EN 12697-28:2020

Bituminous mixtures - Test methods - Part 28: Preparation of samples for determining binder content, water content and grading

This document describes test methods for preparing test portions for the determination of the binder, water content and grading of samples of bituminous mixtures, when the sample submitted to the laboratory has a mass greater than or equal to four times the test portion.

Asphalt - Prüfverfahren - Teil 28: Vorbereitung von Proben zur Bestimmung des Bindemittelgehaltes, des Wassergehaltes und zur Korngrößenbestimmung

Dieses Dokument beschreibt Verfahren zur Vorbereitung von Messproben für die Bestimmung des Bindemittelgehaltes, des Wassergehaltes und der Korngrößenverteilung von Asphalt, wenn die Masse der dem Labor übergebenen Asphaltprobe mindestens dem 4 Fachen einer Messprobe entspricht.

Mélanges bitumineux - Méthodes d'essai - Partie 28 : Préparation des échantillons pour la détermination de la teneur en liant, de la teneur en eau et de la granularité

Ce document décrit des méthodes d'essai permettant de préparer des prises d'essai pour la détermination de la teneur en liant, de la teneur en eau et de la granularité des échantillons de matériaux bitumineux, lorsque les échantillons analysés au laboratoire ont une masse supérieure ou égale à quatre fois la prise d'essai.

Bitumenske zmesi - Preskusne metode - 28. del: Priprava vzorcev za ugotavljanje deleža veziva, deleža vode in zrnavosti

General Information

• Status: Published
• Publication Date: 25-Feb-2020
• Withdrawal Date: 30-Aug-2020
• 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: 9060 - Closure of 2 Year Review Enquiry - Review Enquiry
• Start Date: 02-Sep-2025
• Completion Date: 02-Sep-2025
• 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: SIST EN 12697-28:2020 - Bituminous mixtures - Test methods - Part 28: Preparation of samples for determining binder content, water content and grading

Relations

• Replaces: EN 12697-28:2000 - Bituminous mixtures - Test methods for hot mix asphalt - Part 28: Preparation of samples for determining binder content, water content and grading
• Effective Date: 08-Jun-2022

Overview

EN 12697-28:2020 - Bituminous mixtures: Test methods - Part 28 defines standard procedures for preparing laboratory samples used to determine binder content, water content and grading of bituminous mixtures. Published by CEN, this part applies when the sample submitted to the laboratory has a mass greater than or equal to four times the required test portion. The 2020 edition updates the 2000/2002 versions and expands scope beyond only hot mix asphalt.

Key topics and technical requirements

• Scope and definitions
  • Defines terms such as representative sample, laboratory sample, test portion and test specimen.
  • Applies when the laboratory sample mass ≥ 4× test portion.
• Apparatus
  • Typical equipment: balance, ruler, circular stone saw, oven (conventional or microwave), stopwatch, sample splitter (EN 932-1), shovel, containers.
• Pre-treatment
  • Inspect and record sample condition on receipt; store slabs and cores to minimize deformation.
  • Record and manage binder drainage: collect drained binder and add proportionate fraction to test portion.
  • Note and record uncoated or fractured aggregate, coated chippings, tack coat, surface dressing and extraneous material.
• Heat treatment
  • Reheat only as needed to facilitate mixing/separation.
  • Oven temperature limits depend on binder penetration class to reduce volatile loss (examples in the standard):

    • 330 pen: max 105 °C

    • 60–330 pen: max 120 °C
    • 25–60 pen: max 135 °C
    • < 25 pen: max 150 °C
  • Maximum oven residence: 4 hours.
• Sample reduction
  • Reduce bulk sample to test portions by sample splitter or quartering (coning and quartering method).
  • Tabled masses specify minimum and maximum test portion masses by maximum aggregate size (e.g., ≤ 4 mm: 450–600 g; > 31.5 mm: 3 000–5 000 g).
  • Detailed procedures for multi-course slabs, separation of courses, and handling of free water are provided.
• Traceability
  • Record all adjustments (e.g., removed chippings, added binder fraction) and any limitations affecting representativeness.

Applications and users

• Organizations performing asphalt testing, pavement quality control and laboratory analysis:
  • Road materials laboratories, highway authorities, contractors, independent testing labs and pavement engineers.
• Typical uses:
  • Preparing representative test portions for binder content analysis (extraction), moisture determination, and aggregate grading to support acceptance testing, forensic investigation and research.

Related standards

• EN 12697 series (other parts cover extraction, grading and performance tests)
• EN 12697-36 (determination of pavement thickness)
• EN 932-1 (aggregate sampling and sample splitter guidance)

Keywords: EN 12697-28:2020, bituminous mixtures, sample preparation, binder content, water content, grading, asphalt testing, CEN.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2020
Nadomešča:
SIST EN 12697-28:2002
Bitumenske zmesi - Preskusne metode - 28. del: Priprava vzorcev za ugotavljanje
deleža veziva, deleža vode in zrnavosti
Bituminous mixtures - Test methods - Part 28: Preparation of samples for determining
binder content, water content and grading
Asphalt - Prüfverfahren - Teil 28: Vorbereitung von Proben zur Bestimmung des
Bindemittelgehaltes, des Wassergehaltes und zur Korngrößenbestimmung
Mélanges bitumineux - Méthodes d'essai - Partie 28: Préparation des échantillons pour
la détermination de la teneur en liant, de la teneur en eau et de la granularité
Ta slovenski standard je istoveten z: EN 12697-28:2020
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 12697-28
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2020
EUROPÄISCHE NORM
ICS 93.080.20 Supersedes EN 12697-28:2000
English Version
Bituminous mixtures - Test methods - Part 28: Preparation
of samples for determining binder content, water content
and grading
Mélanges bitumineux - Méthodes d'essai - Partie 28 : Asphalt - Prüfverfahren - Teil 28: Vorbereitung von
Préparation des échantillons pour la détermination de Proben zur Bestimmung des Bindemittelgehaltes, des
la teneur en liant, de la teneur en eau et de la Wassergehaltes und zur Korngrößenbestimmung
granularité
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 12697-28:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Apparatus . 5
5 Preparation of laboratory samples of bituminous mixtures . 5

European foreword
This document (EN 12697-28:2020) 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 12697-28:2000.
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] NOTEs modified or adjusted to normal text where appropriate according to ISO/IEC
Directives – Part 2:2016, 24.5;
— [Clause 2] corrected reference to EN 12697-36. Reference to EN 58 deleted;
— [Clause 3] reference to EN 58 deleted;
— [5.3.1] dated reference to EN 12697-36 deleted;
— [5.5] Figures 2 and 3 quality improved;
— [5.5.1] Table 2 clarified. Minimum test portion amended.
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 describes test methods for preparing test portions for the determination of the
binder, water content and grading of samples of bituminous mixtures, when the sample
submitted to the laboratory has a mass greater than or equal to four times the test portion.
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 932-1, Tests for general properties of aggregates — Part 1: Methods for sampling
EN 12697-36, Bituminous mixtures — Test methods for hot mix asphalt — Part 36: Determination
of the thickness of a bituminous pavement
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 https://www.iso.org/obp/ui
3.1
representative sample
bulk sample consisting of a specified number of increments purposely taken to represent a
specific quantity or area of material
Note 1 to entry: A representative sample is assumed to have the same composition as the material
sampled, within the limits of precision associated with the method of sampling.
3.2
laboratory sample
sample despatched to the laboratory
Note 1 to entry: It can be the whole or part of the bulk or representative sample and sufficient quantity
for all tests required.
3.3
test portion
part of the laboratory sample to be used for a specific test procedure to produce a single test
result
3.4
test specimen
part of the test portion on which a single test is carried out
Note 1 to entry: A number of tests might be necessary to produce a test result.
3.5
test result
result obtained by applying the test procedure to a test portion
Note 1 to entry: When the test procedure is required to be carried out on more than one test specimen,
the test result will be calculated as the mean result of a number of determinations.
4 Apparatus
4.1 Balance.
4.2 Ruler.
4.3 Circular saw, capable of cutting stone.
4.4 Oven, conventional or microwave.
4.5 Stopwatch.
4.6 Metal tray (optional).
4.7 Sample splitter in accordance with EN 932-1 (such as that shown in Figure 1), optional.
4.8 Shovel.
4.9 Container.
5 Preparation of laboratory samples of bituminous mixtures
5.1 Preliminary inspection and storage
5.1.1 On receipt of the laboratory sample inspect it and record its condition.
5.1.2 If a slab or a core cut from compacted material is to be stored prior to examination or
separation of courses, take care so as to minimize deformation or deterioration of the material.
Store slabs on a clean, hard, flat surface, preferably out of direct sunlight, with the final rolled
surface at the bottom.
NOTE Cores of well compacted materials made with high viscosity binders will normally keep well
standing vertically upside down on a clean bench in a cool room, but cores cut from less stable materials
might require refrigeration especially for porous asphalt cores.
5.2 Pre-
...