oSIST prEN 12350-12:2008

SLOVENSKI STANDARD
01-januar-2008
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Testing fresh concrete - Part 12: Self-compacting concrete - J-ring test
Prüfung von Frischbeton - Teil 12: Selbstverdichtender Beton - Blockierring-Versuch
Essai pour béton frais - Partie 12 : Béton auto-plaçant - Essai d’écoulement a l’anneau
Ta slovenski standard je istoveten z: prEN 12350-12
ICS:
91.100.30 Beton in betonski izdelki Concrete and concrete
products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
DRAFT
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2007
ICS 91.100.30
English Version
Testing fresh concrete - Part 12: Self-compacting concrete - J-
ring test
Essai pour béton frais - Partie 12 : Béton auto-plaçant - Prüfung von Frischbeton - Teil 12: Selbstverdichtender
Essai d'écoulement à l'anneau Beton - Blockierring-Versuch
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 104.
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 Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland 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
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12350-12:2007: E
worldwide for CEN national Members.

Contents Page
Foreword.3
1 Scope.4
2 Normative references.4
3 Principle.4
4 Apparatus.4
4.1 Narrow gap J-ring .4
4.2 Wide gap J-ring.4
5 Test sample.6
6 Procedure.6
7 Expression of results.7
8 Test report.7
9 Precision.8

Foreword
This document (prEN 12350-12:2007) has been prepared by Technical Committee CEN/TC 104 “Concrete
and related products”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This standard is based on the results from the EU-project “Testing-SCC” under the 5th Frame Programme
(GRD2-2000-30024/G6RD-CT-2001-00580).
Owing to its significant advantages in the improvement of construction quality and working environment, self-
compacting concrete (SCC) has been more widely accepted by the construction owners. The use of SCC in
practical concrete construction is stably increasing. Since SCC has to give satisfactory in-situ properties
(perfect filling of the mould and embedment of the reinforcement, homogeneity and full compaction) without
vibration, the proper methods for testing the workability of fresh SCC are very important. The workability of
fresh SCC should basically include three key properties: filling ability, passing ability and resistance to
segregation. It is desirable, especially in the case of new constituents or new concrete compositions, to test
the workability of fresh SCC before casting in place.
A number of test methods are available for testing fresh SCC. Most of the commonly used test methods were
evaluated in the recently closed EU-project “Testing-SCC” under the 5th Frame Programme (GRD2-2000-
30024/G6RD-CT-2001-00580). According to the results from this EU project, it seems no single test method
can completely cover all the three key properties. Nevertheless any test method should at least be correlated
to the practical situation and give consistent results in order to provide reliable data for judgment of concrete
workability.
This standard is one of a series concerned with testing fresh concrete.
This series EN 12350 includes the following parts.
EN 12350 Testing fresh concrete
— Part 1: Sampling;
— Part 2: Slump test;
— Part 3: Vebe test;
— Part 4: Degree of compactability;
— Part 5: Flow table test;
— Part 6: Density;
— Part 7: Air content — Pressure methods;
— Part 8: Self compacting concrete - Slump-flow test;
— Part 9: Self compacting concrete - V-funnel test;
— Part 10: Self compacting concrete - L-box test;
— Part 11: Self compacting concrete - Sieve segregation test;
— Part 12: Self compacting concrete - J-ring test.
Caution When cement is mixed with water, alkali is released. Take precautions to avoid dry cement
entering the eyes, mouth and nose whilst mixing concrete. Prevent skin contact with wet cement or concrete
by wearing suitable protective clothing. If cement or concrete enters the eye, immediately wash it out
thoroughly with clean water and seek medical treatment without delay. Wash wet concrete off the skin
immediately.
1 Scope
...