BS EN 12350-9-2010 Testing fresh concrete nPart 9 Self-compacting concrete Vfunnel ntest《生混凝土试验 自密实混凝土 V形漏斗试验》.pdf

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1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 12350-9:2010Testing fresh concretePart 9: Self-compacting concrete V-funnel testBS EN 12350-9:2010 BRITISH STANDARDNational forewordThis British Standard is the UK implemen

2、tation of EN 12350-9:2010.The UK participation in its preparation was entrusted to TechnicalCommittee B/517/1, Concrete production and testing.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessa

3、ryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 69213 0ICS 91.100.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committ

4、ee on 31 August 2010Amendments issued since publicationDate Text affectedBS EN 12350-9:2010EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12350-9 July 2010 ICS 91.100.30 English Version Testing fresh concrete - Part 9: Self-compacting concrete - V-funnel test Essai pour bton frais - Partie 9:

5、Bton auto-plaant - Essai dcoulement lentonnoir en V Prfung von Frischbeton - Teil 9: Selbstverdichtender Beton - Auslauftrichterversuch 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

6、 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 off

7、icial 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 Austri

8、a, 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. EUROPE

9、AN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, 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 12350-9:2010: EBS EN 12350-9:2

10、010EN 12350-9:2010 (E) 2 Contents Page Foreword 31 Scope 52 Normative references 53 Principle 54 Apparatus .55 Test sample 66 Procedure .67 Test report 68 Repeatability and reproducibility .7Bibliography 8BS EN 12350-9:2010EN 12350-9:2010 (E) 3 Foreword This document (EN 12350-9:2010) has been prepa

11、red 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 nation

12、al 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

13、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 5thFrame Programme (GRD2-2000-30024/G6RD-CT-2001-00580).

14、 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

15、-situ properties (perfect filling of the mould and embedment of the reinforcement, homogeneity and full compaction) without vibration, the proper methods for testing the fresh SCC are very important. These should address three key properties: filling ability, passing ability and resistance to segreg

16、ation. 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 th

17、e recently closed EU-project “Testing-SCC“ under the 5thFrame 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

18、 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

19、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 BS EN 12350-9:2010EN 12350-9:2010 (E) 4 Part 9: Self-compacting concrete V-funnel test Part 10: Self-compacting concrete L

20、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 ce

21、ment 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 st

22、andards 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

23、, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 12350-9:2010EN 12350-9:2010 (E) 5 1 Scope This European Standard specifies the procedure for determining the V-funnel flow time for self-compacting concrete. The test is not suitable when the ma

24、ximum size of the aggregate exceeds 22,4 mm. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any am

25、endments) applies. EN 12350-1, Testing fresh concrete Part 1: Sampling 3 Principle The V-funnel test is used to assess the viscosity and filling ability of self-compacting concrete. A V shaped funnel is filled with fresh concrete and the time taken for the concrete to flow out of the funnel is measu

26、red and recorded as the V-funnel flow time. 4 Apparatus 4.1 V-funnel, made to the internal dimensions and tolerances in Figure 1, fitted with a quick release, watertight hinged or sliding gate at its base and supported by a frame so that the top of the funnel is horizontal with sufficient clearance

27、beneath the gate to place the container underneath. The V-funnel shall be made from metal which shall be reference material; the surfaces shall be smooth, and not readily attacked by cement paste or be liable to rusting. If the funnel is made from other materials, in-use performance test data shall

28、be available which demonstrates long-term equivalence with metal. 4.2 Container, to hold the test sample and having a volume not less than 12 l. 4.3 Stop watch, capable of measuring to 0,1 s. 4.4 Straight edge, for striking off concrete level with the top of the funnel. BS EN 12350-9:2010EN 12350-9:

29、2010 (E) 6 Dimensions in millimetres Key 1 Hinged or sliding gate Figure 1 V-funnel 5 Test sample A sample of at least 12 l shall be obtained in accordance with EN 12350-1. 6 Procedure Clean the funnel and bottom gate, then dampen all the inside surface including the gate. Close the gate and pour th

30、e sample of concrete into the funnel in one operation, without any agitation or mechanical compaction, then strike off the top with the straight edge so that the concrete is level with the top of the funnel. Place the container under the funnel in order to collect the concrete. After a delay of (10

31、2) s from filling the funnel, open the gate quickly and measure the time tv, to 0,1 s, from opening the gate to when it is possible to see vertically through the funnel into the container below for the first time. The time tv is the V-funnel flow time. The flow of concrete from the funnel shall be c

32、ontinuous. If a blockage occurs the test shall be repeated. If a second blockage occurs the concrete lacks the necessary viscosity and filling ability of self-compacting concrete. Report if a blockage has occurred. 7 Test report The test report shall include: a) identification of the test sample; b)

33、 location where the test was performed; c) date and time of test; BS EN 12350-9:2010EN 12350-9:2010 (E) 7 d) V-funnel flow time, tv, to the nearest 0,5 s; e) any deviation from the standard test method; f) declaration by the person technically responsible for the test that it was carried out in acco

34、rdance with this standard, except as noted in item e). The report may include: g) temperature of the concrete at the time of test; h) age of concrete at time of test (if known). 8 Repeatability and reproducibility The repeatability r and reproducibility R have been determined by a programme includin

35、g ten laboratories, 20 operators and two replicates, and interpreted in accordance with ISO 5725-2. The resulting values for r and R are given in Table 1. Table 1 Repeatability and reproducibility for typical values of V-funnel flow time V-funnel flow time tvin seconds 3,0 5,0 8,0 12,0 15,0 Repeatab

36、ility r in seconds 0,4 1,1 2,1 3,4 4,4 Reproducibility R in seconds 0,6 1,6 3,1 5,1 6,6 BS EN 12350-9:2010EN 12350-9:2010 (E) 8 Bibliography 1 ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibil

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