1、March 2011 Translation by DIN-Sprachendienst.English price group 8No part of this translation 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 9
2、1.100.30!$n9W“1752252www.din.deDDIN EN 12350-6Testing fresh concrete Part 6: DensityEnglish translation of DIN EN 12350-6:2011-03Prfung von Frischbeton Teil 6: FrischbetonrohdichteEnglische bersetzung von DIN EN 12350-6:2011-03Essai pour bton frais Partie 6: Masse volumiqueTraduction anglaise de DIN
3、 EN 12350-6:2011-03SupersedesDIN EN 12350-6:2009-08www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 12 pages03.11 DIN EN 12350-6:2011-03 A comma is used as the decimal marker. National foreword This standard has been prepared by Technica
4、l 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), Working Committee NA 005-07-05 AA Prfverfahren fr Beton. Amendments This
5、standard differs from DIN EN 12350-6:2000-03 as follows: a) the standard has been editorially revised; b) the description of the compaction process has been given in more detail; c) the precision data of balance, scales and other testing equipment have been modified. Compared with DIN EN 12350-6:200
6、9-08 (German version only), the following correction has been made: d) the date of issue in the running title has been corrected. Previous editions DIN 1048: 1925-09, 1932-04, 1937-10, 1943x DIN 1048-1: 1972-01, 1978-12, 1991-06 DIN 1048-3: 1975-01 DIN EN 12350-6: 2000-03, 2009-08 2 EUROPEAN STANDAR
7、DNORME EUROPENNEEUROPISCHE NORMEN 12350-6April 2009ICS 91.100.30 Supersedes EN 12350-6:1999 English VersionTesting fresh concrete - Part 6: DensityEssai pour bton frais - Partie 6: Masse volumique Prfung von Frischbeton - Teil 6: FrischbetonrohdichteThis European Standard was approved by CEN on 20 J
8、anuary 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 bibliographical references concerning such nationalstandards may be obt
9、ained 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 CEN member into its own language and notified to the CEN Managem
10、ent 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, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
11、Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by an
12、y means reservedworldwide for CEN national Members.Ref. No. EN 12350-6:2009: EEN 12350-6:2009 (E) 2 Contents Page Foreword 3 1 Scope 52 Normative references 53 Principle 54 Apparatus .55 Sampling .66 Procedure .67 Calculation of density .88 Test report 89 Precision .8Annex A (normative) Calibration
13、of container . 10DIN EN 12350-6:2011-03 EN 12350-6:2009 (E) 3 Foreword This document (EN 12350-6:2009) 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 status of a national standard
14、, either by publication of an identical text or by endorsement, at the latest by October 2009, and conflicting national standards shall be withdrawn at the latest by October 2009. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CE
15、N and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12350-6:1999. The results of a recent laboratory inter-comparison, part-funded by the EC under the Measurement and Testing programme, contract MAT1-CT94-0043mtp, have been taken
16、into account. The compaction of specimens using hand tamping, vibrating table, or internal (poker) vibrator are accepted as equivalent. However, the use of an internal vibrator to compact specimens containing entrained air should be carried out with caution. A procedure for calibrating the container
17、 has been included as a normative Annex A. This series EN 12350 includes the following parts. EN 12350 Testing fresh concrete 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; Par
18、t 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-compacting
19、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 cement or
20、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 12350-6:2011-03 EN 12350-6:2009 (E) 4 The following amendments have been made to the 1999-10 edition of this standard: editorial r
21、evision detailing of compaction process accuracy of balance, scales and other testing equipment. 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, Cyprus, Czech
22、 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. DIN EN 12350-6:2011-03 EN 12350-6:2009 (E) 5 1
23、 Scope This European standard specifies a method for determining the density of compacted fresh concrete both in the laboratory and in the field. NOTE It may not be applicable to very stiff concrete which cannot be compacted by normal vibration. 2 Normative references The following referenced docume
24、nts 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: Sampling 3 Principle Fresh concrete i
25、s compacted into a rigid and watertight container of known volume and mass and is then weighed. 4 Apparatus 4.1 Container, watertight, of sufficient rigidity to retain its shape, made of metal not readily attacked by cement paste, having a smooth internal face, with the rim machined to a plane surfa
26、ce. The rim and base shall be parallel. The smallest dimension of the container shall be at least four times the maximum nominal size of the coarse aggregate in the concrete, but shall be not less than 150 mm. The volume of the container shall be not less than 5 l. 4.2 Filling frame, filling may be
27、simplified by using a filling frame fitted tightly to the container 4.3 Means of compacting the concrete, which may be one of the following: a) internal (poker) vibrator with a minimum frequency of approximately 120 Hz (7 200 cycles per minute), the diameter of the internal vibrator not exceeding ap
28、proximately one-quarter of the smallest dimension of the container; b) vibrating table with a minimum frequency of approximately 40 Hz (2 400 cycles per minute); c) compacting rod of circular cross-section, straight, made of steel, having a diameter of approximately 16 mm, length of approximately 60
29、0 mm and with rounded ends; d) compacting bar, straight, made of steel having a square cross-section of approximately 25 mm 25 mm and length of approximately 380 mm. DIN EN 12350-6:2011-03 EN 12350-6:2009 (E) 6 4.4 Balance or scales, capable of determining the mass of the compacted concrete to an ac
30、curacy of 0,01 kg 4.5 Straight-edged scraper, made of steel, not less than 100 mm greater in length than the maximum internal dimension of the top of the container 4.6 Scoop, of approximately 100 mm width 4.7 Steel trowel or float 4.8 Remixing container, flat tray of rigid construction and made from
31、 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 shovel. 4.9 Shovel, with square mouth NOTE The square mouth is required to ensure proper mixing of material on the remixi
32、ng container. 4.10 Mallet, soft faced 5 Sampling The sample shall be obtained in accordance with EN 12350-1. The sample shall be re-mixed using the remixing container and the square mouthed shovel or equivalent remixing procedure specified in the national annex NA before carrying out the test. 6 Pro
33、cedure 6.1 Calibration Calibrate the container in accordance with Annex A, to obtain the volume of the container (V). 6.2 Mass of container Weigh the container to determine its mass (m1) and record the value indicated. 6.3 Filling the container Depending on the consistence of the concrete and the me
34、thod of compaction, the container shall be filled in two or more layers to achieve full compaction, except in the case of self-compacting concrete for which the container shall be filled in one operation. If a filling frame is used, the amount of concrete used to fill the mould shall be such that a
35、layer of concrete remains in the filling frame after compaction. The thickness of this layer shall be 10 % to 20 % of the height of the container. DIN EN 12350-6:2011-03 EN 12350-6:2009 (E) 7 6.4 Compacting the concrete 6.4.1 General The concrete shall be compacted immediately after placing in the m
36、oulds in such a way as to produce full compaction of the concrete with neither excessive segregation nor laitance. Each layer shall be compacted by using one of the methods described in 6.4.2 or 6.4.3. In the case of self-compacting concrete, no mechanical or hand compaction shall be applied during
37、filling or after the container is filled. NOTE 1 Full compaction is achieved using mechanical vibration, when there is no further appearance of large air bubbles on the surface of the concrete and the surface becomes relatively smooth with a glazed appearance, without excessive segregation. NOTE 2 F
38、urther guidance on methods of compaction for concretes having different consistencies or cast in different sizes of containers, may be given in national annex NA. 6.4.2 Mechanical compaction 6.4.2.1 Compacting with internal vibrator Apply the vibration for the minimum duration necessary to achieve f
39、ull compaction of the concrete. Avoid over-vibration, which may cause loss of entrained air. NOTE Care should be taken not to damage the container. The use of a filling frame is recommended. Ensure that the vibrator is kept vertical and not allowed to touch the bottom or sides of the container. Labo
40、ratory tests have shown that great care is needed if loss of entrained air is to be avoided, when using an internal vibrator. 6.4.2.2 Compacting with vibrating table Apply the vibration for the minimum duration necessary to achieve full compaction of the concrete. The container should preferably be
41、attached to, or firmly held against the table. Avoid over-vibration, which may cause loss of entrained air. 6.4.3 Compacting by hand with compacting rod or bar Distribute the strokes of the compacting rod, or bar, in a uniform manner over the cross-section of the container. Ensure that the compactin
42、g rod, or bar, does not forcibly strike the bottom of the container when compacting the first layer, nor penetrate significantly any previous layer. Subject the concrete to a sufficient number of strokes per layer, typically 25 for concretes having a consistence equivalent to slump classes S1 and S2
43、, in order to remove pockets of entrapped air but not the entrained air. After compaction of each layer, tap the sides of the container smartly with the mallet until large bubbles of air cease to appear on the surface and depressions left by the compacting rod or bar, are removed. 6.5 Surface levell
44、ing If a filling frame is used, remove it immediately after compaction. After the top layer has been compacted, smooth it level with the top of the container, using the steel float or trowel. Skim the surface and rim with the straightedge and wipe the outside of the container clean. 6.6 Weighing Wei
45、gh the container with its contents to determine its mass (m2) and record the value indicated. DIN EN 12350-6:2011-03 EN 12350-6:2009 (E) 8 7 Calculation of density The density is calculated from the formula: 21mmDV= where D is the density of the fresh concrete, in kg/m; m1is the mass of the empty co
46、ntainer, in kg; m2is the mass of the container completely filled with compacted concrete, in kg; V is the volume of the container, in m. Express the density of the fresh concrete to the nearest 10 kg/m3. 8 Test report The report shall include: a) identification of the test sample; b) location of per
47、formance of test; c) date of test; d) method of compaction; e) calculated density of the fresh concrete, in kg/m; f) any deviation from standard test method; g) declaration by the person technically responsible for the test that it was carried out in accordance with this document, except as noted it
48、em f). The report may include: h) temperature of the concrete sample at time of test; i) time of test; j) consistence of the concrete. 9 Precision Precision data are given in Table 1. These apply to density measurements made on concrete taken from the same sample and compacted by hand using a compacting bar when each test result represents a single density determination. DIN EN 12350-6:2011-03 EN 12350-6:2009 (E) 9 Table 1 Precision data for density of fresh concrete measurements Range Repeata
