DIN EN 12350-4-2009 Testing fresh concrete - Part 4 Degree of compactability English version of DIN EN 12350-4 2009-08《新拌混凝土试验 第4部分 压实度 英文版本DIN EN 12350-4-2009-08》.pdf

1、August 2009DEUTSCHE NORM English price group 7No 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(9“1540522ww

2、w.din.deDDIN EN 12350-4Testing fresh concrete Part 4: Degree of compactabilityEnglish version of DIN EN 12350-4:2009-08Prfung von Frischbeton Teil 4: VerdichtungsmaEnglische Fassung DIN EN 12350-4:2009-08SupersedesDIN EN 12350-4:2000-06www.beuth.deDocument comprises 10 pagesNational foreword This st

3、andard 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 005-07-05 AA P

4、rfverfahren fr Beton. Amendments This standard differs from DIN EN 12350-4:2000-06 as follows: a) The standard has been editorially revised. b) The minimum frequency of the vibrating table has been corrected from 2400 cycles per second to 2400 cycles per minute. Previous editions DIN EN 12350-4: 200

5、0-06 2 DIN EN 12350-4:2009-08 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12350-4 March 2009 ICS 91.100.30 Supersedes EN 12350-4:1999 English Version Testing fresh concrete Part 4: Degree of compactability Essais pour bton frais Partie 4: Indice de serrage Prfung von Frischbeton Teil 4: Ver

6、dichtungsma This European Standard was approved by CEN on 20 January 2009. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliogr

7、aphical 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 translationunder the responsibility of a

8、 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 standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland,

9、Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-

10、1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12350-4:2009: EEN 12350-4:2009 (E) 2 Contents PageForeword 3 1 Scope 5 2 Normative references 5 3 Principle 5 4 Apparatus .5 5 Sampling .7 6 Procedure .7 7 Expressi

11、on of results 7 8 Test report 8 9 Precision .8 DIN EN 12350-4:2009-08 EN 12350-4:2009 (E) 3 Foreword This document (EN 12350-4:2009) 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

12、 status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2009, and conflicting national standards shall be withdrawn at the latest by September 2009. Attention is drawn to the possibility that some of the elements of this document may b

13、e 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 EN 12350-4:1999. This standard is one of a series concerned with testing concrete. This series EN 12350 includes the following parts. Part 1: Sampl

14、ing; 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 (in preparation); Part 9: Self-compacting concrete - V-funnel test (in preparation); Part

15、 10: Self-compacting concrete - L-box test (in preparation); Part 11: Self-compacting concrete - Sieve segregation test (in preparation); Part 12: Self-compacting concrete - J-ring test (in preparation). CAUTION When cement is mixed with water, alkali is released. Take precautions to avoid dry cemen

16、t 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

17、off the skin immediately. DIN EN 12350-4:2009-08 EN 12350-4:2009 (E) 4 The following amendments have been made to the 1999-04 edition of this standard: editorial revision correcting the minimum frequency of the vibrating table from 2400 cycles per second into 2400 cycles per minute. According to the

18、 CEN/CENELEC Internal Regulations, 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, Lithuani

19、a, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 12350-4:2009-08 EN 12350-4:2009 (E) 5 1 Scope This European standard specifies a method for determining the consistence of fresh concrete by determining

20、 the degree of compactability. It is not applicable to concrete of which the maximum size of aggregate exceeds 63 mm. If the degree of compactability is less than 1,04 or more than 1,46, the concrete has a consistence for which the degree of compactability test is not suitable. 2 Normative reference

21、s 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 amendments) applies. EN 12350-1, Testing fresh concrete Part 1: Samp

22、ling 3 Principle Carefully place the fresh concrete in a container using a trowel, avoiding any compaction the concrete. When the container is full, the top surface is struck off level with the top of the container. The concrete is compacted by vibration and the distance from the surface of the comp

23、acted concrete to the upper edge of the container is used to determine the degree of compactability. 4 Apparatus 4.1 Container, made of metal not readily attacked by cement paste. The internal dimensions of the container shall be: base: (200 2) mm (200 2) mm; height: (400 2) mm. The thickness of the

24、 base and walls shall be at least 1,5 mm. NOTE The bottom of the container may be perforated to facilitate emptying. A suitable plastic plate to cover the bottom has then to be placed inside the container. 4.2 Trowel, with a flat blade (see Figure 1). DIN EN 12350-4:2009-08 EN 12350-4:2009 (E) 6 Dim

25、ensions in millimetres Figure 1 Trowel 4.3 Means of compacting the concrete, which shall be one of the following: internal vibrator: with a minimum frequency of approximately 120 Hz (7 200 cycles per minute). The diameter of the internal vibrator shall not exceed one-quarter of the smallest dimensio

26、n of the container; vibrating table: with a minimum frequency of approximately 40 Hz (2 400 cycles per minute). The use of a vibrating table shall be the reference method. 4.4 Remixing container, flat tray of rigid construction and made from a non-absorbent material not readily attacked by cement pa

27、ste. It shall be of appropriate dimensions such that the concrete can be thoroughly re-mixed, using the square-mouthed shovel. 4.5 Shovel, with square mouth. NOTE The square mouth is required to ensure proper mixing of material on the remixing container. DIN EN 12350-4:2009-08 EN 12350-4:2009 (E) 7

28、4.6 Straight edged scraper, more than 200 mm in length 4.7 Rule, graduated from 0 mm to 300 mm, at intervals not exceeding 5 mm, the zero mark being at the extreme end of the rule. 4.8 Moist cloth. 5 Sampling The sample shall be obtained in accordance with EN 12350-1. The sample shall be re-mixed be

29、fore carrying out the test. NOTE Alternative sampling procedures may be given in national standards or provisions in the place of use of concrete. 6 Procedure Clean the container and moisten the inner surfaces using a damp cloth. Fill the container, without tamping it, by tilting the trowel sideways

30、 from each of all four upper edges of the container in turn. When the container is filled, remove all concrete above the upper edges, using the straight edged scraper with a sawing action, in such a way as to avoid any compacting effect. Compact the concrete by means of a vibrating table or by the u

31、se of an internal vibrator, until no further reduction in volume is determinable. During compaction avoid loss of concrete through splashing, or leakage. NOTE 1 Great care is recommended if loss of entrained air is to be avoided when using an internal vibrator. After compaction, determine the value

32、of s (see Figure 2), i.e.: the mean value of the distance between the surface of the compacted concrete and the upper edge of the container to the nearest millimetre. Obtain this value by measuring at the middle of each side of the container. NOTE 2 The consistence of a concrete mix changes with tim

33、e, due to hydration of the cement and, possibly, loss of moisture. Tests on different samples should, therefore, be carded out at a constant time interval after mixing, if strictly comparable results are to be obtained. 7 Expression of results The degree of compactability c is given by the formula:

34、shhc= where h is the internal height of the container, in millimetres; s is the mean value, to the nearest millimetre, of the four distances from the surface of the compacted concrete to the upper edges of the container. The result shall be reported to the nearest 0.01. DIN EN 12350-4:2009-08 EN 123

35、50-4:2009 (E) 8 8 Test report The report shall include: a) identification of the test sample; b) location of performance of test; c) date of test; d) method of compacting; e) determined degree of compactability, to two decimal places; f) any deviation from standard test method; g) declaration by the

36、 person technically responsible for the test that it was carried out in accordance with this document, except as noted in item e). The report may include: h) temperature of the concrete sample at time of test; i) time of test. 9 Precision There is currently no precision data for this test. Figure 2 Concrete in container, before and after compaction DIN EN 12350-4:2009-08