1、August 2009DEUTSCHE NORM English price group 8No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 91.100.30!$Y(:“1540523ww
2、w.din.deDDIN EN 12350-5Testing fresh concrete Part 5: Flow table testEnglish version of DIN EN 12350-5:2009-08Prfung von Frischbeton Teil 5: AusbreitmaEnglische Fassung DIN EN 12350-5:2009-08SupersedesDIN EN 12350-5:2000-06www.beuth.deDocument comprises 13 pagesDIN EN 12350-5:2009-08 National forewo
3、rd This standard has been prepared by Technical Committee CEN/TC 104 “Concrete and related products” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Bauwesen (Building and Civil Engineering Standards Committee), Technical Committee NA 005-
4、07-05 AA Prfverfahren fr Beton. Amendments This standard differs from DIN EN 12350-5:2000-06 as follows: a) The standard has been editorially revised. b) The information has been included that the test is not applicable for self-compacting concrete. c) The description of the test procedure has been
5、revised and the time for each cycle of lifting and dropping the mould has been changed from between 2 s and 5 s to between 1 s and 3 s. Previous editions DIN EN 12350-5: 2000-06 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12350-5 March 2009 ICS 91.100.30 Supersedes EN 12350-5:1999 English
6、 Version Testing fresh concrete Part 5: Flow table test Essais pour bton frais Partie 5: Essai dtalement la table chocs Prfung von Frischbeton Teil 5: Ausbreitma This European Standard was approved by CEN on 20 January 2009. CEN members are bound to comply with the CEN/CENELEC Internal Regulations w
7、hich 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
8、 Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions. CEN members are the national
9、 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 Unite
10、d Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12350-5:2009:
11、 EEN 12350-5:2009 (E) 2 Contents Page Foreword 3 1 Scope 5 2 Normative references 5 3 Principle 5 4 Apparatus .5 5 Sampling .8 6 Procedure .9 7 Test results 10 8 Test report . 10 9 Precision 10 DIN EN 12350-5:2009-08 EN 12350-5:2009 (E) 3 Foreword This document (EN 12350-5:2009) has been prepared by
12、 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 September 2009, and conflicting national s
13、tandards shall be withdrawn at the latest by September 2009. 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 supersedes
14、EN 12350-5:1999. This standard is one of a series concerned with testing concrete. This series EN 12350 includes 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 me
15、thods; Part 8: Self-compacting concrete - Slump-flow test (in preparation); Part 9: Self-compacting concrete - V-funnel test (in preparation); Part 10: Self-compacting concrete - L-box test (in preparation); Part 11: Self-compacting concrete - Sieve segregation test (in preparation); Part 12: Self-c
16、ompacting concrete - J-ring test (in preparation). 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
17、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. DIN EN 12350-5:2009-08 EN 12350-5:2009 (E) 4 The following amendments have been made to the 1999-10 edition of this standard: e
18、ditorial revision indication that the test is not applicable for self-compacting concrete clarification of carrying out the test and the time for each cycle of lifting and dropping the mould to be between 1 s and 3 s (was not less than 2 s nor more than 5 s). According to the CEN/CENELEC Internal Re
19、gulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Ne
20、therlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 12350-5:2009-08 EN 12350-5:2009 (E) 5 1 Scope This European standard specifies a method for determining the flow of fresh concrete. It is not applicable to self-compacting conc
21、rete, foamed concrete or no-fines concrete, nor to concrete with maximum aggregate size exceeding 63 mm. NOTE The flow test is sensitive to changes in the consistency of concrete, which correspond to flow values between 340 mm and 600 mm. Beyond these extremes the flow table test may be unsuitable a
22、nd other methods of determining the consistence should be considered. 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 d
23、ocument (including any amendments) applies. EN 12350-1, Testing fresh concrete Part 1: Sampling 3 Principle This test determines the consistency of fresh concrete by measuring the spread of concrete on a flat plate which is subjected to jolting. 4 Apparatus 4.1 Flow table (see Figure 1) consisting o
24、f: a moving table made from a flat plate with a plane area of (700 2) mm (700 2) mm, on which concrete can be placed, hinged to a rigid base onto which it can fall from a fixed height. The flow table top shall have a flat metal surface with a minimum thickness of 2 mm. The metal surface shall not be
25、 readily attacked by cement paste or be liable to rusting. The flow table top shall have a mass of (16 0,5) kg and may be detachable using a pin-hinge to allow weighing. The construction of the plate shall be such as to prevent distortion of the upper surface. The table top shall be hinged to the ba
26、se in such a way that no aggregate can become trapped between the hinged surfaces. The centre of the table shall be scribed with a cross, the lines of which run parallel to the edges of the plate and with a central circle (210 1) mm in diameter. At the front corners of the plate two hard and rigid b
27、locks shall be firmly attached to the underside. They should not deform when wet and be non-absorbent. These stops shall transfer the load of the table top to the base without distorting the table. The base frame shall be constructed so that this load is transferred directly to the surface on which
28、the apparatus is placed. This minimizes the tendency for the table top to bounce when allowed to fall freely. Foot rests shall be provided to assist in stabilizing the table in use. The fall height of the table top measured at the centre line of the front edge of the top plate shall be limited to (4
29、0 1) mm by means of one or more stops. For lifting the table top, a handle or lifting mechanism shall be provided to ensure that the top is lifted without jerking and allowed to fall freely over the entire lifting height. DIN EN 12350-5:2009-08 EN 12350-5:2009 (E) 6 4.2 Mould, to form the test speci
30、men, made of metal not readily attacked by cement paste and not thinner than 1,5 mm. The interior of the mould shall be smooth and free from projections, such as protruding rivets and shall be free from dents. The mould shall be in the form of a hollow frustum of a cone having the following internal
31、 dimensions: diameter of base: (200 2) mm; diameter of top: (130 2) mm; height: (200 2) mm. The base and the top shall be open and parallel to each other and at right angles to the axis of the cone. The mould shall be provided with two handles, on the upper portion, and fixing clamps or foot pieces
32、on the bottom portion to hold it steady (see Figure 2). A mould which can be clamped to the base is acceptable provided the clamping arrangement can be fully released without movement of the mould or interference with the slumping concrete. NOTE Magnets can be used to assist in positioning the mould
33、. 4.3 Tamping bar, made of hard material, having a square section of side (40 1) mm and a length of approximately 200 mm. A further 120 mm to 150 mm may be turned to a circular section to form a handle to the bar (see Figure 3) 4.4 Rule or measuring tape, of minimum length 700 mm and having sub-divi
34、sions not greater than 5 mm along its entire length. 4.5 Remixing container, flat tray of rigid construction and made from a non-absorbent material not readily attacked by cement paste. It shall be of appropriate dimensions such that the concrete can be thoroughly re-mixed, using the square-mouthed
35、shovel. 4.6 Shovel, with square mouth NOTE The square mouth is required to ensure proper mixing of concrete on the remixing container. 4.7 Moist cloth 4.8 Scoop, approximately 100 mm in width. 4.9 Timer or watch, capable of measuring time to 1 s. DIN EN 12350-5:2009-08 EN 12350-5:2009 (E) 7 Key 1 Me
36、tal plate 2 Travel limited to (40 1) 3 Upper stop 4 Table top 5 External hinges 6 Markings 7 Base frame 8 Lifting handle 9 Lower stop 10 Toe board Figure 1 Typical flow table DIN EN 12350-5:2009-08 EN 12350-5:2009 (E) 8 Dimensions in millimetres Figure 2 Mould Dimensions in millimetres Figure 3 Tamp
37、ing bar 5 Sampling The sample of the concrete shall be obtained in accordance with EN 12350-1. The sample shall be re-mixed before carrying out the test using the remixing container and the square mouthed shovel. NOTE Alternative sampling procedures may be given in national standards or provisions i
38、n the place of use of concrete. DIN EN 12350-5:2009-08 EN 12350-5:2009 (E) 9 6 Procedure Place the flow table on a flat and horizontal surface free from external vibration or shock. Ensure that the hinged top of the table can be lifted to the correct limit of its travel and is then free to fall to t
39、he lower stop. Support the table in such a way that when the top of the table fails to the lower stop, there is minimal tendency for the top to bounce. Clean the table and the mould and dampen immediately prior to testing, but keep free from superfluous moisture. Keep the contact blocks clean. Place
40、 the mould centrally on the table top and hold in position by standing on the two foot pieces, or by using magnets. Fill the mould with concrete in two equal layers using the scoop, levelling each layer by tamping lightly ten times with the compacting bar. If necessary add more concrete to the secon
41、d layer to maintain an excess above the top of the mould. Using the compacting bar, strike off the concrete level with the upper edge of the mould and clean the area of the table top of any excess concrete. After waiting 30 s from striking off the concrete, raise the mould vertically by the handles,
42、 over a period of 1 s to 3 s. Stabilize the flow table by standing on the toe board at the front of the table and slowly raise the table top till it reaches the upper stop in such a manner that the table top does not impact hard against the upper stop. Allow the table top to fall freely to the lower
43、 stop. Repeat this cycle to give a total of 15 drops, each cycle taking between 1 s and 3 s. With the rule, measure the maximum dimension of the concrete spread in the two directions, d1and d2, (see Figure 4), parallel to the table edges and record the two measurements to the nearest 10 mm. Figure 4
44、 Measurement of spread Check the concrete spread for segregation. The cement paste may segregate from the coarse aggregate to give a ring of paste extending several millimetres beyond the coarse aggregate. Report whether segregation has occurred and if so that the test was therefore unsatisfactory.
45、After 15 cycles, if spread is not stabilized, wait until stabilization before measuring and record time between the end of the cycles and measurement. This time shall be mentioned in report. NOTE The consistence of a concrete mix changes with time, due to hydration of the cement and, possibly, loss
46、of moisture. Tests on different samples should be carried out at a constant time interval after mixing, if strictly comparable results are to be obtained. DIN EN 12350-5:2009-08 EN 12350-5:2009 (E) 10 7 Test results The flow value f, is given by the formula:221ddf+= where: d1is the maximum dimension
47、 of the concrete spread, parallel to one table edge d2is the maximum dimension of the concrete spread, parallel to the other table edge The result shall be reported to the nearest 10 mm. 8 Test report The report shall include: a) identification of the test sample; b) location of performance of test;
48、 c) date of test; d) any indication of segregation of the concrete; e) for viscous concrete as defined above, time between the end of the cycles and measurement (in seconds); f) the flow value, f, to nearest 10 mm; g) any deviation from standard test method; h) declaration by the person technically
49、responsible for the test that it was carried out in accordance with this document, except as noted in item f). The report may include: i) temperature of the concrete specimen at time of test; j) time of performance of the test. 9 Precision Precision data are given in Table 1. These apply to flow measurements made on concrete taken from the same sample and when each test result is obtained from a single flow determination. DIN EN 12350-5:2009-08 EN 12350-5:2009 (E) 11 Table 1 Precision data for flow measurement Le
