EN 12697-32:2019

SLOVENSKI STANDARD
01-maj-2019
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SIST EN 12697-32:2004+A1:2007
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Bituminous mixtures - Test methods - Part 32: Specimen preparation by vibratory
compactor
Asphalt - Prüfverfahren - Teil 32: Herstellung von Probekörpern mit einem
Vibrationsverdichter
Matériaux enrobés - Méthodes d'essai - Partie 32 : Compactage en laboratoire de
mélanges bitumineux par compacteur vibratoire
Ta slovenski standard je istoveten z: EN 12697-32:2019
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 12697-32
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2019
EUROPÄISCHE NORM
ICS 93.080.20 Supersedes EN 12697-32:2003+A1:2007
English Version
Bituminous mixtures - Test methods - Part 32: Specimen
preparation by vibratory compactor
Matériaux enrobés - Méthodes d'essai - Partie 32 : Asphalt - Prüfverfahren - Teil 32: Herstellung von
Compactage en laboratoire de mélanges bitumineux Probekörpern mit einem Vibrationsverdichter
par compacteur vibratoire
This European Standard was approved by CEN on 19 November 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
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12697-32:2019 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 Materials . 5
6 Apparatus . 5
7 Preparation of test specimens . 6
7.1 Core specimens . 6
7.2 Plant-mixed materials . 7
7.3 Laboratory-mixed materials . 7
8 Calculation and expression of results . 7
9 Test report . 7
10 Precision . 8
Annex A (normative) Test method for determining the suitability of a vibrating hammer for
laboratory compaction . 10
A.1 Principle . 10
A.2 Apparatus . 10
A.3 Materials . 10
A.4 Preparation of sample . 10
A.5 Procedure. 10
A.6 Calculation and expression of results . 11
A.7 Calibration certificate . 12
European foreword
This document (EN 12697-32:2019) 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 September 2019, and conflicting national standards
shall be withdrawn at the latest by September 2019.
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 12697-32:2003+A1:2007.
The following is a list of significant technical changes since the previous edition:
— The series title no longer makes the method exclusively for hot mix asphalt;
— Title shortened to be in line with other compaction methods;
— [7.1.11] De-moulding of sample clarified;
— [7.3.1] Reference to EN 12697-30:2004+A1:2007 replaced by EN 12697-35;
— [A.2.8] Reference to apparatus for water content: EN 1097-5 replaces EN 12697-14;
— [A.6] Deletion of brackets in formulae: [A.1] and [A.2].
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, 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 document specifies a method for the preparation of bituminous test specimens using a vibratory
compaction technique.
This document is applicable to loose mixtures and cores and is used to establish a refusal density for a
bituminous mixture, or to determine the ease of compaction as described in EN 12697-10.
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 1097-5, Tests for mechanical and physical properties of aggregates — Part 5: Determination of the
water content by drying in a ventilated oven
EN 12697-6, Bituminous mixtures — Test methods for hot mix asphalt — 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 12697-10, Bituminous mixtures — Test methods — Part 10: Compactability
EN 12697-27, Bituminous mixtures — Test methods — Part 27: Sampling
EN 12697-35, Bituminous mixtures — Test methods — Part 35: Laboratory mixing
3 Terms and definitions
For the purposes of this document, the following terms and definitions 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 http://www.iso.org/obp
3.1
bulk density
mass in air per unit volume of the compacted specimen at ambient temperature
3.2
refusal density
mass per unit volume, including voids, of the specimen compacted to refusal
3.3
refusal air voids content
air voids content of specimen compacted to refusal in accordance with the test method
3.4
percentage refusal density
ratio of the initial bulk density of the compacted specimen to its refusal density, expressed as a
percentage
4 Principle
After the mixing, preparation and conditioning of a bituminous material in the laboratory, the heating of
a core extracted from the road surface to compaction temperature, or the conditioning of plant-mixed
material, the material or core is placed in a standard mould with attached base plate and collar and
compacted by a vibratory hammer.
NOTE For loose material prepared or compacted in the laboratory, or plant-mixed material compacted in the
laboratory, the refusal density is an indication of the potential maximum density which may be achieved under
field conditions.
5 Materials
5.1 Sealing compound.
5.2 Paper discs, to prevent the ends of the specimen from sticking to the base plate or the tamping
foot.
5.3 Silicone grease, for use as a release agent.
5.4 Inert void filling material.
6 Apparatus
6.1 Drying oven, to maintain a temperature of between 25 °C and 45 °C.
6.2 Balance.
6.3 Water bath.
6.4 Split core mould and base plate (see Figure 1).
6.5 One spare base plate.
NOTE Only one spare base plate is needed for a complete set of moulds.
6.6 Heating oven, with fan-assisted circulation.
6.7 Electric vibrating hammer, conforming to Annex A and suitable for laboratory compaction. The
hammer shall have a power consumption of 750 W to 1 000 W and shall operate at a frequency of 20 Hz
to 50 Hz.
6.8 50 mm or 75 mm wide point stripping knife and a pallet knife.
6.9 (102 ± 2) mm diameter tamping foot and a (146 ± 2) mm diameter tamping foot, for use with the
electric vibrating hammer (see 6.7).
6.10 300 mm steel rule.
6.11 Pair of external callipers.
6.12 Stopwatch or clock.
6.13 Thermometer.
6.14 Saw, suitable for slicing a core to suitable size.
6.15 Paint brush.
7 Preparation of test specimens
7.1 Core specimens
7.1.1 After determination of the bulk density of the core in accordance with EN 12697-6 (initial bulk
density), if required, coat the split mould and base plate with a thin film of silicone grease and place a
paper disc on the base plate.
NOTE The initial bulk density of the core may be determined, when it is required for comparison to the-
refusal density as reference for it.
7.1.2 After removing any sealing compound (wax or tape) present, insert the core, with the flatter of
its two ends uppermost, into the mould. Tighten the mould and clamp the mould to the base plate.
7.1.3 Place the assembly, without the shank and tamping foot but including the additional base plate,
in a preheated oven maintained at the compaction temperature defined in EN 12697-35 for the grade of
binder in use. Retain in the oven until the centre of the core has attained the compaction temperature
defined in EN 12697-35.
NOTE It may be found convenient to measure the temperature of a dummy specimen placed in the oven at
the same time as the specimens to be compacted. The dummy specimen may have a thermocouple probe inserted
into its centre.
7.1.4 Condition the operating mechanism of the vibrating hammer by running it for at least 2 min on a
dummy specimen before beginning 7.1.6 and 7.1.7.
7.1.5 Remove the assembly from the oven and place it on a level rigid floor. Ensure the mould is
tightened until the split is closed. Place a paper disc on the exposed surface of the core.
7.1.6 Immediately compact the core with the vibrating hammer, using the 102 mm diameter tamping
foot, previously warmed to above 60 °C and coated with a thin layer of silicone grease. Hold the
hammer firmly with the shaft vertical and move the tamping foot from one position to another around
the mould in accordance with 7.1.7. Compact for 2 s to 10 s at each position. Move the tamping foot
from one position to the next before material bulges above the edge of the tamping foot.
7.1.7 Position the tamping foot in contact with the side of the mould and compact the material in the
following points of the compass sequence: N, S, W, E, NW, SE, SW, NE. Repeat the sequence until total
compaction time period a
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