prEN 12697-35
(Main)Bituminous mixtures - Test methods - Part 35: Laboratory mixing
Bituminous mixtures - Test methods - Part 35: Laboratory mixing
This document describes the laboratory mixing of bituminous materials for the manufacture of specimens. This document specifies the reference compaction temperatures for mixing based on the grade of the binder for paving grade and hard paving grade bitumen.
Annex A describes the method for manufacture of samples of asphalt mixtures using foamed bitumen.
Annex B describes the method for manufacture of samples of asphalt mixtures using bitumen emulsion.
Once mixed, mastic asphalt samples are prepared in accordance with Annex C.
Asphalt - Prüfverfahren - Teil 35: Labormischen
Dieses Dokument beschreibt das Mischen von Asphalt im Labor zur Herstellung von Probekörpern. Dieses Dokument legt die Bezugstemperaturen für die Verdichtung fest, die beim Mischen auf der Grundlage der Bindemittelsorte für Straßenbaubitumen und hartes Straßenbaubitumen einzuhalten sind.
Anhang A beschreibt das Verfahren zur Herstellung von Proben aus Asphalt mit Schaumbitumen.
Anhang B beschreibt das Verfahren zur Herstellung von Proben aus Asphalt mit Bitumenemulsion.
Nach dem Mischen werden Gussasphaltprobekörper nach Anhang C hergestellt.
Mélanges bitumineux - Méthodes d'essai - Partie 35 : Mélange de laboratoire
Le présent document décrit le malaxage de matériaux bitumineux en laboratoire dans le cadre de la fabrication d’éprouvettes. Il définit les températures de compactage de référence pour le mélange en fonction du grade du liant pour les bitumes routiers usuels et les bitumes routiers de grade dur.
L’Annexe A décrit la méthode de fabrication d’échantillons de mélanges bitumineux à l’aide de mousse de bitume.
L’Annexe B décrit la méthode de fabrication d’échantillons de mélanges bitumineux à base d’émulsion de bitume.
Une fois malaxés, les échantillons d’asphalte coulé sont préparés conformément à l’Annexe C.
Bitumenske zmesi - Preskusne metode - 35. del: Laboratorijska zmes
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2023
Bitumenske zmesi - Preskusne metode - 35. del: Laboratorijska zmes
Bituminous mixtures - Test methods - Part 35: Laboratory mixing
Asphalt - Prüfverfahren - Teil 35: Labormischen
Mélanges bitumineux - Méthodes d'essais - Partie 35: Malaxage de laboratoire
Ta slovenski standard je istoveten z: prEN 12697-35
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.
DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2023
ICS 93.080.20 Will supersede EN 12697-35:2016
English Version
Bituminous mixtures - Test methods - Part 35: Laboratory
mixing
Mélanges bitumineux - Méthodes d'essais - Partie 35: Asphalt - Prüfverfahren - Teil 35: Labormischung
Malaxage de laboratoire
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 227.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12697-35:2023 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 5
2 Normative references . 5
3 Terms, definitions and symbols . 5
3.1 Terms and definitions . 5
3.2 Symbols . 6
4 Principle . 6
5 Apparatus . 6
6 Procedure . 7
6.1 Reference compaction temperature for mixtures, reference installation temperature
for mastic asphalt . 7
6.2 Preparation of aggregate and filler . 8
6.3 Preparation of reclaimed asphalt . 8
6.4 Preparation of binder . 9
6.5 Mixing . 9
7 Test report . 11
Annex A (normative) Asphalt using foamed bitumen . 12
Annex B (normative) Asphalt using bitumen emulsion . 15
Annex C (normative) Preparing mastic asphalt . 18
Bibliography . 19
European foreword
This document (prEN 12697-35:2023) has been prepared by Technical Committee CEN/TC 227 “Road
materials”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12697-35:2016.
EN 12697-35:2016:
The main changes compared to the previous edition are listed below:
— [ge] editorial update according to current standard template and CEN/CENELEC Internal Regulations
Part 3:2022;
— [2] deletion of normative references to standards in EN 13108-series;
— [5] NOTE modified;
— [5.2] deletion to reference to EN12697-38. Replacement of “accuracy” with “maximum permissible
error of 2°C;
— [5.3] deletion to reference to EN12697-38. Replacement of “accuracy” with “maximum permissible
error at least 0,1 g for masses up to 5 kg, and 1 g for masses over 5 kg;
— [5.4] replacement of “accuracy” with “maximum permissible error of 2°C;
— [5.5] replacement of “accuracy” with “maximum permissible error of 2°C;
— [6] amendment of title “mixing temperature” to read “Reference compaction temperature”;
— [6.1] references to product standards EN 12591, EN 13924-1, EN 14023, EN 13924-2 and EN 13108-
series placed in NOTES;
— [6.1] amendment of title of TABLE 1 to add “reference installation temperature”;
— [6.2.2] replacement of “accuracy” with “to the nearest”;
— [6.2.3] replacement of “accuracy of 1%” with “to the nearest 0,1 g”;
— [6.2.4] amendment of the sentence to take into account additives such as pigments and fibres;
— [6.3.1] replacement of “accuracy” with “to the nearest”;
— [6.3.7] the NOTE in 6.3.8 has been transformed into main text in 6.3.7;
— [6.5.2] reference to EN 13043 added in a Note;
— [6.5.6] addition of a Note for mixing times of mastic asphalt;
— [A.3.4.2] addition of the water content of the foam bitumen;
— [A.4.4.2] addition of the water content of the foam bitumen;
— [A.5.3.2] replacement of “accuracy” with “to the nearest 0,1g;
— [B.2.2.4] addition of the sentence to require the measurement of the water content of the reclaimed
asphalt;
— [B.2.4.4] deletion of waiting time after mixing;
— [B.3.4.4] amendment of waiting time after mixing (30 ± 5) s to read (300 ± 5) s;
— [C.2] amendment of maximum temperature 150°C to read 160°C;
— [Bibliography] addition of reference to EN13018-series, EN 12595, EN13924-1, EN13924-2,
EN14023, EN 13043, deletion of references to EN 12595.
A list of all parts in a series can be found on the CEN website: www.cencenelec.eu.
1 Scope
This document describes the laboratory mixing of bituminous materials for the manufacture of
specimens. This document specifies the reference compaction temperatures for mixing based on the
grade of the binder for paving grade and hard paving grade bitumen.
Annex A describes the method for manufacture of samples of asphalt mixtures using foamed bitumen.
Annex B describes the method for manufacture of samples of asphalt mixtures using bitumen emulsion.
Once mixed, mastic asphalt samples are prepared in accordance with Annex C.
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 58, Bitumen and bituminous binders - Sampling bituminous binders
EN 1097-5, Tests for mechanical and physical properties of aggregates - Part 5: Determination of the
water content by drying in a ventilated oven
EN 12697-42, Bituminous mixtures - Test methods - Part 42: Amount of foreign matter in reclaimed
asphalt
EN 13302, Bitumen and bituminous binders - Determination of dynamic viscosity of bituminous binder
using a rotating spindle apparatus
EN 13702, Bitumen and bituminous binders - Determination of dynamic viscosity of bitumen and
bituminous binders by the cone and plate method
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1.1
reference compaction temperature
target value at which compaction (or installation for mastic asphalt) of an asphalt mixture starts
Note 1 to entry: The term “reference compaction temperature” is used here for mastic asphalt despite mastic
asphalt not being compacted.
3.1.2
target laboratory mixing temperature
value at which component materials are mixed to form an asphalt mixture
3.1.3
maximum laboratory mixing temperature
value that an asphalt mixture shall not exceed during the mixing process
3.1.4
reclaimed asphalt temperature
target value to which a reclaimed asphalt shall be heated before mixing
3.2 Symbols
θ is the reference compaction temperature
RCT
θ is the target laboratory mixing temperature
TLMT
θ is the reclaimed asphalt temperature
RA
θ is the temperature to which the fresh aggregate shall be heated
FA
p is the proportion of reclaimed asphalt
4 Principle
The bituminous mixture is prepared at a target laboratory mixing temperature within a time that is
limited in order to reduce mechanical degradation of the aggregates and thermal degradation of the
binder.
NOTE The target laboratory mixing temperature for mixing is related to the grade of binder and to the
reference compaction temperatures used for its subsequent compaction.
5 Apparatus
5.1 Laboratory mixer capable of entirely coating all mineral substances in not more than 5 min.
The mixer shall be of the whisk or other type that is not so rigid that it can damage either the aggregate
particles or the bowl.
The mixer may be equipped with a thermostatically controlled heating system, a mechanical speed
control; and a mixing time programmer.
5.2 Ventilated oven, for heating aggregates and bitumen up to a temperature at least 20 °C above the
relevant reference compaction temperature and with a maximum permissible error of 2 °C.
5.3 Balance, capable of measuring the mass of the intended mixture with a maximum permissible
error of at least 0,1 g for masses up to 5 kg, and 1 g for masses over 5 kg.
5.4 Device, capable of measuring the relevant target laboratory mixing temperature with a maximum
permissible error of 2 °C.
5.5 Adjustable hot plate, capable of maintaining the required target laboratory mixing temperature
during the manual mixing with a maximum permissible error of 2 °C.
6 Procedure
6.1 Reference compaction temperature for mixtures, reference installation temperature
for mastic asphalt
The reference compaction temperature for mixture or reference installation temperature for mastic
asphalt shall be either:
— for mixtures with paving grade bitumen or hard paving grade bitumen, the reference compaction
temperatures given in Table 1, or
NOTE 1 Paving grade bitumen is covered by EN 12591 and hard bitumen is covered by EN 13924-1.
— for mixtures with modified binders or other additives or with polymer modified bitumen or
multigrade bitumen, a temperature at which the binder has a viscosity similar to the binders at the
temperature provided in Table 1 or the temperature at which the binder has a dynamic viscosity of
(0,28 ± 0,03) Pa·s measured according to EN 13702 or EN 13302, or the temperatures indicated by
suppliers, or
— for asphalts designed to be produced at lower temperatures, the temperature at which compaction
is intended for the asphalt during normal production.
NOTE 2 Polymer modified bitumen is covered by EN 14023 and multigrade bitumen is covered by EN 13924-2.
— for mixtures with reclaimed asphalt, the temperature shall be calculated using the overall
penetration, softening point or viscosity calculated from the penetrations, softening points or
viscosities and proportions of both the added binder and the binder recovered from the reclaimed
asphalt.
NOTE 3 Guidance for t
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