BS EN 12350-3-2009 Vebe Test.pdf

Licensed copy: Universiti Sains Malaysia, Universiti Sains Malaysia, Version correct as of 28/12/2009 04:52, (c) BSIBRITISH STANDARD Testing fresh concrete Part 3: Vebe test ICS 91.100.30, NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 12350-3:2009 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2009 © BSI 2009 ISBN 978 0 580 58790 0 Amendments/corrigenda issued since publication Date Comments . Version correct as of 28/12/2009 04:52. Compliance with a British Standard cannot confer immunity from legal obligations. Concrete production and testing. The UK participation in its preparation was entrusted to Technical Committee B/517/1. Users are responsible for its correct application.Licensed copy: Universiti Sains Malaysia. It supersedes BS EN 12350-3:2000 which is withdrawn. This publication does not purport to include all the necessary provisions of a contract. (c) BSI BS EN 12350-3:2009 National foreword This British Standard is the UK implementation of EN 12350-3:2009. Universiti Sains Malaysia. A list of organizations represented on this committee can be obtained on request to its secretary. 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. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: Avenue Marnix 17. Slovenia.30 Supersedes EN 12350-3:1999 English Version Testing fresh concrete . (c) BSI BS EN 12350-3:2009 EUROPEAN STANDARD EN 12350-3 NORME EUROPÉENNE EUROPÄISCHE NORM March 2009 ICS 91.Part 3: Vebe test Essais pour béton frais . Lithuania. Ref. Switzerland and United Kingdom. Czech Republic. Hungary. EN 12350-3:2009: E . Version correct as of 28/12/2009 04:52. B-1000 Brussels © 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. German). Portugal. This European Standard exists in three official versions (English. Latvia.100. Ireland. Poland. Bulgaria. Netherlands. Luxembourg. Denmark. Belgium. French. Estonia. Finland.Teil 3: Vebe-Prüfung This European Standard was approved by CEN on 20 January 2009. Sweden.Licensed copy: Universiti Sains Malaysia. Spain. Universiti Sains Malaysia.Partie 3: Essai Vébé Prüfung von Frischbeton . Greece. 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. France. Cyprus. Italy. No. 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. CEN members are the national standards bodies of Austria. Malta. Iceland. Germany. Norway. Romania. Slovakia. 5 4 Apparatus . (c) BSI BS EN 12350-3:2009 EN 12350-3:2009 (E) Contents Page Foreword .................. Version correct as of 28/12/2009 04:52......................................................................................................................................................................................................Licensed copy: Universiti Sains Malaysia...................................................................................................................6 6 Procedure .............................................................................................................................................5 5 Sampling ..............................................................5 2 Normative references .............................................................................................................................................................................................................................................................................................................................8 2 .......................................................................................................................................................................................................................................................................................................................7 8 Test report ........................................3 1 Scope ......................................................7 9 Precision ................... Universiti Sains Malaysia..................6 7 Test result .........................................................................................5 3 Principle ............................................................ Pressure methods. CAUTION — When cement is mixed with water. Part 8: Self-compacting concrete . Prevent skin contact with wet cement or concrete by wearing suitable protective clothing. If cement or concrete enters the eye. Part 12: Self-compacting concrete . Part 11: Self-compacting concrete . Part 6: Density.L-box test (in preparation). Part 3: Vebe test. and conflicting national standards shall be withdrawn at the latest by September 2009.V-funnel test (in preparation). either by publication of an identical text or by endorsement. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. immediately wash it out thoroughly with clean water and seek medical treatment without delay.Sieve segregation test (in preparation). at the latest by September 2009. Universiti Sains Malaysia.Slump-flow test (in preparation). Part 2: Slump-test. (c) BSI BS EN 12350-3:2009 EN 12350-3:2009 (E) Foreword This document (EN 12350-3:2009) has been prepared by Technical Committee CEN/TC 104 “Concrete and related products”. Part 9: Self-compacting concrete .J-ring test (in preparation). Wash wet concrete off the skin immediately. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. Take precautions to avoid dry cement entering the eyes. the secretariat of which is held by DIN. Part 7: Air content . This European Standard shall be given the status of a national standard. This series EN 12350 includes the following parts. 3 . This document supersedes EN 12350-3:1999. mouth and nose whilst mixing concrete. Version correct as of 28/12/2009 04:52. Part 1: Sampling. This standard is one of a series concerned with testing concrete.Licensed copy: Universiti Sains Malaysia. Part 10: Self-compacting concrete . Part 4: Degree of compactability. alkali is released. Part 5: Flow table test. Switzerland and the United Kingdom. Iceland. Sweden. Lithuania. Czech Republic. Bulgaria. Hungary. Germany. Netherlands. Portugal. Italy. Spain. Norway. Ireland. Version correct as of 28/12/2009 04:52. Luxembourg. (c) BSI BS EN 12350-3:2009 EN 12350-3:2009 (E) The following amendments have been made to the 1999-10 edition of this standard:  editorial revision  time allowed for raising the mould changed from between 5 s and 10 s to between 2 s and 5 s. Greece.Licensed copy: Universiti Sains Malaysia. Romania. Denmark. Cyprus. France. Belgium. Malta. According to the CEN/CENELEC Internal Regulations. Estonia. Poland. 4 . Universiti Sains Malaysia. Latvia. Slovenia. the national standards organizations of the following countries are bound to implement this European Standard: Austria. Slovakia. Finland. made of metal not readily attacked by cement paste and not thinner than 1.1 Container. The thickness of the wall shall be approximately 3 mm and that of the base approximately 7. 4 4. only the edition cited applies. For undated references.  diameter of top: (100 ± 2) mm. The vibrating table is started and the time taken for the lower surface of the transparent disc to be fully in contact with the grout (the Vebe time). The mould shall be in the form of a hollow frustum of a cone having the following internal dimensions:  diameter of base: (200 ± 2) mm.1 Apparatus Vebe meter (Consistometer) 4. the latter enabling it to be securely clamped to the top of the vibrating table (G) (see 4. 5 .1. For dated references. Version correct as of 28/12/2009 04:52. cylindrical in shape (A). EN 12350-1 Testing fresh concrete — Part 1: Sampling 3 Principle The fresh concrete is compacted into a slump mould.2 Mould. The mould shall be provided. to facilitate lifting it from the moulded concrete test specimen in a vertical direction. The container shall be watertight and of sufficient rigidity to retain its shape under rough usage. the latest edition of the referenced document (including any amendments) applies. If the Vebe time is less than 5 s or more than 30 s.4) by means of wing nuts (H). Universiti Sains Malaysia.5 mm. having an internal diameter of (240 ± 5) mm and a height of (200 ± 2) mm.5 mm. The slump of the concrete is recorded. with two handles at approximately two-thirds of the height.  height: (300 ± 2) mm. 2 Normative references The following referenced documents are indispensable for the application of this document. made of metal not readily attacked by cement paste. the concrete has a consistency for which the Vebe test is unsuitable. The interior of the mould shall be smooth and free from projections such as protruding rivets and shall be free from dents. on the upper portion. The base and the top of the mould shall be open and parallel to each other and at right angles to the axis. 4. It shall be fitted with handles and brackets.1.1. It is not applicable to concrete of which the maximum size of aggregate exceeds 63 mm. is measured. as required by the test.Licensed copy: Universiti Sains Malaysia. The mould is lifted clear of the concrete and a transparent disc is swung over the top of the concrete and carefully lowered until it comes in contact with the concrete. (c) BSI BS EN 12350-3:2009 EN 12350-3:2009 (E) 1 Scope This European Standard specifies a method for determining the consistency of fresh concrete by means of the Vebe time. The transparent disc shall be (230 ± 2) mm in diameter and (10 ± 2) mm in thickness.7 Moist cloth.6 Shovel. attached to a rod (J) which slides vertically through a guide sleeve (E) mounted on a swivel arm (N) and which can be fixed in position by a screw (Q). It shall be of appropriate dimensions such that the concrete can be thoroughly remixed. of circular cross-section. the bottom of which coincides with the top of the conical mould when the latter is positioned concentrically in the container. When in the appropriate position.5 mm. Dampen the mould (B) and place it in the container. Compact each layer with 25 strokes of the compacting rod. 4. Swing the funnel (D) into position over the mould and lower onto the mould. the axes of the rod and of the funnel shall be coincident with the axis of the container. capable of recording time to an accuracy of 0. A weight (P) placed directly above the disc shall be provided such that the moving assembly comprising rod.8 Scoop. disc and weight has a mass of (2 750 ± 50) g.5 s. (c) BSI BS EN 12350-3:2009 EN 12350-3:2009 (E) 4. transparent. made of steel.Licensed copy: Universiti Sains Malaysia. 5 Sampling The sample shall be obtained in accordance with EN 12350-1. 4. Version correct as of 28/12/2009 04:52. straight. 6 Alternative sampling procedures may be given in national standards or provisions in the place of use of Procedure Place the Vebe meter on a rigid horizontal base. The swivel arm also supports a funnel (D). 4.5 Remixing container. width approximately 100 mm. 4. 4.3 Compacting rod. fill the mould in three layers. with square mouth NOTE The square mouth is required to ensure proper mixing of material on the re-mixing tray.4 Stopwatch or clock. having a diameter of approximately 16 mm and length approximately 600 mm and with rounded ends. Tighten the screw (F) so that the mould cannot rise from the bottom of the container.1.2 Vibrating table (G). The swivel arm is located by a holder (M) and can be fixed in position by a set screw (F). NOTE concrete. using the square-mouthed shovel. horizontal (C). From the sample of concrete obtained in accordance with Clause 5. flat tray of rigid construction and made from a non-absorbent material not readily attacked by cement paste. 4. having minimum dimensions of (380 ± 3) mm in length and (260 ± 3) mm in width and supported on four rubber shock absorbers on a hollow base (K). The rod shall be provided with a scale at 5 mm intervals to record the slump of the concrete. The sample shall be re-mixed using the remixing container and the square mouthed shovel before carrying out the test. ensuring that the strokes are uniformly distributed over the cross-section of each layer. 6 . Universiti Sains Malaysia. 4. ensuring that the container (A) is firmly fixed to the vibrating table (G) by means of the wing nuts (H). each approximately one-third of the height of the mould when compacted. A vibrator unit (L) is securely fixed to the bottom of the table. The vibrator shall operate at a nominal frequency of 50 Hz to 60 Hz and the vertical amplitude of the table with the empty container on top of it shall be approximately ±0.3 Disc. which in turn rests on three rubber feet. Licensed copy: Universiti Sains Malaysia. as shown in Figure 2a) has been obtained. c) date of test. 8 Test report The report shall include: a) identification of the test sample. this will necessitate inclining the rod slightly and positioning approximately half the strokes spirally toward the centre. add further concrete to maintain an excess above the top of the mould throughout the compacting operation. Compact the second layer and the top layer throughout its depth. collapses. Observe the way the concrete is remoulded through the transparent disc (C). After the top layer has been tamped. as shown in Figure 2c). In filling and tamping the top layer. Tests on different samples should. to the nearest second. As soon as the lower surface of the disc (C) is fully in contact with the cement grout. without interruption. Swing the transparent disc (C) over the top of the concrete. when the disc (C) just touches the highest point of the concrete. loss of moisture. Universiti Sains Malaysia. Version correct as of 28/12/2009 04:52. NOTE The consistence of a concrete mix changes with time. heap the concrete above the mould before tamping is started. 7 Test result Record the time read from the stopwatch. Record the time taken to the nearest second. Read and record the value of the slump from the scale (J). Perform the operation of raising the mould in 2 s to 5 s by a steady upward lift with no lateral or torsional motion being imparted to the concrete. If the concrete shears. Carry out the entire operation. as shown in Figure 2b). If the concrete has not slumped into contact with the wall of the container (A). 7 . due to hydration of the cement and. record the fact. (c) BSI BS EN 12350-3:2009 EN 12350-3:2009 (E) For the bottom layer. be carried out at a constant time interval after mixing. and a slump. loosen the screw (Q) and lower the disc very carefully until it just comes into contact with the concrete. taking care not to strike the base. If there has not been a true slump ensure that screw (Q) is loosened to allow the disc (C) to slide down into the container to rest on the concrete. possibly. This is the Vebe time. therefore. so that the strokes just penetrate into the underlying layer. and complete within 5 minutes. or slumps to the extent that it touches the wall of the container (A). record the fact. If necessary. Start the vibration of the table and the timer simultaneously. loosen the screw (F) and raise the funnel (D) and swing it out of the way and tighten the screw (F) in the new position. Loosen the screw (Q) to allow the disc (C) to easily slide down into the container to rest fully on the concrete. stop the timer and switch off the vibrating table. expressing the consistency of the mix under test. Provided there has been a true slump. b) location of performance of test. Remove the mould (B) from the concrete by raising it carefully in a vertical direction. from the start of the filling. using the handles. if strictly comparable results are to be obtained. Ensure that the mould (B) does not rise or move prematurely and concrete is not allowed to fall into the container (A). Strike off the concrete level with the top of the mould with a sawing and rolling motion of the compacting rod. tighten the screw (Q). Compact the concrete throughout its whole depth. (c) BSI BS EN 12350-3:2009 EN 12350-3:2009 (E) d) type of slump — true/collapse/shear. f) Vebe time in s. h) declaration by the person technically responsible for the test that it was carried out in accordance with this document. except as noted in item g). The report may include: i) temperature of the concrete sample at time of test. Universiti Sains Malaysia. to nearest 10 mm (if appropriate). j) time of test. Dimensions in millimetres Key: A Container B Mould C Transparent disc D Funnel E Guide sleeve F Screw G Vibrating table H Wing nuts J K L M N P Q Y-Y X-X Scale Hollow base Vibrator unit Holder Swivel arm Weight Screw Detail Detail Figure 1 — Typical Consistometer (Vebe meter) 8 . e) measured true slump. Version correct as of 28/12/2009 04:52. 9 Precision There is currently no precision data for this test. g) any deviation from standard test method.Licensed copy: Universiti Sains Malaysia. (c) BSI BS EN 12350-3:2009 EN 12350-3:2009 (E) a) True slump b) Shear Slump c) Collapse slump Figure 2 — Forms of slump 9 .Licensed copy: Universiti Sains Malaysia. Version correct as of 28/12/2009 04:52. Universiti Sains Malaysia. Except as permitted under the Copyright. European and international standards through its Library and its Technical Help to Exporters Service. Tel: +44 (0)20 8996 7111 Fax: +44 (0)20 8996 7048 Email: info@bsigroup. the identity of which can be found on the inside front cover. and size. London. it is BSI policy to supply the BSI implementation of those that have been published as British Standards. Universiti Sains Malaysia. For details of these and other benefits contact Membership Administration. of necessary details such as symbols. Fax: +44 (0)20 8996 7001 Email: orders@bsigroup. Designs and Patents Act 1988 no extract may be reproduced. 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