SIST EN 12697-45:2020

Bituminous mixtures - Test methods - Part 45: Saturation Ageing Tensile Stiffness (SATS) conditioning test

This document specifies a test method to assess the durability of adhesion in base and binder course asphalt mixtures. The Saturation Ageing Tensile Stiffness (SATS) conditioning regime is used to age the specimens in the presence of water. A comparative test for assessing their performance before and after conditioning is also conducted.
The applicability of this test method is limited to bituminous specimens with consistent air voids contents and hard binder, in particular, to asphalt concrete mixtures with a binder content between 3,5 % and 5,5 %, air voids contents between 6 % and 10 % and 10/20 pen hard paving grade bitumen.
The test is intended to be used as a screening test for the assessment of a combination of aggregate, filler and additives with respect to the retained adhesion properties after simulated ageing in a moist atmosphere for lean/stiff base and binder course mixtures.

Asphalt - Prüfverfahren - Teil 45: Alterungsprüfung an gesättigten Asphalt-Probekörpern (SATS-Prüfung)

Dieses Dokument legt ein Prüfverfahren zur Bewertung der Dauerhaftigkeit des Verbunds in Asphaltgemischen für Trag- und Binderschichten fest. Das für die Alterungsprüfungen an gesättigten Probekörpern (en: Saturation Ageing Tensile Stiffness, SATS) festgelegte Klimatisierungsregime wird angewendet, um die Probekörper in Anwesenheit von Wasser zu altern. Eine Vergleichsprüfung für die Bewertung der Leistung der Probekörper vor und nach der Klimatisierung wird ebenfalls durchgeführt.
Die Anwendbarkeit dieses Prüfverfahrens ist auf bitumenhaltige Probekörper mit gleichbleibendem Hohlraumgehalt und hartem Bindemittel beschränkt, insbesondere auf Asphaltgemische mit einem Bindemittelgehalt zwischen 3,5 % und 5,5 %, einem Hohlraumgehalt zwischen 6 % und 10 % und aus Straßenbaubitumen mit einem Härtegrad von 10/20 pen.
Diese Prüfung ist als Auswahlprüfung für die Bewertung einer Kombination von Gesteinskörnungen, Füller und Zusatzmitteln im Hinblick auf die nach simulierter Alterung in einer feuchten Atmosphäre verblei¬benden Verbundeigenschaften von mageren/starren Mischgütern für Trag- und Binderschichten vorge¬sehen.

Mélanges bitumineux - Méthodes d'essai - Partie 45: Saturation vieillissant l'essai de tension de la rigidité (SATS)

Ce document spécifie une méthode d'essai permettant d'évaluer la durabilité de l'adhésivité dans les mélanges bitumineux pour couche de base et couche de liaison.  L’essai de module en traction après un protocole de vieillissement en conditions saturées (Essai SATS : Saturation Ageing Tensile Stiffness) est utilisé pour vieillir les éprouvettes en présence d'eau. Un essai comparatif permettant d'évaluer leurs performances avant et après conditionnement est également réalisé.
L'applicabilité de cette méthode d'essai est limitée aux éprouvettes bitumineuses ayant des teneurs en vides conséquentes et à base de bitume de grades durs, en particulier, les mélanges pour enrobés bitumineux ayant une teneur en liant comprise entre 3,5 % et 5,5 %, des teneurs en vides comprises entre 6 % et 10 % et les bitumes routiers de grade dur 10/20.
L'essai est destiné à servir d'essai crible afin d’évaluer une combinaison de granulats, de filler et d’additifs en ce qui concerne la durabilité des propriétés d’adhésivité après un vieillissement simulé dans une atmosphère humide pour les mélanges rigides et pauvres en liant pour couche de base et couche de liaison.

Bitumenske zmesi - Preskusne metode - 45. del: Preskus staranja na zasičenih asfaltnih preskušancih (preskus SATS)

General Information

• Status: Published
• Public Enquiry End Date: 19-Feb-2019
• Publication Date: 30-Mar-2020
• ICS: 93.080.20 - Road construction materials
• Technical Committee: CES - Roads
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 05-Mar-2020
• Due Date: 10-May-2020
• Completion Date: 31-Mar-2020
• Ref Project: EN 12697-45:2020 - Bituminous mixtures - Test methods - Part 45: Saturation Ageing Tensile Stiffness (SATS) conditioning test

Relations

• Replaces: SIST EN 12697-45:2012 - Bituminous mixtures - Test methods for hot mix asphalt - Part 45: Saturation Ageing Tensile Stiffness (SATS) conditioning test
• Effective Date: 01-May-2020

Overview

EN 12697-45:2020 - Saturation Ageing Tensile Stiffness (SATS) conditioning test (CEN) specifies a laboratory procedure to assess the durability of adhesion in base and binder course bituminous (asphalt) mixtures. The method uses a vacuum saturation step followed by pressurized, high-temperature conditioning in the presence of water to simulate moist ageing. A comparative stiffness test is performed before and after conditioning to produce a SATS durability index (ratio of conditioned to unconditioned stiffness).

Key topics and technical requirements

• Purpose: Screening test for retained adhesion properties of aggregate + filler + binder + additives in lean/stiff base and binder course mixtures.
• Applicability limits: Intended for mixtures with hard binders (e.g., 10/20 pen paving grade bitumen), binder content ~3.5–5.5%, and air voids typically 6–10% (sample preparation targets 8 ± 2%).
• Specimens: Cylinders of (100 ± 5) mm diameter × (60 ± 5) mm thickness, cored from slabs or produced by roller, gyratory or impact compaction (EN 12697‑33, ‑31, ‑30).
• Conditioning regime (SATS):
  • Partial vacuum saturation, then placement on a specimen tray above water in a stainless‑steel pressure vessel.
  • Conditioning at 85 °C and 2.1 MPa for 65 h (specimens are exposed to elevated temperature and pressure in moist atmosphere).
  • Tray accommodates five specimens; four positioned above water are averaged for result, the fifth submerged for additional info.
• Comparative test: Indirect tensile stiffness modulus (IT‑CY) per EN 12697‑26 Annex C is the default comparative measurement; other valid comparative tests may be used.
• Equipment & controls: Vacuum desiccator, pressure/temperature vessel with temperature control (±0.5 °C), pressure regulator and safety valves, porous disc, accurate weighing, and temperature logging.
• Output metrics: Saturation before/after conditioning, unconditioned and conditioned stiffness, and stiffness ratio (conditioned/unconditioned) as the SATS durability index.

Applications and users

• Used by pavement and materials engineers, highway agencies, construction laboratories, mix designers, QA/QC teams and researchers to:
  • Screen aggregate–binder–additive combinations for moisture susceptibility and adhesion durability.
  • Evaluate anti‑stripping additives or coupling agents.
  • Support specification development and pre‑qualification of mixes for base and binder course layers. Note: SATS is a screening tool - not a direct prediction of in‑service performance - and is limited to the defined mixture types and binder grades.

Related standards

• EN 12697‑5 (maximum density), EN 12697‑6 (bulk density), EN 12697‑8 (voids), EN 12697‑26 (stiffness), EN 12697‑30/31/33 (specimen preparation).

Keywords: EN 12697‑45:2020, SATS, Saturation Ageing Tensile Stiffness, bituminous mixtures, asphalt durability test, adhesion durability, moisture susceptibility, indirect tensile stiffness.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2020
Nadomešča:
SIST EN 12697-45:2012
Bitumenske zmesi - Preskusne metode - 45. del: Preskus staranja na
zasičenih asfaltnih preskušancih (preskus SATS)
Bituminous mixtures - Test methods - Part 45: Saturation Ageing Tensile Stiffness
(SATS) conditioning test
Asphalt - Prüfverfahren - Teil 45: Alterungsprüfung an gesättigten Asphalt-Probekörpern
(SATS-Prüfung)
Mélanges bitumineux - Méthodes d'essai - Partie 45: Saturation vieillissant l'essai de
tension de la rigidité (SATS)
Ta slovenski standard je istoveten z: EN 12697-45:2020
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 12697-45
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2020
EUROPÄISCHE NORM
ICS 93.080.20 Supersedes EN 12697-45:2012
English Version
Bituminous mixtures - Test methods - Part 45: Saturation
Ageing Tensile Stiffness (SATS) conditioning test
Mélanges bitumineux - Méthodes d'essai - Partie 45 : Asphalt - Prüfverfahren - Teil 45: Alterungsprüfung an
Essai de module en traction après saturation gesättigten Asphalt-Probekörpern (SATS-Prüfung)
conditionnée (SATS)
This European Standard was approved by CEN on 18 November 2019.

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, 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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12697-45:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Principle . 5
5 Apparatus . 5
5.1 Sample manufacture . 5
5.2 Conditioning regime. 5
5.3 Comparative test . 9
6 Solvent and other materials . 9
7 Sample preparation . 9
8 Conditioning procedure . 11
9 Comparative test procedure . 12
10 Calculation . 12
10.1 Bulk density and air voids content . 12
10.2 Saturation before conditioning . 13
10.3 Saturation after conditioning . 13
10.4 Stiffness ratio . 13
11 Test report . 14
12 Precision . 15
Bibliography . 16

European foreword
This document (EN 12697-45:2020) 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 August 2020, and conflicting national standards shall
be withdrawn at the latest by August 2020.
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 12697-45:2012.
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;
— [ge] editorial update according to current standard template;
— [ge] dated references for test methods deleted in relevant places;
— [ge] NOTES modified and adjusted to normal text and vice versa where appropriate according to
ISO/IEC Directives – Part 2:2016, 24.5;
— [Clause 1] irrelevant NOTE deleted, indicating a future development of alternative conditions not
covered by this document;
— [Clause 2] titles for test methods EN 12697-serie adjusted;
— [Bibliography] test methods referred to in normal text moved to Clause 2 Normative references.
A list of all parts in the EN 12697 series 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, Turkey and the
United Kingdom.
1 Scope
This document specifies a test method to assess the durability of adhesion in base and binder course
asphalt mixtures. The Saturation Ageing Tensile Stiffness (SATS) conditioning regime is used to age the
specimens in the presence of water. A comparative test for assessing their performance before and after
conditioning is also conducted.
The applicability of this test method is limited to bituminous specimens with consistent air voids
contents and hard binder, in particular, to asphalt concrete mixtures with a binder content between
3,5 % and 5,5 %, air voids contents between 6 % and 10 % and 10/20 pen hard paving grade bitumen.
The test is intended to be used as a screening test for the assessment of a combination of aggregate,
filler and additives with respect to the retained adhesion properties after simulated ageing in a moist
atmosphere for lean/stiff base and binder course mixtures.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
EN 12697-5, Bituminous mixtures — Test methods — Part 5: Determination of the maximum density
EN 12697-6, Bituminous mixtures — Test methods — Part 6: Determination of bulk density of bituminous
specimens
EN 12697-8, Bituminous mixtures — Test methods — Part 8: Determination of void characteristics of
bituminous specimens
EN 12697-26:2018, Bituminous mixtures — Test methods — Part 26: Stiffness
EN 12697-30, Bituminous mixtures — Test methods — Part 30: Specimen preparation by impact
compactor
EN 12697-31, Bituminous mixtures — Test methods — Part 31: Specimen preparation by gyratory
compactor
EN 12697-33, Bituminous mixtures — Test method — Part 33: Specimen prepared by roller compactor
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 12697-5, EN 12697-6 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp/ui
3.1
saturation before conditioning
saturation of the mixture, determined as the calculated proportion of air voids filled with water after
partial vacuum saturation, prior to conditioning by storage under increased pressure and elevated
temperature, in percent
3.2
unconditioned stiffness
stiffness modulus of the mixture as determined in accordance with EN 12697-26:2018, Annex C, prior
to conditioning by storage under increased pressure and elevated temperature
Note 1 to entry: Alternative comparative tests can be used (see 9.2).
3.3
conditioned stiffness
stiffness modulus of the mixture as determined in accordance with EN 12697-26:2018, Annex C, after
conditioning by storage under increased pressure and elevated temperature
3.4
stiffness ratio
ratio of the conditioned stiffness to the unconditioned stiffness
3.5
saturation after conditioning
saturation of the mixture, determined as the calculated proportion of air voids filled with water after
conditioning by storage under increased pressure and elevated temperature, in percent
4 Principle
Nominally identical test specimens are subjected to moisture saturation by a vacuum system. They are
then transferred into a pressurized vessel partially filled with water where they are subjected to a
conditioning procedure by storage at 85 °C temperature and 2,1 MPa pressure for 65 h. The ratios of the
stiffness, measured by indirect tension on cylindrical specimens, before and after conditioning by
storage under increased pressure and elevated temperature on the individual specimens situated above
the water are averaged to determine the sensitivity of the material to ageing and moisture. The whole
process is referred to as the Saturation Ageing Tensile Stiffness (SATS) conditioning test. The average
ratio is the SATS durability index of the mixture components when the comparative test is the indirect
tensile stiffness modulus.
NOTE Tests other than stiffness by indirect tension on cylindrical specimens can be used as the comparative
test (see 9.2).
5 Apparatus
5.1 Sample manufacture
5.1.1 Asphalt mixer.
5.1.2 Coring equipment.
5.1.3 Saw for cutting asphalt.
5.2 Conditioning regime
5.2.1 Vacuum desiccator and vacuum pump, including manometer or calibrated vacuum gauge in
accordance with EN 12697-5.
5.2.2 Balance with a capacity greater than the mass of a sample that is accurate to 0,1 g.
5.2.3 Pressure/temperature vessel designed to operate at (2,1 ± 0,1) MPa between 80 °C and
115 °C and which shall be made from stainless steel, having internal dimensions adequate to contain
the specimen tray (see 5.2.7) and an integral temperature control system that is capable of:
a) bringing the loaded pressurized vessel to the desired conditioning temperature ± 0,5 °C, as
recorded by a suitable thermometer inside the vessel, within 2 h;
b) maintaining the temperature at all points within the vessel at the ageing temperature ± 0,5 °C.
SAFETY PRECAUTIONS — The pressure ageing vessel operates at high temperatures and high
pressures. All safety guidelines issued by equipment manufacturers shall be adhered to.
5.2.4 Pressure controlling devices
5.2.4.1 Pressure release valve, which prevents pressure in the vessel from exceeding 2,5 MPa
during the ageing procedure.
5.2.4.2 Pressure regulator, capable of controlling the pressure within the vessel to ± 0,1 MPa and
with a capacity sufficient to reduce the pressure from the source of compressed air so that the pressure
within the vessel is maintained at the operating pressure of (2,1 ± 0,1) MPa.
5.2.4.3 Slow release bleed valve, which allows the pressure in the vessel at the completion of the
test to be reduced from the 2,1 MPa operating pressure, to atmospheric pressure within 20 min to
30 min.
5.2.4.4 Pressure gauge, capable of measuring the pressure within the vessel to within 0,3 MPa
during the test. The pressure gauge shall be calibrated to an accuracy of ± 0,1 MPa at appropriate
intervals.
5.2.4.5 Porous disc, 5 mm thick by 100 mm diameter, with a permeability substantially greater
than that of the asphalt and the capability withstand the maximum vertical pressure likely to be
imposed. The discs shall be checked before each use to ensure that they are not clogged by particles.
They shall be boiled for at least 10 min in distilled water before use and kept immersed in de-aerated
water until required.
5.2.5 Thermometer, accurate to 0,1 °C, for measuring the temperature inside the pressure vessel.
NOTE A resistance thermal detector (RTD) has been found to be suitable.
5.2.6 Temperature recording device, data acquisition system capable of recording the temperature
throughout the test to 0,1 °C.
NOTE The current method of monitoring temperature is via a computerized log of time and temperature. It is
assumed the temperature recorded is that which is to be found within every point within the ageing vessel.
Dimensions in millimetres
Key
1 pressure regulator
2 compressed air cylinder
3 pressure vessel
Figure 1 — Schematic diagram and dimensions of typical pressure vessel
5.2.7 Specimen tray, having the form and dimensions specified in Figure 2, to accommodate five test
specimens for a full test. The tray shall sit in the pressure vessel on top of a porous disc, as shown in
Figure 3.
The
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