SIST EN 12697-15:2022

Bituminous mixtures - Test methods - Part 15: Determination of the segregation sensitivity

This document specifies a test method for the determination of the mixing quality and the tendency of segregation in composition of bituminous mixtures. This test method is considered suitable for mix-design purposes and for client information.
NOTE This test method is based on hot bituminous mixtures. There is no experience for other types of bituminous mixtures, e.g. asphalt concrete with bituminous emulsions.

Asphalt - Prüfverfahren - Teil 15: Bestimmung der Entmischungsneigung

Dieses Dokument legt ein Prüfverfahren zur Bestimmung der Mischungsgüte und Entmischungsneigung von Asphalt fest. Dieses Prüfverfahren gilt als geeignet sowohl für die Entwicklung von Mischungsverhältnissen als auch zur Information von Kunden.
ANMERKUNG   Dieses Prüfverfahren hat Heißasphalt zur Grundlage. Für sonstige Typen von Asphalt, wie z. B. Asphaltbeton mit Bitumenemulsion, liegen keine Erfahrungen vor.

Mélanges bitumineux - Méthodes d´essai - Partie 15: Détermination de la sensabilité à la ségrégation

Le présent document décrit une méthode d’essai pour la détermination de la qualité du mélange et de la tendance à la ségrégation dans la composition des mélanges bitumineux. Cette méthode d’essai est considérée comme adaptée à la formulation des mélanges et pour information aux clients.
NOTE Cette méthode d’essai est basée sur des mélanges bitumineux chauds. Il n’y a pas d’expérience pour d’autres types de mélanges bitumineux, par ex. béton bitumineux à l’émulsion.

Bitumenske zmesi - Preskusne metode - 15. del: Ugotavljanje občutljivosti na segregacijo

Ta dokument določa preskusno metodo za ugotavljanje kakovosti mešanja in nagnjenosti k segregaciji v sestavi vročih bitumenskih zmesi. Ta preskusna metoda je primerna za načrtovanje zmesi in informiranje naročnikov.
OPOMBA:   Ta preskusna metoda temelji na vročih bitumenskih zmeseh. Pri drugih vrstah bitumenskih zmesi (npr. bitumenski beton z bitumensko emulzijo) ni izkušenj.

General Information

• Status: Published
• Public Enquiry End Date: 19-Jan-2021
• Publication Date: 13-Mar-2022
• ICS: 93.080.20 - Road construction materials
• Technical Committee: CES - Roads
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 03-Mar-2022
• Due Date: 08-May-2022
• Completion Date: 14-Mar-2022
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Ref Project: EN 12697-15:2022 - Bituminous mixtures - Test methods - Part 15: Determination of the segregation sensitivity

Relations

• Replaces: SIST EN 12697-15:2004 - Bituminous mixtures - Test methods for hot mix asphalt - Part 15: Determination of the segregation sensitivity
• Effective Date: 01-Apr-2022

Overview

SIST EN 12697-15:2022 is a European standard developed by CEN that defines the test method for determining the segregation sensitivity of bituminous mixtures. This standard focuses on evaluating the mixing quality and the tendency of bituminous mixtures to segregate during handling and processing. It is primarily intended for hot bituminous mixtures and is applicable for mix-design processes and client information purposes.

Segregation in bituminous mixtures affects pavement homogeneity, which influences durability, effectiveness, and performance. By applying this test method, manufacturers and contractors can assess mixing efficiency and detect potential segregation issues early, enabling them to optimize production techniques and improve material consistency.

Key Topics

• Scope
  The standard is tailored for hot bituminous mixtures and provides a method to quantify segregation based on binder content and aggregate grading variations between different parts of a sample.

• Test Principle
  A conditioned sample of bituminous mixture is discharged from a conical hopper to form a stockpile. This stockpile is divided into finer and coarser parts by mechanical openings. The binder content and particle size distribution are analyzed for these parts.

• Measurements & Calculations

  • Binder Segregation Value (SV_binder): Difference in bitumen content between fine and coarse parts.
  • Aggregate Segregation Value (SV_aggregate): Difference in sieve analysis results for coarse aggregates.
  • Mixing Quality (MQ) Value: Difference in binder content in the mastic subparts of fine and coarse fractions.

• Apparatus and Sample Preparation
  A specialized mechanical segregator with a temperature-controlled hopper is used. Test portions are prepared from laboratory or plant-produced samples with specific mass requirements.

• Test Procedure
  The bituminous mixture is heated to a reference temperature before testing. The hopper releases the material forming a stockpile divided via deadfalls. Samples from different parts are collected and analyzed for their composition.

• Precision and Reporting
  The standard provides guidelines on test repeatability and reproducibility, ensuring reliable and comparable results. Detailed reporting requirements include sample identification, temperatures, mass measurements, binder contents, and segregation values.

Applications

• Quality Control in Asphalt Production
  Monitoring segregation sensitivity helps ensure uniform material distribution, preventing premature pavement failures due to segregation-induced weak zones.

• Mix Design Optimization
  The test supports mix design by providing data on how varying aggregate and binder proportions affect segregation tendencies, allowing optimization for durability and performance.

• Client and Regulatory Compliance
  Provides standardized data for clients and stakeholders to verify material homogeneity, improving confidence in delivered asphalt products.

• Research and Development
  Helps researchers assess new bituminous materials or modified mixtures for segregation behavior to innovate more stable and effective pavement solutions.

Related Standards

• EN 12697-1:2022 – Test methods for determining soluble binder content in bituminous mixtures
• EN 12697-2:2022 – Particle size distribution of bituminous mixtures
• EN 12697-27:2022 – Sampling methods for bituminous mixtures
• EN 12697-35:2022 – Laboratory mixing procedures for bituminous mixtures
• EN 933-1 – Tests for geometrical properties of aggregates, focused on particle size distribution by sieving

These complementary standards provide cohesion for comprehensive testing and quality assurance of road construction materials, ensuring consistent evaluation of bituminous mixtures.

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Keywords: SIST EN 12697-15:2022, segregation sensitivity, bituminous mixtures test method, mixing quality, binder segregation, aggregate segregation, hot bituminous mixtures, asphalt quality control, CEN standards, pavement material homogeneity, mix design testing, road construction materials.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2022
Nadomešča:
SIST EN 12697-15:2004
Bitumenske zmesi - Preskusne metode - 15. del: Ugotavljanje občutljivosti na
segregacijo
Bituminous mixtures - Test methods - Part 15: Determination of the segregation
sensitivity
Asphalt - Prüfverfahren - Teil 15: Bestimmung der Entmischungsneigung
Mélanges bitumineux - Méthodes d´essai - Partie 15: Détermination de la sensabilité à la
ségrégation
Ta slovenski standard je istoveten z: EN 12697-15:2022
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 12697-15
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2022
EUROPÄISCHE NORM
ICS 93.080.20 Supersedes EN 12697-15:2003
English Version
Bituminous mixtures - Test methods - Part 15:
Determination of the segregation sensitivity
Mélanges bitumineux - Méthodes d'essai - Partie 15 : Asphalt - Prüfverfahren - Teil 15: Bestimmung der
Détermination de la sensibilité à la ségrégation Entmischungsneigung
This European Standard was approved by CEN on 19 December 2021.

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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12697-15:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Principle . 6
5 Apparatus . 6
6 Preparation of test portion . 7
7 Procedure. 8
8 Analysis . 8
9 Calculation . 8
9.1 The binder segregation value . 8
9.2 The aggregate segregation value . 9
9.3 The mixing quality value . 9
10 Test report .10
11 Precision .10

European foreword
This document (EN 12697-15:2022) 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 2022, and conflicting national standards shall be withdrawn
at the latest by August 2022.
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 12697-15:2003.
The main changes compared to the previous edition are listed below:
— the title no longer refers to hot mix asphalt;
— (ge) editorial update according to current standard template;
— addition of new clause “Introduction” according to CEN/CENELEC Internal Regulations Part 3:2019;
— Clause 1, scope clarified according to CEN/CENELEC Internal Regulations Part 3:2019;
st nd
— Clause 4, previous clause “Significance and use” deleted. 1 and 2 paragraph transferred to Introduction.
3rd paragraph including NOTE transferred to Scope (modified);
— Clause 4, revised title to “Principal”. Following clauses renumbered;
— Clause 5, correction of Figure 1 (Clause 6 in previous version);
— Clause 9, completed with references to formulas. “(percentage)” replaced by: “to the nearest 0,1 %”;
— 9.2, correction to 1 % for the calculation of the aggregate segregation value;
— Clause10, revision of data to be reported.
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, Turkey and the United Kingdom.
Introduction
The homogeneity of the quality level of a bituminous pavement is among others determined by the
homogeneity of the composition of the bituminous mixtures applied. The homogeneity of a bituminous
mixture in the pavement is influenced by the mixing quality during production and by its segregation
sensitivity during handling. The latter is influenced by the mixture composition in terms of type and amount
of aggregate and binder. Some segregation is inherent to the nature of bituminous materials. Undue
segregation is caused by e.g. not appropriate mixing, improper loading of the hopper, lorry or finisher.
This test method provides useful information on the homogeneity quality of a bituminous mixture. The test
data provide information on the efficacy of the mixing procedure and on the sensitivity of the mixture for
segregation in its composition during the handling so that appropriate measures can be taken to minimize
such segregation where considered necessary.
1 Scope
This document specifies a test method for the determination of the mixing quality and the tendency of
segregation in composition of bituminous mixtures. This test method is considered suitable for mix-design
purposes and for client information.
NOTE This test method is based on hot bituminous mixtures. There is no experience for other types of bituminous
mixtures, e.g. asphalt concrete with bituminous emulsions.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requ
...