SIST EN 12350-12:2010
(Main)Testing fresh concrete - Part 12: Self-compacting concrete - J-ring test
Testing fresh concrete - Part 12: Self-compacting concrete - J-ring test
This European Standard specifies the procedure for determining the passing ability (measured by the blocking step), the flow spread and t500J flow time of self-compacting concrete as the concrete flows through the J-ring. The test is not suitable when the maximum size of aggregate exceeds 40 mm.
Prüfung von Frischbeton - Teil 12: Selbstverdichtender Beton - Blockierring-Versuch
Essai pour béton frais - Partie 12 : Béton auto-plaçant - Essai d'écoulement à l'anneau
La présente norme spécifie la méthode de détermination de l'aptitude à l'écoulement en milieu confiné (mesurée par le palier de blocage), l'étalement et le temps d'étalement t500J du béton auto-plaçant lorsque le béton s'écoule à travers un anneau supportant une grille d’armatures.
Cet essai ne convient pas lorsque le diamètre maximum des granulats excède 40 mm.
NOTE En ce qui concerne la relation entre le diamètre des granulats et l’espacement des barres, l’essai est destiné à évaluer le taux de remplissage du béton proposé pour un espacement des barres représentatif des ouvrages à bétonner. Si le béton se bloque, il se peut que le diamètre des granulats soit trop important pour cette application.
Preskušanje svežega betona - 12. del: Samozgoščevalni beton - Preskus z J-obročem
Ta evropski standard določa postopek za ugotavljanje zmožnosti prehodnosti (merjene z ukrepom blokiranja), obseg razleza in t500J čas razleza za samozgoščevalni beton, ko se beton pretaka skozi J-obroč. Ta preskus ni ustrezen, če največja velikost agregata presega 40 mm.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.REURþHPPrüfung von Frischbeton - Teil 12: Selbstverdichtender Beton - Blockierring-VersuchEssai pour béton frais - Partie 12 : Béton auto-plaçant - Essai d'écoulement à l'anneauTesting fresh concrete - Part 12: Self-compacting concrete - J-ring test91.100.30Beton in betonski izdelkiConcrete and concrete productsICS:Ta slovenski standard je istoveten z:EN 12350-12:2010SIST EN 12350-12:2010en,fr,de01-december-2010SIST EN 12350-12:2010SLOVENSKI
STANDARD
SIST EN 12350-12:2010
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12350-12
July 2010 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 - Essai d'écoulement à l'anneau
Prüfung von Frischbeton - Teil 12: Selbstverdichtender Beton - Blockierring-Versuch This European Standard was approved by CEN on 20 June 2010.
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 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 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12350-12:2010: ESIST EN 12350-12:2010
EN 12350-12:2010 (E) 2 Contents Page Foreword .31Scope .52Normative references .53Principle .54Apparatus .55Test sample .76Procedure .77Expression of results .88Test report .89Repeatability and reproducibility .9Bibliography . 10 SIST EN 12350-12:2010
EN 12350-12:2010 (E) 3 Foreword This document (EN 12350-12:2010) has been prepared by Technical Committee CEN/TC 104 “Concrete and related products”, the secretariat of which is held by DIN. 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 January 2011, and conflicting national standards shall be withdrawn at the latest by January 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). 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 widely accepted by the construction owners. The use of SCC in practical concrete construction is steadily 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 fresh SCC are very important. The consistence 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 consistence of fresh SCC before casting in place. A number of test methods including this test 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. EN 12350, Testing fresh concrete, consists of the following parts: 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 SIST EN 12350-12:2010
EN 12350-12:2010 (E) 4 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. According to the CEN/CENELEC Internal Regulations, the national standards organizations 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. SIST EN 12350-12:2010
EN 12350-12:2010 (E) 5 1 Scope This European Standard specifies the procedure for determining the passing ability (measured by the blocking step), the flow spread and t500J flow time of self-compacting concrete as the concrete flows through the J-ring.
The test is not suitable when the
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