1、December 2010 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).IC
2、S 91.100.30!$ld9“1736522www.din.deDDIN EN 12350-8Testing fresh concrete Part 8: Self-compacting concrete Slump-flow testEnglish translation of DIN EN 12350-8:2010-12Prfung von Frischbeton Teil 8: Selbstverdichtender Beton SetzflieversuchEnglische bersetzung von DIN EN 12350-8:2010-12Essai pour bton
3、frais Partie 8: Bton auto-plaant Essai dtalement au cne dAbramsTraduction anglaise de DIN EN 12350-8:2010-12www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.1112.10 DIN EN 12350-8:2010-12 A comma is used as a decimal marker. Nationa
4、l foreword 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), Working Committee N
5、A 005-07-05 AA Prfverfahren fr Beton. The DIN Standard corresponding to the International Standard referred to in this document is as follows: ISO 5725-2 DIN ISO 5725-2 National Annex NA (informative) Bibliography DIN ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results P
6、art 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12350-8 July 2010 ICS 91.100.30 English Version Testing fresh concrete - Part 8: Self-compacting concrete - Slump-flow test Essai pou
7、r bton frais - Partie 8: Bton auto-plaant - Essaidtalement au cne dAbrams PrfungvonFrischbeton- Teil8:SelbstverdichtenderBeton-SetzflieversuchThis 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 cond
8、itions 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 thr
9、ee official 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
10、Austria, 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.
11、EUROPEAN 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 12350-8:2010: EEN 12350-
12、8:2010 (E) 2 Contents Page Foreword 31 Scope 52 Normative references 53 Principle 54 Apparatus .55 Test sample 66 Procedure .77 Test result .78 Test report 79 Repeatability and reproducibility .8Bibliography 9DIN EN 12350-8:2010-12 EN 12350-8:2010 (E) 3 Foreword This document (EN 12350-8:2010) has b
13、een 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, either by publication of an identical text or by endorsement, at the latest by January 2011, and conflicti
14、ng national 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
15、has been 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-200
16、1-00580). 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 satisf
17、actory in-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
18、to segregation. 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 evalua
19、ted in the 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 three key properties. Nevertheless any test method should at least be correlat
20、ed to 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-
21、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 DIN EN 12350-8:2010-12 EN 12350-8:2010 (E) 4 Part 9: Self-compacting concrete V-funnel test Part 10: Self-compacting c
22、oncrete L 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 w
23、ith 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 off the skin immediately. According to the CEN/CENELEC Internal Regulations, the n
24、ational standards 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, Netherlan
25、ds, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 12350-8:2010-12 EN 12350-8:2010 (E) 5 1 Scope This European Standard specifies the procedure for determining the slump-flow and t500time for self-compacting concrete. The test is not
26、suitable when the maximum size of the aggregate exceeds 40 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
27、 (including any amendments) applies. EN 12350-1, Testing fresh concrete Part 1: Sampling EN 12350-2, Testing fresh concrete Part 2: Slump-test 3 Principle The slump-flow and t500time is used to assess the flowability and the flow rate of self-compacting concrete in the absence of obstructions. It is
28、 based on the slump test described in EN 12350-2. The result is an indication of the filling ability of self-compacting concrete. The t500time is a measure of the speed of flow and an indication of the relative viscosity of the self-compacting concrete. The fresh concrete is poured into a cone as us
29、ed for the EN 12350-2 slump test. When the cone is withdrawn upwards the time from commencing upward movement of the cone to when the concrete has flowed to a diameter of 500 mm is measured; this is the t500time. The largest diameter of the flow spread of the concrete and the diameter of the spread
30、at right angles to it are then measured and the mean is the slump-flow. Measurement of the t500time may be omitted if not requested. 4 Apparatus The apparatus shall be in accordance with EN 12350-2 except as detailed below. 4.1 Baseplate, made from a flat steel plate, which shall be the reference ma
31、terial, with a plan area of at least 900 mm 900 mm on which concrete can be placed. The plate shall have a flat, smooth surface. If the plate is made from other materials, in-use performance test data shall be available which demonstrates long-term equivalence with steel plate. The surface shall not
32、 be readily attacked by cement paste or be liable to rusting. The construction of the plate shall be such as to prevent distortion. The deviation from flatness shall not exceed 3 mm at any point when a straight edge is placed between opposing sides and corners. The centre of the plate shall be scrib
33、ed with a cross, the lines of which run parallel to the edges of the plate and with circles of (210 1) mm diameter and (500 1) mm diameter having their centres coincident with the centre point of the plate. See Figure 1. All lines to be a maximum of 2,0 mm wide and 1,0 mm deep. 4.2 Rule or measuring
34、 tape, of minimum length 1 000 mm and having sub-divisions not greater than 5 mm along its entire length. 4.3 Stop watch, capable of measuring to 0,1 s. 4.4 Spirit level, for checking horizontality of base plate prior to commencing the test. DIN EN 12350-8:2010-12 EN 12350-8:2010 (E) 6 4.5 Container
35、, to hold the test sample and having a volume of at least 10 l. 4.6 Collar (optional), having a mass of at least 9 kg (see Figure 2). NOTE The collar allows the test to be carried out by one person. Dimensions in millimetres Figure 1 Baseplate Dimensions in millimetres Figure 2 Example of dimensions
36、 of a steelweighted collar 5 Test sample The sample shall be obtained in accordance with EN 12350-1. DIN EN 12350-8:2010-12 EN 12350-8:2010 (E) 7 6 Procedure Place the baseplate on a flat and horizontal surface free from external vibration or shock. Check the top surface for horizontality using the
37、spirit level. Clean the table and the cone and dampen immediately prior to testing, but keep free from excess moisture. Fit the collar to the cone if being used. Place the cone centrally within the 210 mm circle on the baseplate and hold in position by standing on the foot pieces (or use the collar)
38、, ensuring that no concrete can leak from under the cone. Fill the cone in one operation without any agitation or mechanical compaction, and strike off surplus from the top of the cone. Allow the filled cone to stand for not more than 30 s; during this time remove any spilled concrete from the basep
39、late. Lift the cone vertically in 1 s to 3 s in one movement without interfering with the flow of concrete. If the t500time has been requested, start the stop watch immediately the cone ceases to be in contact with the baseplate and record the time taken to the nearest 0,1 s for the concrete to firs
40、t touch the 500 mm circle After the flow of concrete has stabilized without disturbing the baseplate or concrete, measure the largest diameter of the flow spread and record as d1 to the nearest 10 mm. Then measure the diameter of the flow spread at right angles to d1to the nearest 10 mm and record a
41、s d2to the nearest 10 mm. If the difference between d1and d2is greater than 50 mm another sample shall be taken and the procedure repeated. If two consecutive tests show the difference between d1and d2to be greater than 50 mm, the concrete lacks the necessary flowability for the slump-flow test to b
42、e suitable. Check the concrete spread for signs of segregation and report under item 8, f) in a qualitative way, e.g. no indication of segregation, strong indication of segregation. NOTE Signs of segregation include a ring of cement paste/mortar and segregated coarse aggregate in the central area. 7
43、 Test result The slump-flow SF is the mean of d1and d2, expressed to the nearest 10 mm, given by the following equation. 2)(21ddSF+= where SF is the slump-flow, in millimetres; d1is the largest diameter of flow spread, in millimetres; d2is the flow spread at 90 to d1, in millimetres. The t500time is
44、 reported to the nearest 0,5 s. 8 Test report The test report shall include: a) identification of the test sample; DIN EN 12350-8:2010-12 EN 12350-8:2010 (E) 8 b) location where the test was performed; c) date and time of test; d) slump-flow, SF, to the nearest 10 mm; e) t500time, to the nearest 0,5
45、 s (when requested); f) any indication of segregation of the concrete; g) any deviation from the standard test method; h) declaration by the person technically responsible for the test that it was carried out in accordance with this standard, except as noted in item g). The report may include: i) te
46、mperature of the concrete at the time of test; j) age of concrete at time of test (if known). 9 Repeatability and reproducibility The repeatability r and reproducibility R have been determined by a programme including eight laboratories, 16 operators and two replicates, and interpreted in accordance
47、 with ISO 5725-2. The resulting values for r and R are given in Tables 1 and 2. Table 1 Repeatability and reproducibility for typical values of Slump-flow Slump-flow SF in millimetres 750 Repeatability r in millimetres n/a 42 22 Reproducibility R in millimetres n/a 43 28Table 2 Repeatability and rep
48、roducibility for typical values of t500times t500time in seconds 6,0 Repeatability r in seconds 0,66 1,18 n/a Reproducibility R in seconds 0,88 1,18 n/aDIN EN 12350-8:2010-12 EN 12350-8:2010 (E) 9 Bibliography 1 ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method DIN EN 12350-8:2010-12
