prEN 16659
(Main)Bitumen and bituminous binders - Multiple Stress Creep and Recovery Test (MSCRT)
Bitumen and bituminous binders - Multiple Stress Creep and Recovery Test (MSCRT)
This document specifies a test method for the determination of per cent recovery and non-recoverable creep compliance of bitumen and bituminous binders by means of Multiple Stress Creep and Recovery (MSCR) testing. The MSCR test is conducted using the Dynamic Shear Rheometer (DSR) in creep mode at a specified temperature.
The per cent recovery at multiple stress levels is intended to determine the presence of elastic response and stress dependence of bituminous binders. The non-recoverable creep compliance at multiple stress levels is intended as an indicator for the sensitivity to permanent deformation and stress dependence of bituminous binders.
This document is applicable to un-aged, aged, stabilised and recovered bituminous binders. The test procedure in accordance with this document is not applicable for bituminous binders with particles larger than 250 μm (e.g. filler material, granulated rubber).
WARNING - The use of this document can involve hazardous materials, operations and equipment. This document does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this document to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.
Bitumen und bitumenhaltige Bindemittel - MSCR-Prüfung (Multiple Stress Creep and Recovery Test)
Bitumes et liants bitumineux- Essai de fluage-recouvrance sous contraintes répétées (essai MSCR)
Bitumen in bitumenska veziva - Ponavljajoči obremenilni in razbremenilni preskus lezenja (MSCRT)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2024
Nadomešča:
SIST EN 16659:2016
Bitumen in bitumenska veziva - Ponavljajoči obremenilni in razbremenilni preskus
lezenja (MSCRT)
Bitumen and bituminous binders - Multiple Stress Creep and Recovery Test (MSCRT)
Bitumen und bitumenhaltige Bindemittel - MSCR-Prüfung (Multiple Stress Creep and
Recovery Test)
Bitumes et liants bitumineux- Essai de fluage-recouvrance sous contraintes répétées
(essai MSCR)
Ta slovenski standard je istoveten z: prEN 16659
ICS:
75.140 Voski, bitumni in drugi naftni Waxes, bituminous materials
proizvodi and other petroleum products
91.100.50 Veziva. Tesnilni materiali Binders. Sealing materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2024
ICS 75.140; 91.100.50 Will supersede EN 16659:2015
English Version
Bitumen and bituminous binders - Multiple Stress Creep
and Recovery Test (MSCRT)
Bitumes et liants bitumineux- Essai de fluage- Bitumen und bitumenhaltige Bindemittel - MSCR-
recouvrance sous contraintes répétées (essai MSCR) Prüfung (Multiple Stress Creep and Recovery Test)
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 336.
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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 16659:2024 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 Apparatus . 5
6 Preparation of rheometer . 6
6.1 Set up . 6
6.2 Zero gap setting . 6
7 Sample preparation . 6
8 Procedure. 7
8.1 Specimen placing into the rheometer . 7
8.2 Gap setting . 7
8.3 Testing . 7
9 Calculations . 9
10 Expression of results . 10
11 Precision . 11
11.1 General . 11
11.2 Repeatability, r . 12
11.3 Reproducibility, R . 12
12 Report . 12
European foreword
This document (prEN 16659:2024) has been prepared by Technical Committee CEN/TC 336 “Bitumens and
bituminous binders”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 16659:2015.
a) sub-section numbering removed and restriction of particle size added in the scope;
b) reference to EN 58 removed;
c) reworded “load” into “stress” in 3.1;
d) wording of shear strain and shear stress aligned;
e) definition of shear strain including explanatory Note added in 3.4;
f) shear strain expressed in per cent instead of absolute values; symbol of shear strain changed from ε to γ;
g) testing temperature range adjusted to [40 to 90] °C;
h) minimum range of rheometer control temperature adjusted to [40 to 90] °C in 5.1;
i) dimensions of silicone mould added in 5.2;
j) 6.4 “Zero gap setting” revised and aligned with EN 14770;
k) heating procedure in 7.1 simplified with reference to EN 12594;
l) 7.2 “Specimen manufacturing and storage conditions” revised and aligned with EN 14770; sentence
recommending to use a mixer for PMB removed in 7.2;
m) 8.1 “Specimen placing into the rheometer” and 8.2 “Gap setting” revised and aligned with EN 14770;
n) information on test temperatures added in the Note of 8.3.1;
o) torque values added in Note 2 of 8.3.2 and Note 2 of 8.3.4;
p) information on more stress levels added in the Note 2 of 8.3.3;
q) 8.3.4 added to allow subsequent testing at several test temperatures;
r) Figure 1 and Figure 2 revised for clarification;
s) Clause 10 revised and complemented with new precision data;
t) Clause 11 revised for comprehensiveness.
1 Scope
This document specifies a test method for the determination of per cent recovery and non-recoverable creep
compliance of bitumen and bituminous binders by means of Multiple Stress Creep and Recovery (MSCR)
testing. The MSCR test is conducted using the Dynamic Shear Rheometer (DSR) in creep mode at a specified
temperature.
The per cent recovery at multiple stress levels is intended to determine the presence of elastic response and
stress dependence of bituminous binders. The non-recoverable creep compliance at multiple stress levels is
intended as an indicator for the sensitivity to permanent deformation and stress dependence of bituminous
binders.
This document is applicable to un-aged, aged, stabilized and recovered bituminous binders. The test
procedure in accordance with this document is not applicable for bituminous binders with particles larger
than 250 μm (e.g. filler material, granulated rubber).
WARNING — The use of this document can involve hazardous materials, operations and equipment. This
document does not purport to address all of the safety problems associated with its use. It is the
responsibility of the user of this document to establish appropriate safety and health practices and to
determine the applicability of regulatory limitations prior to use.
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 12594, Bitumen and bituminous binders — Preparation of test samples
EN 14770, Bitumen and bituminous binders — Determination of complex shear modulus and phase angle —
Dynamic Shear Rheometer (DSR)
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:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
creep and recovery
standard rheological test protocol whereby a specimen is subjected to a constant stress for a fixed time
period, then allowed to recover, at zero stress, for a fixed time period
3.2
per cent recovery
recovered shear strain in a specimen during the recovery portion of a cycle, expressed in per cent
Note 1 to entry: The per cent recovery is designed by “%R”.
3.3
non-recoverable creep compliance
residual shear strain in a specimen after a creep and recovery cycle divided by the shear stress applied
Note 1 to entry: The non-recoverable creep compliance is designed by “Jnr”.
3.4
shear strain
deformation of the specimen at the outer edge of the plate-plate measuring geometry caused by tangential
displacement in relation to the gap width, expressed in per cent
Note 1 to entry: The shear strain is designed by “γ”.
Note 2 to entry: The test results will be relative due to the fixation of the shear position to 100 %. This means that
these results can only be compared using 25 mm plates.
4 Principle
This test method is used to determine the presence of elastic response in bitumen and bituminous binders
under shear creep and recovery at two shear stress levels at a specified temperature. The presence of this
elastic response is determined by measuring the per cent recovery and non-recoverable compliance of the
binder. Non-recoverable creep compliance has been shown to be an indicator of the resistance of bitumen
and bituminous binders to permanent deformation under repeated load.
The test shall be conducted at one or more fixed temperatures in the range of [40 to 90] °C. Sample
preparation and apparatus shall be in accordance with EN 14770, using the 25 mm parallel plate geometry
with a 1 mm gap setting.
The sample is loaded at constant shear stress for 1 s, then allowed to recover for 9 s. 10 creep and recovery
cycles are run at 0,100 kPa creep stress followed by 10 more cycles at 3,200 kPa creep stress (see Figure 1).
5 Apparatus
The usual laboratory apparatus and glassware, together with the following, shall be used:
5.1 Dynamic shear rheometer (DSR), with either an integral temperature control system or temperature
control attachments, capable of controlling the temperature over a minimum range of [40 to 90] °C with a
maximum permissible error of ±0,1 °C throughout the test period.
The rheometer shall be fitted with parallel plates, with a constant gap across the area of the plates. The
temperature control system shall encompass both plates, to avoid temperature gradients across the plates.
When the test specimen is immersed in a liquid other than water, ensure that the liquid does not affect the
properties of the material being analysed. The rheometer shall run in stress controlled mode and be able to
collect data samples every 0,1 s.
Where the bottom plate is nominally the same diameter as the top plate, a visual check should be made to
ensure the two plates are vertically aligned. If there is any doubt as to the alignment of the top and bottom
plates, then the manufacturer, or a qualified technician, should re-align the plate geometry.
5.2 Moulds or sheet materials, made of silicone or similar material, which does not adhere to the test
specimens during their preparation.
A mould with a cavity of approximately 18 mm in diameter and 2 mm-deep proved to be appropriate.
The use of greases or other anti-stick products is not allowed because they can affect the adherence of the
sample to the rheometer plates.
5.3 Oven, ventilated laboratory model, capable of being controlled at temperatures between 50 °C and
200 °C with a maximum permissible error of ±5 °C.
6 Preparation of rheometer
6.1 Set up
Set up
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.