prEN 12697-31 rev

Bituminous mixtures - Test methods - Part 31: Specimen preparation by gyratory compactor

This European Standard specifies the method for compaction of cylindrical specimens of bituminous mixtures using a gyratory compactor. Such compaction is achieved by combining a rotary shearing action and a vertical resultant force applied by a mechanical head.
The method is used for:
a) determination of the air voids content of a mixture for a given number of gyrations or derivation of a curve density (or void content) versus number of gyrations;
b) preparation of specimens of given height and/or at a predetermined density, for subsequent testing of their mechanical properties.

Asphalt - Prüfverfahren - Teil 31: Herstellung von Probekörpern mit dem Gyrator-Verdichter

Mélanges bitumineux - Méthodes d’essai - Partie 31: Confection d’éprouvettes à la presse à compactage giratoire

Bitumenske zmesi - Preskusne metode - 31. del: Priprava preskušancev z vrtljivim zgoščevalnikom

General Information

• Status: Not Published
• Publication Date: 10-Jul-2016
• Withdrawal Date: 10-Jan-2017
• 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: 4098 - Decision to abandon - Enquiry
• Start Date: 11-Dec-2015
• Completion Date: 11-Dec-2015
• Ref Project: oSIST prEN 12697-31:2014 - Bituminous mixtures - Test methods - Part 31: Specimen preparation by gyratory compactor

Relations

• Revises: EN 12697-31:2007 - Bituminous mixtures - Test methods for hot mix asphalt - Part 31: Specimen preparation by gyratory compactor
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2014
%LWXPHQVNH]PHVL3UHVNXVQHPHWRGHGHO3ULSUDYDSUHVNXãDQFHY]YUWOMLYLP
]JRãþHYDOQLNRP
Bituminous mixtures - Test methods - Part 31: Specimen preparation by gyratory
compactor
Asphalt - Prüfverfahren - Teil 31: Herstellung von Probekörpern mit dem Gyrator-
Verdichter
Mélanges bitumineux - Méthodes d’essai - Partie 31: Confection d’éprouvettes à la
presse à compactage giratoire
Ta slovenski standard je istoveten z: prEN 12697-31 rev
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.

EUROPEAN STANDARD
DRAFT
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2014
ICS 93.080.20 Will supersede EN 12697-31:2007
English Version
Bituminous mixtures - Test methods - Part 31: Specimen
preparation by gyratory compactor
Mélanges bitumineux - Méthodes d'essai - Partie 31: Asphalt - Prüfverfahren - Teil 31: Herstellung von
Confection d'éprouvettes à la presse à compactage Probekörpern mit dem Gyrator-Verdichter
giratoire
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey 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: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12697-31 rev:2014 E
worldwide for CEN national Members.

prEN 12697-31:2014 (E)
Contents Page
Foreword .4
1 Scope .8
2 Normative references .8
3 Terms, definitions and symbols .9
3.1 Terms and definitions .9
3.2 Symbols .9
4 Principle . 11
5 Apparatus . 12
5.1 Test device . 12
5.2 Metallic moulds . 12
5.3 Round metallic inserts . 13
5.4 Device for measuring the distance between inserts . 13
5.5 Device for counting the number of rotations to within one revolution . 13
6 Preparation of specimens . 13
6.1 Mass of mixture to be introduced in the mould . 13
6.1.1 Preparation of specimens for further mechanical testing . 13
6.1.2 Preparation of specimens for void content requirement. 13
6.2 Preparation of mixtures . 14
7 Test procedure . 15
7.1 Preliminary setting. 15
7.1.1 Pre-load . 15
7.1.2 Force F . 15
7.1.3 Setting of the angle of inclination . 15
7.1.4 Speed of rotation . 16
7.1.5 Temperature . 16
7.2 Compaction . 16
7.2.1 Start of compaction . 16
7.2.2 Specimens for void content requirement . 16
7.2.3 Specimens for further testing . 17
8 Test report . 17
9 Precision . 18
Annex A (normative) Procedure for setting the angle and force for types of gyratory compactor
using central reference material . 19
A.1 Scope . 19
A.2 Principle . 19
A.3 Gyratory-type testing procedure . 19
A.3.1 Central reference materials for gyratory-type testing. 19
A.3.2 Force . 20
A.3.3 Gyratory-type angle test . 21
A.4 Procedure to test the conformity of a gyratory compactor to a type . 21
A.5 Procedure for periodical check . 21
A.6 Summary of the gyratory calibration chain . 22
Annex B (normative) Procedure to evaluate the gyratory compactor internal angle of gyration

using a self-contained measurement unit . 23
B.1 Scope . 23
B.2 Principle . 23
prEN 12697-31:2014 (E)
B.3 Equipment . 23
B.3.1 Measurement instrument . 23
B.3.2 Static angle block . 23
B.4 Procedure . 24
B.4.1 General . 24
B.4.2 Determination of the bottom angle . 24
B.4.3 Determination of the top angle . 25
B.4.4 Repetitions of bottom and top angle determination . 26
B.5 Calculation . 26
B.6 Compliance . 27
B.7 Report . 28
B.8 Precision data . 28
B.9 Periodical check procedure . 28
Annex C (normative) Procedure to evaluate the gyratory compactor (GC) internal angle of
gyration and related parameters using simulated loading . 29
C.1 Scope . 29
C.2 Principle. 29
C.3 Procedure . 29
C.4 Calculation of results . 29
C.5 Compliance . 30
C.6 Report . 31
C.7 Precision and bias . 31
Bibliography . 33

prEN 12697-31:2014 (E)
Foreword
This document (prEN 12697-31:2014) has been prepared by Technical Committee CEN/TC 227 “Road
materials”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12697-31:2007.
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;
 advice in Scope on use of alternative calibration Annexes revised and changed from Note to normative;
 definition of internal angle deleted;
 symbols Mw, ITA and IBA added and w made the symbol for water content throughout;
425 425
 system to collect excess moisture added to requirements for test device;
 ventilated oven, balance and thermometer added to list of equipment;
 existing preparation of specimens made for dry mixtures and separate method for wet mixtures added;
 preparation of mixtures revised;
 the magnitude of force F redefined;
 NOTE to setting angle of inclination deleted and extra line added;
 start of compaction revised;
 number of gyrations at which measurements made clarified;
 water content added as optional in test reports;
 proportio
...