement.

Asphalt - Prüfverfahren - Teil 12: Bestimmung der Wasserempfindlichkeit von Asphalt-Probekörpern

Diese Europäische Norm legt drei Prüfverfahren zur Bestimmung des Einflusses der Wassersättigung und der beschleunigten Klimatisierung durch Wasserlagerung fest:
-   Verfahren A dient zur Prüfung der indirekten Zugfestigkeit von zylindrischen Asphalt-Probekörpern;
-   Verfahren B dient zur Prüfung der Druckfestigkeit von zylindrischen Asphalt-Probekörpern;
-   Verfahren C dient zur Bestimmung des Haftvermögens eines Asphaltmischgutes 1 h nach dem Mischen, wobei das Haften von Bitumen auf der Gesteinskörnung als Haftwert bezeichnet wird.
Verfahren C eignet sich für Softasphalt mit Bitumen einer kinematischen Viskosität von höchstens 4 000 mm2/s bei 60 °C.
Diese Verfahren können zur Bewertung des Effekts dienen, den Wasser auf Asphaltmischungen mit oder ohne haftungsverbessernde(n) Zusätze(n), einschließlich Flüssigkeiten, wie z. B. Aminen, und Füllstoffe(n), wie z. B. Kalkhydrat oder Zement, hat.

Mélanges bitumineux - Méthodes d’essai - Partie 12 : Détermination de la sensibilité à l'eau des éprouvettes bitumineuses

La présente Norme européenne spécifie trois méthodes d'essai pour déterminer l'effet d'une saturation et d'une conservation accélérée dans l'eau.
- la méthode A utilise la résistance à la traction indirecte des éprouvettes cylindriques de mélanges bitumineux ;
- la méthode B utilise la résistance à la compression des éprouvettes cylindriques de mélanges bitumineux ;
- la méthode C définit la valeur d'adhésivité des mélanges bitumineux 1 h après mélange,
lorsque l'adhésivité du bitume et du granulat peut être assimilée à une valeur d‘adhésivité.
La méthode C est applicable aux mélanges bitumineux souples avec un bitume ayant une viscosité cinématique à 60 °C inférieure ou égale à 4 000 mm2/s.
Ces modes opératoires peuvent servir à l'évaluation de l'effet de l'eau sur les enrobés avec ou sans dopes d'adhésivité aussi bien sous forme de liquides comme les amines que de fillers comme la chaux hydratée ou le ciment.

Bitumenske zmesi - Preskusne metode - 12. del: Ugotavljanje občutljivosti bitumenskih preskušancev za vodo

Ta evropski standard opisuje tri preskusne metode za ugotavljanje vpliva nasičenosti in pospešenega vodnega pogojevanja.
Metode je mogoče uporabiti za vrednotenje vpliva vlage z aditivi proti luščenju ali brez njih, vključno s tekočinami, kot so amini, in polnili, kot je hidratizirano apno ali cement:
- metoda A uporablja indirektno natezno trdnost valjastih preskušancev bitumenskih zmesi;
- metoda B uporablja tlačno trdnost valjastih preskušancev bitumenskih zmesi;
- metoda C definira vrednost vezave mehkih asfaltnih zmesi 1 h po mešanju, pri čemer je vezava bitumna in agregata enakovredna vrednosti vezave.
Metodi A in B v povprečju dajeta iste rezultate. Vendar pa metoda B ni primerna, če je koeficient vitkosti manjši od 0,5.  
Metoda C je primerna za mehke asfaltne zmesi z bitumnom z viskoznostjo 4000 mm2/s pri 60 °C, za katero metodi A in B nista primerni.
OPOMBA:    Metodi A in B sta primerni za mehke asfaltne zmesi z bitumnom z viskoznostjo pri 60 °C, večjo od 4000 mm2/s.

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
• Current Stage: 9092 - Decision on results of review/2YR ENQ - revise - Review Enquiry
• Start Date: 01-Oct-2024
• Completion Date: 14-Apr-2025
• Ref Project: SIST EN 12697-12:2018 - Bituminous mixtures - Test methods - Part 12: Determination of the water sensitivity of bituminous specimens

Relations

• Replaces: EN 12697-12:2008 - Bituminous mixtures - Test methods for hot mix asphalt - Part 12: Determination of the water sensitivity of bituminous specimens
• Effective Date: 08-Jun-2022

Overview

EN 12697-12:2018 - "Bituminous mixtures - Test methods - Part 12: Determination of the water sensitivity of bituminous specimens" is a CEN standard that specifies three laboratory test methods to assess how water affects bituminous (asphalt) mixtures. The standard covers saturation and accelerated water conditioning of cylindrical specimens and provides procedures to measure strength loss or bonding reduction caused by moisture. It is applicable to mixtures with or without anti‑stripping additives and includes a specific method for soft asphalt binders (kinematic viscosity at 60 °C ≤ 4 000 mm²/s).

Key Topics and Requirements

• Three test methods
  • Method A - Indirect Tensile Strength (ITS) of cylindrical specimens; used to compute an indirect tensile strength ratio reflecting moisture damage.
  • Method B - Compression strength of cylindrical specimens; used to compute a compressive strength ratio after conditioning.
  • Method C - Bonding value measured 1 hour after mixing; suited for soft asphalt (viscosity criterion above). Bonding value represents initial bitumen–aggregate adhesion.
• Specimen types and preparation
  • Cylindrical specimens with defined dimensions and compaction methods (static or dynamic) and requirements for bulk density and dimensional measurement.
• Conditioning procedures
  • Defined dry and wet conditioning subsets, vacuum saturation or water immersion, and accelerated water exposure to simulate field moisture effects.
• Calculations and reporting
  • Procedures for calculating specimen volume, degree of swelling, ITS ratio, compressive strength ratio, and bonding value; reporting requirements and precision statements are included.
• Compatibility with additives
  • Methods can evaluate the effectiveness of anti‑stripping additives (liquid amines, hydrated lime, cement fillers).

Applications

EN 12697-12:2018 is used for:

• Pavement materials testing and quality control - assessing moisture susceptibility during production and acceptance testing.
• Mixture design and development - comparing formulations and anti‑stripping treatments to improve durability.
• Research and performance evaluation - studying moisture-related distress mechanisms and validating new additives or binder grades.
• Contracting and specifications - providing objective metrics (strength ratios, bonding values) for contract compliance and performance-based specifications.

Typical users: highway authorities, materials testing laboratories, pavement engineers, contractors, asphalt producers, and researchers.

Related Standards

Normative references in EN 12697-12:2018 include other EN 12697 series methods commonly used in asphalt testing, such as:

• EN 12697-5, EN 12697-6, EN 12697-7, EN 12697-8, EN 12697-23, EN 12697-27, EN 12697-29, EN 12697-30.

Keywords: EN 12697-12:2018, water sensitivity, bituminous mixtures, indirect tensile strength, compression strength, bonding value, anti‑stripping additives, soft asphalt.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2018
1DGRPHãþD
SIST EN 12697-12:2009
OMLYRVWL%LWXPHQVNH]PHVL3UHVNXVQHPHWRGHGHO8JRWDYOMDQMHREþXW
ELWXPHQVNLKSUHVNXãDQFHY]DYRGR
Bituminous mixtures - Test methods - Part 12: Determination of the water sensitivity of
bituminous specimens
Asphalt - Prüfverfahren - Teil 12: Bestimmung der Wasserempfindlichkeit von Asphalt-
Probekörpern
Mélanges bitumineux - Méthodes d'essai - Partie 12: Détermination de la sensibilité à
l'eau des éprouvettes bitemineuses
Ta slovenski standard je istoveten z: EN 12697-12:2018
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 12697-12
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2018
EUROPÄISCHE NORM
ICS 93.080.20 Supersedes EN 12697-12:2008
English Version
Bituminous mixtures - Test methods - Part 12:
Determination of the water sensitivity of bituminous
specimens
Mélanges bitumineux - Méthodes d'essai - Partie 12: Asphalt - Prüfverfahren - Teil 12: Bestimmung der
Détermination de la sensibilité à l'eau des éprouvettes Wasserempfindlichkeit von Asphalt-Probekörpern
bitemineuses
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 12697-12:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Principle . 7
5 Method A. 8
5.1 Apparatus . 8
5.1.1 Compression testing machine . 8
5.1.2 Vacuum system . 8
5.1.3 Vacuum container . 8
5.1.4 Water bath . 8
5.1.5 Air chamber . 8
5.1.6 Other material . 8
5.2 Specimen preparation . 8
5.2.1 Number of specimens . 8
5.2.2 Dimensions of specimens . 8
5.2.3 Method of compaction . 9
5.2.4 Visual examination . 9
5.2.5 Measurement of dimensions . 9
5.2.6 Determination of bulk density . 9
5.2.7 Division into subsets . 9
5.2.8 Curing of specimens . 9
5.3 Conditioning . 9
5.3.1 Dry specimens . 9
5.3.2 Wet specimens . 9
5.4 Test procedure . 10
6 Method B . 11
6.1 Apparatus . 11
6.1.1 Compression testing machine . 11
6.1.2 Measuring device . 12
6.1.3 Vacuum system . 12
6.1.4 Vacuum container . 12
6.1.5 Water bath . 12
6.1.6 Air chamber . 12
6.1.7 Other material . 12
6.2 Specimen preparation . 13
6.2.1 Number of specimens . 13
6.2.2 Dimensions of specimens . 13
6.2.3 Method of compaction. 13
6.2.4 Visual examination . 13
6.2.5 Measurement of dimensions . 13
6.2.6 Determination of bulk density . 14
6.2.7 Division into subsets . 14
6.2.8 Curing of specimens . 14
6.3 Conditioning . 14
6.3.1 Dry specimens . 14
6.3.2 Wet specimens . 14
6.4 Test procedure . 14
7 Method C . 15
7.1 Apparatus . 15
7.1.1 Graduated glass beaker . 15
7.1.2 Rubber plug . 15
7.1.3 Filtering paper . 15
7.1.4 Collecting container . 15
7.1.5 Balance . 15
7.1.6 Container for drying the filtering paper . 15
7.1.7 Heating chamber . 15
7.2 Specimen preparation . 15
7.3 Test procedure . 15
8 Calculation . 16
8.1 Volume of cylindrical specimens . 16
8.2 Indirect tensile strength ratio (Method A) . 16
8.3 Compressive strength ratio (Method B) . 17
8.4 Bonding value (Method C) . 17
9 Test report . 17
9.1 Method A. 17
9.2 Method B. 18
9.3 Method C . 18
10 Precision . 18
10.1 Method A. 18
10.2 Method B. 19
10.3 Method C . 19
Bibliography . 20

European foreword
This document (EN 12697-12:2018) 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 such patent rights.
This document supersedes EN 12697-12:2008.
Compared with EN 12697-12:2008, the following changes have been made:
— the series title no longer makes the method exclusively for hot mix asphalt [Title];
— the structure of the standard has been altered, describing each method separately;
— description of Method A and Method B giving the same result deleted [1];
— restriction for slenderness, less than 0,5, of specimen for Method B deleted [1]. Added in 6.2.5 as
requirement;
— EN 12697-5 and EN 12697-7 added. EN 1246 and EN 13108-1 deleted [2];
— introduction of option for compaction with EN 12697-30 (2x50 blows) [5.2.3 b];
— tolerance changed for conditioning at 40 °C from ± 1 °C to ± 2 °C [5.3.2 b)];
— description added of procedure for determining specimen volume, used for calculation of degree of
swelling [5.3.2 e];
— changed conditioning temperature for soft grade bitumen [5.3.2 f];
— introduction of table with recommended test temperatures for Method A, depending on binder
grade [5.4, Table 1];
— description and requirements for compression testing machine and measuring device added for
[6.1];
— modification of tolerance for the constant load. Introduction of Table 2 with Static compaction
parameters [6.2.3].
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: 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 the United Kingdom.
1 Scope
This European Standard specifies three test methods for determining the effect of saturation and
accelerated water conditioning:
— method A uses the indirect tensile strength of cylindrical specimens of bituminous mixtures;
— method B uses the compression strength of cylindrical specimens of bituminous mixtures;
— method C defines the bonding value for a bituminous mixture 1 h after mixing, where the bonding
of bitumen and aggregate can be equated to a bonding value.
Method C is suitable for soft asphalt with bitumen of kinematic viscosity at 60 °C of 4 000 mm /s or
less.
These methods can be used to evaluate the effect of water on asphalt mixtures with or without anti-
stripping additives including liquids, such as amines; and fillers, such as hydrated lime or cement.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 12697-5, Bituminous mixtures — Test methods for hot mix asphalt — Part 5: Determination of the
maximum density
EN 12697-6, Bituminous mixtures — Test methods for hot mix asphalt — Part 6: Determination of bulk
density of bituminous specimens
EN 12697-7, Bituminous mixtures — Test methods for hot mix asphalt — Part 7: Determination of bulk
density of bituminous specimens by gamma rays
EN 12697-8, Bituminous mixtures — Test methods for hot mix asphalt — Part 8: Determination of void
characteristics of bituminous specimens
EN 12697-23, Bituminous mixtures — Test methods for hot mix asphalt — Part 23: Determination of the
indirect tensile strength of bituminous specimens
EN 12697-27, Bituminous mixtures — Test methods — Part 27: Sampling
EN 12697-29, Bituminous mixtures — Test method for hot mix asphalt — Part 29: Determination of the
dimensions of a bituminous specimen
EN 12697-30, Bituminous mixtures — Test methods for hot mix asphalt — Part 30: Specimen preparation
by impact compactor
EN 12697-31, Bituminous mixtures — Test methods for hot mix asphalt — Part 31: Specimen preparation
by gyratory compactor
EN 12697-32, Bituminous mixtures — Test methods — Part 32: Laboratory compaction of bituminous
mixtures by vibratory compactor
EN 12697-33, Bituminous mixtures — Test methods — Part 33: Specimen prepared by roller compactor.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
slenderness
height of a specimen divided by its diameter
3.2
indirect tensile strength ITS
maximum tensile stress according to EN 12697-23, calculated from the peak load applied to a
cylindrical specimen loaded diametrically until break at specified test conditions
3.3
indirect tensile strength ratio ITSR
ratio of the indirect tensile strength of wet (water conditioned) specimens to that of dry specimens,
expressed in percent
3.4
compressive strength ratio i/C
ratio of the strength of a specimen loaded in compression at the specified test temperature and speed of
displacement of the press, of wet (water conditioned) specimens to that of dry specimens expressed in
percent
3.5
water sensitivity in accordance with method A
ITSR value obtained on compacted specimens of a bituminous mixture
3.6
water sensitivity in accordance with method B
i/C value obtained on compacted specimens of a bituminous mixture
3.7
bonding value
amount of aggregate fines and bitumen which comes loose from 1 000 g sample of bituminous mixture
when mixed with 1 500 ml of water in a graduated glass beaker
4 Principle
Method A: Method A uses the indirect tensile strength of cylindrical specimens of bituminous mixtures.
A set of cylindrical test specimens is divided into two equally sized subsets and conditioned. One subset
is maintained dry at room temperature while the other subset is saturated and stored in water at
elevated conditioning temperature. After conditioning, the indirect tensile strength of each of the two
subsets is determined at a defined test temperature, depending on the grade of bitumen. The ratio of
the indirect tensile strength of the water conditioned subset compared to that of the dry subset is
determined and expressed in percent.
Method B: Method B uses the compression strength of cylindrical specimens of bituminous mixtures. A
set of cylindrical test specimens is divided into two equally sized subsets and conditioned. One subset is
maintained at 50 % humidity while the other subset is saturated and stored in water. After
conditioning, the compression strength of each of the two subsets is determined at 18 °C. The ratio of
the compression strength of the water conditioned subset compared to that of the dry subset is
determined and expressed in percent.
Method C: A sample of bituminous mixture and water is mixed. The amount of material that comes
loose is measured by filtering. The bonding value is the amount of dried aggregate fines and bitumen
left on the filtering paper measured in grams.
...