SIST EN 13286-47:2022

Unbound and hydraulically bound mixtures - Part 47: Test method for the determination of California bearing ratio, immediate bearing index and linear swelling

This document specifies the test methods for the laboratory determination of the California bearing ratio and immediate bearing index.
The tests are appropriate to that part of the mixture up to a maximum particle size of 22,4 mm.
When immersion in water is specified as part of the curing of the specimen, this document also includes the determination of vertical swelling of the specimen before the determination of the California bearing ratio.

Ungebundene und hydraulisch gebundene Gemische - Teil 47: Prüfverfahren zur Bestimmung des CBR-Wertes (California bearing ratio), des direkten Tragindex (IBI) und des linearen Schwellwertes

Dieses Dokument legt Laborprüfverfahren zur Bestimmung des CBR-Wertes (CBR, en: California bearing ratio) und des direkten Tragindex (IBI, en: immediate bearing index) fest.
Der Versuch wird an Laborproben durchgeführt, deren maximale Korngröße 22,4 mm beträgt.
Für den Fall, dass Probekörper unter Wasser gelagert werden sollen, enthält dieses Dokument auch die vor der Bestimmung des CBR-Wertes vorzunehmende Bestimmung der vertikalen Quellung der Probekörper.

Mélanges traités et mélanges non traités aux liants hydrauliques - Partie 47: Méthode d'essai pour la détermination de l'indice portant Californien (CBR), de l'indice de portance immédiate (IPI) et du gonflement linéaire

Le présent document spécifie les méthodes d'essai pour la détermination en laboratoire de l’indice portant Californien (CBR) et de l’indice de portance immédiate (IPI).
Les essais conviennent aux parties de mélanges dont la granulométrie maximale est de 22,4 mm.
Lorsqu’une conservation de l’éprouvette en immersion est requise, le présent document comprend également la détermination du gonflement vertical avant la détermination de l’indice portant Californien.

Nevezane in hidravlično vezane zmesi - 47. del: Preskusna metoda za ugotavljanje kalifornijskega indeksa nosilnosti (CBR), neposrednega indeksa nosilnosti (IBI) in linearnega nabrekanja

Ta dokument določa preskusne metode za ugotavljanje kalifornijskega indeksa nosilnosti in neposrednega indeksa nosilnosti.
Preskusi so ustrezni za zmes, katere delci ne presegajo velikosti 22,4 mm.
Če je potopitev v vodo določena kot del strjevanja primerka, dokument vključuje tudi ugotavljanje vertikalnega nabrekanja primerka pred ugotavljanjem kalifornijskega indeksa nosilnosti.

General Information

• Status: Published
• Public Enquiry End Date: 19-Jan-2021
• Publication Date: 02-Dec-2021
• ICS: 93.080.20 - Road construction materials
• Technical Committee: CES - Roads
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 18-Nov-2021
• Due Date: 23-Jan-2022
• Completion Date: 03-Dec-2021
• Ref Project: EN 13286-47:2021 - Unbound and hydraulically bound mixtures - Part 47: Test method for the determination of California bearing ratio, immediate bearing index and linear swelling

Relations

• Replaces: SIST EN 13286-47:2012 - Unbound and hydraulically bound mixtures - Part 47: Test method for the determination of California bearing ratio, immediate bearing index and linear swelling
• Effective Date: 01-Jan-2022
• Replaces: SIST EN 13286-47:2012 - Unbound and hydraulically bound mixtures - Part 47: Test method for the determination of California bearing ratio, immediate bearing index and linear swelling
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 13286-47:2022
01-januar-2022
Nadomešča:
SIST EN 13286-47:2012
Nevezane in hidravlično vezane zmesi - 47. del: Preskusna metoda za ugotavljanje
kalifornijskega indeksa nosilnosti (CBR), neposrednega indeksa nosilnosti (IBI) in
linearnega nabrekanja
Unbound and hydraulically bound mixtures - Part 47: Test method for the determination
of California bearing ratio, immediate bearing index and linear swelling
Ungebundene und hydraulisch gebundene Gemische - Teil 47: Prüfverfahren zur
Bestimmung des CBR-Wertes (California bearing ratio), des direkten Tragindex (IBI) und
des linearen Schwellwertes
Mélanges traités et mélanges non traités aux liants hydrauliques - Partie 47: Méthode
d'essai pour la détermination de l'indice portant Californien (CBR), de l'indice de
portance immédiate (IPI) et du gonflement linéaire
Ta slovenski standard je istoveten z: EN 13286-47:2021
ICS:
93.080.20 Materiali za gradnjo cest Road construction materials
SIST EN 13286-47:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 13286-47:2022

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SIST EN 13286-47:2022


EN 13286-47
EUROPEAN STANDARD

NORME EUROPÉENNE

November 2021
EUROPÄISCHE NORM
ICS 93.080.20 Supersedes EN 13286-47:2012
English Version

Unbound and hydraulically bound mixtures - Part 47: Test
method for the determination of California bearing ratio,
immediate bearing index and linear swelling
Mélanges traités et mélanges non traités aux liants Ungebundene und hydraulisch gebundene Gemische -
hydrauliques - Partie 47: Méthode d'essai pour la Teil 47: Prüfverfahren zur Bestimmung des CBR-
détermination de l'indice portant Californien (CBR), de Wertes (California bearing ratio), des direkten
l'indice de portance immédiate (IPI) et du gonflement Tragindex (IBI) und des linearen Schwellwertes
linéaire
This European Standard was approved by CEN on 5 July 2021.

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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13286-47:2021 E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------
SIST EN 13286-47:2022
EN 13286-47:2021 (E)
Contents Page

European foreword . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Principle . 6
5 Apparatus . 6
5.1 Apparatus for specimen manufacture . 6
5.2 Additional apparatus for soaking procedure and measurement of swelling . 6
5.3 Additional apparatus for determination of the California bearing ratio and
immediate bearing index . 6
6 Test sample for the California bearing ratio and immediate bearing index tests . 7
7 Specimen manufacture for the California bearing ratio and immediate bearing index
tests . 7
8 Curing for California bearing ratio test. 7
8.1 General. 7
8.2 Curing by prevention of evaporation . 8
8.3 Curing that permits full soaking . 8
8.4 Curing consisting of ‘prevention of evaporation’ followed by soaking . 9
9 Procedure for California bearing ratio and immediate bearing index determination . 9
10 Calculation and expression of results . 10
11 Test report . 11
Annex A (normative) Different Types of Force-Penetration Curves . 12
A.1 Convex Upward Force-Penetration Curve . 12
A.2 Force-Penetration Curve with Inflexion Point S at X < 7,5 mm . 13
A.3 Concave Upward Force-Penetration Curve with Inflexion Point S at X > 7,5 mm . 14


2

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SIST EN 13286-47:2022
EN 13286-47:2021 (E)
European foreword
This document (EN 13286-47:2021) 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 May 2022, and conflicting national standards shall be
withdrawn at the latest by May 2022.
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 13286-47:2012.
In comparison with the previous edition, the following technical modifications have been made:
— editorial changes;
— a revised Clause 10 that provides more information for the possible force-penetration curves and
where necessary their correction;
— a revised Annex A reflecting the revised Clause 10. The Annex A is normative.
This document is one of a series of standards as listed below:
— EN 13286-1, Unbound and hydraulically bound mixtures — Part 1: Test methods for laboratory
reference density and water content — Introduction, general requirements and sampling
— EN 13286-2, Unbound and hydraulically bound mixtures — Part 2: Test methods for laboratory
reference density and water content — Proctor compaction
— EN 13286-3, Unbound and hydraulically bound mixtures — Part 3: Test methods for laboratory
reference density and water content — Vibrocompression with controlled parameters
— EN 13286-4, Unbound and hydraulically bound mixtures — Part 4: Test methods for laboratory
reference density and water content — Vibrating hammer
— EN 13286-5, Unbound and hydraulically bound mixtures — Part 5: Test methods for laboratory
reference density and water content — Vibrating table
— EN 13286-7, Unbound and hydraulically bound mixtures — Part 7: Cyclic load triaxial test for
unbound mixtures
— EN 13286-40, Unbound and hydraulically bound mixtures — Part 40: Test method for the
determination of the direct tensile strength of hydraulically bound mixtures
— EN 13286-41, Unbound and hydraulically bound mixtures — Part 41: Test method for the
determination of the compressive strength of hydraulically bound mixtures
— EN 13286-42, Unbound and hydraulically bound mixtures — Part 42: Test method for the
determination of the indirect tensile strength of hydraulically bound mixtures
3

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SIST EN 13286-47:2022
EN 13286-47:2021 (E)
— EN 13286-43, Unbound and hydraulically bound mixtures — Part 43: Test method for the
determination of the modulus of elasticity of hydraulically bound mixtures
— EN 13286-44, Unbound and hydraulically bound mixtures — Part 44: Test method for the
determination of the alpha coefficient of vitrified blast furnace slag
— EN 13286-45, Unbound and hydraulically bound mixtures — Part 45: Test method for the
determination of the workability period of hydraulically bound mixtures
— EN 13286-46, Unbound and hydraulically bound mixtures — Part 46: Test method for the
determination of the moisture condition value
— EN 13286-47, Unbound and hydraulically bound mixtures — Part 47: Test method for the
determination of California bearing ratio, immediate bearing index and linear swelling
— EN 13286-48, Unbound and hydraulically bound mixtures — Part 48: Test method for the
determination of degree of pulverisation
— EN 13286-49, Unbound and hydraulically bound mixtures — Part 49: Accelerated swelling test for soil
treated by lime and/or hydraulic binder
— EN 13286-50, Unbound and hydraulically bound mixtures — Part 50: Method for the manufacture of
test specimens of hydraulically bound mixtures using Proctor equipment or vibrating table
compaction
— EN 13286-51, Unbound and hydraulically bound mixtures — Part 51: Method for the manufacture of
test specimens of hydraulically bound mixtures using vibrating hammer compaction
— EN 13286-52, Unbound and hydraulically bound mixtures — Part 52: Method for the manufacture of
test specimens of hydraulically bound mixtures using vibro compression
— EN 13286-53, Unbound and hydraulically bound mixtures — Part 53: Methods for the manufacture of
test specimens of hydraulically bound mixtures using axial compression
— CEN/TS 13286-54, Unbound and hydraulically bound mixtures — Part 54: Test method for the
determination of frost susceptibility — Resistance to freezing and thawing of hydraulically bound
mixtures
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies 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.
4

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SIST EN 13286-47:2022
EN 13286-47:2021 (E)
1 Scope
This document specifies the test methods for the laboratory determination of the California bearing
ratio and immediate bearing index.
The tests are appropriate to that part of the mixture up to a maximum particle size of 22,4 mm.
When immersion in water is specified as part of the curing of the specimen, this document also includes
the determination of vertical swelling of the specimen before the determination of the California
bearing ratio.
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 13286-2, Unbound and hydraulically bound mixtures - Part 2: Test methods for laboratory reference
density and water content - Proctor compaction
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
3.1
California bearing ratio
ratio used to characterise the bearing capacity of a mixture, determined immediately after compaction,
or after a period of curing
3.2
immediate bearing index
immediate California bearing ratio test without surcharge
3.3
Proctor compactive effort
compactive effort used in the Proctor test described in EN 13286-2
3.4
modified Proctor compactive effort
compactive effort used in the modified Proctor test described in EN 13286-2
3.5
curing
period of time and storage condition between manufacture and testing of the specimen for the
California bearing ratio
5

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SIST EN 13286-47:2022
EN 13286-47:2021 (E)
4 Principle
The relationship between force and penetration is determined when a cylindrical piston of a standard
cross-sectional area is made to penetrate a specimen of a mixture, contained within a mould, at a given
rate.
The California bearing ratio or immediate bearing index is calculated by expressing the force on the
piston for a given penetration as a percentage of a reference force.
5 Apparatus
5.1 Apparatus for specimen manufacture
5.1.1 Proctor mould B with appropriate spacer disc, if required, conforming to EN 13286-2.
5.1.2 Rammer A or B, conforming to EN 13286-2.
5.1.3 Balance accurate to ± 0,1 % of mass weighed and capable of weighing up to 30 kg.
5.1.4 Apparatus conforming to EN 1097-5 for water content determination.
5.1.5 Miscellaneous apparatus including coarse filter papers, a steel straightedge, scrapers, etc.
5.2 Additional apparatus for soaking procedure and measurement of swelling
5.2.1 Base plate uniformly perforated for minimum 1 % of its surface.
5.2.2 Perforated top plate in
...

SLOVENSKI STANDARD
oSIST prEN 13286-47:2021
01-januar-2021
Nevezane in hidravlično vezane zmesi - 47. del: Preskusna metoda za ugotavljanje
kalifornijskega indeksa nosilnosti (CBR), neposrednega indeksa nosilnosti (IBI) in
linearnega nabrekanja
Unbound and hydraulically bound mixtures - Part 47: Test method for the determination
of California bearing ratio, immediate bearing index and linear swelling
Ungebundene und hydraulisch gebundene Gemische - Teil 47: Prüfverfahren zur
Bestimmung des CBR-Wertes (California bearing ratio), des direkten Tragindex (IBI) und
des linearen Schwellwertes
Mélanges traités et mélanges non traités aux liants hydrauliques - Partie 47: Méthode
d'essai pour la détermination de l'indice portant Californien (CBR), de l'indice de
portance immédiate (IPI) et du gonflement linéaire
Ta slovenski standard je istoveten z: prEN 13286-47
ICS:
93.080.20 Materiali za gradnjo cest Road construction materials
oSIST prEN 13286-47:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 13286-47:2021

---------------------- Page: 2 ----------------------
oSIST prEN 13286-47:2021


DRAFT
EUROPEAN STANDARD
prEN 13286-47
NORME EUROPÉENNE

EUROPÄISCHE NORM

November 2020
ICS 93.080.20 Will supersede EN 13286-47:2012
English Version

Unbound and hydraulically bound mixtures - Part 47: Test
method for the determination of California bearing ratio,
immediate bearing index and linear swelling
Mélanges traités et mélanges non traités aux liants Ungebundene und hydraulisch gebundene Gemische -
hydrauliques - Partie 47: Méthode d'essai pour la Teil 47: Prüfverfahren zur Bestimmung des CBR-
détermination de l'indice portant Californien (CBR), de Wertes (California bearing ratio), des direkten
l'indice de portance immédiate (IPI) et du gonflement Tragindex (IBI) und des linearen Schwellwertes
linéaire
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, 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: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13286-47:2020 E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------
oSIST prEN 13286-47:2021
prEN 13286-47:2020 (E)
Contents Page
European foreword . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Principle . 6
5 Apparatus . 6
6 Test sample for the California bearing ratio and immediate bearing index tests . 7
7 Specimen manufacture for the California bearing ratio and immediate bearing index
tests . 7
8 Curing for California bearing ratio test. 7
9 Procedure for California bearing ratio and immediate bearing index determination . 9
10 Calculation and expression of results . 10
11 Test report . 11
Annex A (normative) Different Types of Force-Penetration Curves . 12
A.1 Convex Upward Force-Penetration Curve . 12
A.2 Force-Penetration Curve with Inflexion Point S at X < 7,5 mm . 13
A.3 Concave Upward Force-Penetration Curve with Inflexion Point S at X > 7,5 mm . 14
2

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oSIST prEN 13286-47:2021
prEN 13286-47:2020 (E)
European foreword
This document (prEN 13286-47:2020) 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 13286-47:2012.
In comparison with the previous edition, the following technical modifications have been made:
— editorial changes;
— a revised Clause 10 that provides more information for the possible force-penetration curves and
where necessary their correction;
— a revised Annex A reflecting the revised Clause 10. The Annex A is normative.
This document is one of a series of standards as listed below:
— EN 13286-1, Unbound and hydraulically bound mixtures — Part 1: Test methods for laboratory
reference density and water content — Introduction, general requirements and sampling;
— EN 13286-2, Unbound and hydraulically bound mixtures — Part 2: Test methods for laboratory
reference density and water content — Proctor compaction;
— EN 13286-3, Unbound and hydraulically bound mixtures — Part 3: Test methods for laboratory
reference density and water content — Vibrocompression with controlled parameters;
— EN 13286-4, Unbound and hydraulically bound mixtures — Part 4: Test methods for laboratory
reference density and water content — Vibrating hammer;
— EN 13286-5, Unbound and hydraulically bound mixtures — Part 5: Test methods for laboratory
reference density and water content — Vibrating table;
— EN 13286-7, Unbound and hydraulically bound mixtures — Part 7: Cyclic load triaxial test for
unbound mixtures;
— EN 13286-40, Unbound and hydraulically bound mixtures — Part 40: Test method for the
determination of the direct tensile strength of hydraulically bound mixtures;
— EN 13286-41, Unbound and hydraulically bound mixtures — Part 41: Test method for the
determination of the compressive strength of hydraulically bound mixtures;
— EN 13286-42, Unbound and hydraulically bound mixtures — Part 42: Test method for the
determination of the indirect tensile strength of hydraulically bound mixtures;
— EN 13286-43, Unbound and hydraulically bound mixtures — Part 43: Test method for the
determination of the modulus of elasticity of hydraulically bound mixtures;
— EN 13286-44, Unbound and hydraulically bound mixtures — Part 44: Test method for the
determination of the alpha coefficient of vitrified blast furnace slag;
3

---------------------- Page: 5 ----------------------
oSIST prEN 13286-47:2021
prEN 13286-47:2020 (E)
— EN 13286-45, Unbound and hydraulically bound mixtures — Part 45: Test method for the
determination of the workability period of hydraulically bound mixtures;
— EN 13286-46, Unbound and hydraulically bound mixtures — Part 46: Test method for the
determination of the moisture condition value;
— EN 13286-47, Unbound and hydraulically bound mixtures — Part 47: Test method for the
determination of California bearing ratio, immediate bearing index and linear swelling;
— EN 13286-48, Unbound and hydraulically bound mixtures — Part 48: Test method for the
determination of degree of pulverisation;
— EN 13286-49, Unbound and hydraulically bound mixtures — Part 49: Accelerated swelling test for soil
treated by lime and/or hydraulic binder;
— EN 13286-50, Unbound and hydraulically bound mixtures — Part 50: Method for the manufacture of
test specimens of hydraulically bound mixtures using Proctor equipment or vibrating table
compaction;
— EN 13286-51, Unbound and hydraulically bound mixtures — Part 51: Method for the manufacture of
test specimens of hydraulically bound mixtures using vibrating hammer compaction;
— EN 13286-52, Unbound and hydraulically bound mixtures — Part 52: Method for the manufacture of
test specimens of hydraulically bound mixtures using vibrocompression;
— EN 13286-53, Unbound and hydraulically bound mixtures — Part 53: Methods for the manufacture of
test specimens of hydraulically bound mixtures using axial compression;
— CEN/TS 13286-54, Unbound and hydraulically bound mixtures — Part 54: Test method for the
determination of frost susceptibility — Resistance to freezing and thawing of hydraulically bound
mixtures.
4

---------------------- Page: 6 ----------------------
oSIST prEN 13286-47:2021
prEN 13286-47:2020 (E)
1 Scope
This document specifies the test methods for the laboratory determination of the California bearing
ratio and immediate bearing index.
The tests are appropriate to that part of the mixture up to a maximum particle size of 22,4 mm.
When immersion in water is specified as part of the curing of the specimen, this document also includes
the determination of vertical swelling of the specimen before the determination of the California
bearing ratio.
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 13286-2, Unbound and hydraulically bound mixtures - Part 2: Test methods for laboratory reference
density and water content - Proctor compaction
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
3.1
California bearing ratio
ratio used to characterise the bearing capacity of a mixture, determined immediately after compaction,
or after a period of curing
3.2
immediate bearing index
immediate California bearing ratio test without surcharge
3.3
Proctor compactive effort
compactive effort used in the Proctor test described in EN 13286-2
3.4
modified Proctor compactive effort
compactive effort used in the modified Proctor test described in EN 13286-2
3.5
curing
period of time and storage condition between manufacture and testing of the specimen for the
California bearing ratio
5

---------------------- Page: 7 ----------------------
oSIST prEN 13286-47:2021
prEN 13286-47:2020 (E)
4 Principle
The relationship between force and penetration is determined when a cylindrical piston of a standard
cross-sectional area is made to penetrate a specimen of a mixture, contained within a mould, at a given
rate.
The California bearing ratio or immediate bearing index is calculated by expressing the force on the
piston for a given penetration as a percentage of a reference force.
5 Apparatus
5.1 Apparatus for specimen manufacture
5.1.1 Proctor mould B with appropriate spacer disc, if required conforming to EN 13286-2.
5.1.2 Rammer A or B, conforming to EN 13286-2.
5.1.3 Balance accurate to ± 0,1 % of mass weighed and capable of weighing up to 30 kg.
5.1.4 Apparatus conforming to EN 1097-5:2008 for water content determination.
5.1.5 Miscellaneous apparatus including coarse filter papers, a steel straightedge, scrapers, etc.
5.2 Additional apparatus for soaking procedure and measurement of swelling
5.2.1 Base plate uniformly perforated for minimum 1 % of its surface.
5.2.2 Perforated top plate in aluminium alloy with adjustable stem to provide the seating for the
stem of a dial gauge.
5.2.3 Unperforated top plate in aluminium alloy with a thickness (10 ± 1) mm with adjustable stem
to provide the seating for the stem of a dial gauge.
5.2.4 Device for measuring the vertical expansion of the specimen for the California bearing ratio
accurate to 0,05 mm.
5.2.5 Soaking tank, large enough to allow the Proctor mould B to be submerged, preferably
supported on an open mesh platform.
5.2.6 Annular surcharge rings, each having a mass known to ± 100 g, an internal diameter of
(53 ± 1) mm and an external diameter equal to the diameter of the mould minus 5 mm.
Alternatively half-annular segments may be used.
5.3 Additional apparatus for determination of the California bearing ratio and
immediate bearing index
5.3.1 Cylindrical penetration piston with a diameter of (50 ± 0,5) mm, the lower en
...