DIN EN 445-2008 Grout for prestressing tendons - Test methods English version of DIN EN 445 2008-01《预拉伸钢筋束用灌浆 试验方法》.pdf

1、January 2008DEUTSCHE NORM English price group 11No 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 91.100.10!$KcF“1406435

2、www.din.deDDIN EN 445Grout for prestressing tendons Test methodsEnglish version of DIN EN 445:2008-01Einpressmrtel fr Spannglieder PrfverfahrenEnglische Fassung DIN EN 445:2008-01SupersedesDIN EN 445:1996-07www.beuth.deDocument comprises 17 pagesDIN EN 445:2008-01 2 National foreword This standard h

3、as been prepared by Technical Committee CEN/TC 104 “Concrete and related products” (Secretariat: DIN, Germany), Subcommittee SC 2 “Execution of concrete structures”. The responsible German body involved in its preparation was the Normenausschuss Bauwesen (Building and Civil Engineering Standards Com

4、mittee), Technical Committee NA 005-07-26 Einpressmrtel fr Hllrohre. This standard supersedes DIN EN 445:1996-07. Amendments This standard differs from DIN EN 445:1996-07 as follows: a) The standard has been editorially revised. b) The fluidity test using the immersion devices has been dropped. c) T

5、he fluidity test now also includes the grout spread method (see subclause 4.3.2). d) Grout spread testing now also includes the inclined tube test (see subclause 4.4). e) Determination of the volume change of the grout is no longer specified as a separate test method but has been included in grout s

6、pread testing as the wick-induced test (see subclause 4.5). f) A method of determining the density of grout has been specified (see subclause 4.7). Previous editions DIN 4227-5: 1979-12 DIN EN 445: 1996-07 EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 445October 2007ICS 91.100.30 Supersedes EN 4

7、45:1996 English VersionGrout for prestressing tendons - Test methodsCoulis pour cble de prcontrainte - Mthode dessais Einpressmrtel fr Spannglieder - PrfverfahrenThis European Standard was approved by CEN on 21 June 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which

8、 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 obtained on application to the CEN Management Centre or to any CEN member.This European Standa

9、rd 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 standar

10、ds 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 United Kingdom

11、.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 445:2007: EEN 445:2007 (E)

12、 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 The testing of grout .5 4.1 General5 4.1.1 Personnel5 4.1.2 Test conditions 5 4.1.3 Test reports 5 4.2 Sieve test 6 4.2.1 Principle of test6 4.2.2 Apparatus .6 4.2.3 Procedure .6 4.2.4 Reportin

13、g 6 4.3 Fluidity test.6 4.3.1 Cone method6 4.3.2 Grout spread method 8 4.4 Inclined tube test .9 4.4.1 Principle of test9 4.4.2 Test equipment and set-up .10 4.4.3 Test procedure.10 4.4.4 Reporting of results.11 4.5 Wick-induced test 12 4.5.1 Principle of test12 4.5.2 Equipment 12 4.5.3 Procedure .1

14、2 4.5.4 Reporting of results.12 4.6 Compressive strength test .13 4.6.1 Principle of the test13 4.6.2 Apparatus .13 4.6.3 Test procedure.14 4.7 Density test.14 4.7.1 Principle of test14 4.7.2 Apparatus .14 4.7.3 Reporting of results.14 Bibliography 15 DIN EN 445:2008-01 EN 445:2007 (E) 3 Foreword Th

15、is European Standard (EN 445:2007) 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, either by publication of an identical text or by endorsement, at t

16、he latest by April 2008, and conflicting national standards shall be withdrawn at the latest by April 2008. This document supersedes EN 445:1996. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European St

17、andard: 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 United Kingdom. D

18、IN EN 445:2008-01 EN 445:2007 (E) 4 Introduction In post-tensioned prestressed concrete construction, the grouting of tendons is an important operation. The intention of this European Standard is to provide a specification for grouting, compliance with which will satisfy the requirements in prEN 136

19、70. The testing regimes anticipated by this European Standard include three levels: (1) Initial type and audit testing in accordance with EN 447; (2) Suitability testing for confirmation of the selected grout for a specific project in accordance with EN 446; (3) Inspection during the production of g

20、rout on a specific project in accordance with EN 446. The test methods for each of the regimes are given in this standard. Some tests given herein are alternatives and it will be necessary to relate the chosen test method to the specified requirements. The tests are reference tests for checking suit

21、ability of grout for use with any type of tensile steel element. System of CEN and EOTA documents as basis for design, execution and materials selection for protective measures of prestressing systems (only main modules). EN 1992 Eurocode 2:Design of concrete structures prEN 13670 Execution of concr

22、ete structures ETAG 013 Post-tensioning kits for prestressing of structuresEN 446 Grout for prestressing tendons Grouting procedures EN 447 Grout for prestressing tendons Basic requirements EN 445 Grout for prestressing tendons Test methods CEN Workshop Agreement CWA 14646 Requirements for the insta

23、llation of post-tensioning kits for prestressing of structures and qualification of specialist company and its personnel. DIN EN 445:2008-01 EN 445:2007 (E) 5 1 Scope This European Standard describes the test methods for grout specified in EN 447. Testing shall be performed in accordance with the te

24、st methods given in this standard (reference test methods). The test methods are applicable to grout for all types of structures including bridges and buildings. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, on

25、ly the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 196-1, Methods of testing cement Determination of strength EN 447, Grout for prestressing tendons Basic Requirements 3 Terms and definitions For the purposes of

26、this document, the following terms and definitions apply. 3.1 grout homogeneous mixture of cement and water, it may contain admixtures and additions 4 The testing of grout 4.1 General 4.1.1 Personnel The grouts shall be tested by competent personnel experienced in the subject. 4.1.2 Test conditions

27、Testing shall be carried out at specified temperatures. The grout for the tests shall be made from materials specified in EN 447 and mixed in accordance with EN 447. NOTE EN 446 requires suitability testing to be carried out using the same type of mixing equipment as is used for the actual site oper

28、ations, hence it is preferable to also use the same type of equipment for all testing. 4.1.3 Test reports All test reports shall include the following information as a minimum: a) reference to this European Standard; b) name and address of the testing laboratory; c) identification number of the test

29、 report; d) name and address of the organisation or person who ordered the test; DIN EN 445:2008-01 EN 445:2007 (E) 6 e) name and address of the manufacturer or supplier of the product(s); f) name or other identification mark of the product; g) date of fabrication, and if relevant, supply of the pro

30、duct; h) date of manufacture of test specimens; i) date of test; j) temperature of the fresh grout and ambient temperature; k) batching and mixing procedures used; l) specification of the grout mixer used; m) identification of test equipment used, including where appropriate, calibration details; n)

31、 individual results for the required test; o) any inaccuracies or uncertainty of test results; p) date and signature of the person responsible for the tests. 4.2 Sieve test 4.2.1 Principle of test The test consists of pouring a quantity of grout through a sieve to check for the absence of lumps on t

32、he sieve 4.2.2 Apparatus A 150 mm diameter sieve with an aperture 2 mm. 4.2.3 Procedure Pour a minimum of 1 l of freshly mixed grout through the sieve. NOTE This may be carried out while filling the fluidity test cone. 4.2.4 Reporting Report the absence of lumps on the sieve. 4.3 Fluidity test NOTE

33、Two test methods are described, only one is to be performed as appropriate for the type or characteristics of the grout. 4.3.1 Cone method 4.3.1.1 Principle of test The fluidity of grout, expressed in seconds, is measured by the time necessary for a stated quantity of grout (1 l) to pass through the

34、 orifice of the cone, under stated conditions. DIN EN 445:2008-01 EN 445:2007 (E) 7 4.3.1.2 Apparatus The following apparatus is required for the test: a) Cone of the dimensions given in Figure 1. The cone shall be of smooth non-absorbent material. The volume of the cone (excluding the cylindrical p

35、ortions at top and bottom) shall be (1,7 0,17) l. b) Stopwatch showing time to 0,1 s. c) Graduated cylinder of minimum 1 l capacity and with a diameter of approximately 60 mm. d) Thermometer. NOTE The cone in Figure 1 is available in plastic. 4.3.1.3 Test procedure 4.3.1.3.1 Preparation Mount the co

36、ne with its axis vertical and its largest diameter uppermost and support firmly in position. During the test prevent the cone from vibrating. Place the cylinder under the cone outlet. All surfaces of the cone shall be clean and shall be dampened so that the surfaces are moist but without free water.

37、 Close the lower cone orifice. 4.3.1.3.2 Procedure Pour the grout to fill the conical section of the cone. The grout shall be poured sufficiently slowly to prevent a build-up of air. Open the lower cone orifice and at the same time start the stopwatch. Measure the time taken to the nearest 0,5 s, fo

38、r 1 l of grout to run into the cylinder. The grout shall be kept agitated while waiting further testing if required. 4.3.1.4 Reporting of results Report the time measured. DIN EN 445:2008-01 EN 445:2007 (E) 8 Dimensions in millimetres Dimensions are internal Figure 1 Cone for fluidity test 4.3.2 Gro

39、ut spread method 4.3.2.1 Principle of test The grout spread test measures the fluidity of thixotropic grouts. The fluidity is measured by the diameter of the circle of grout spread on a smooth plate after a fixed period. 4.3.2.2 Apparatus The following apparatus is required for the test: a) Glass or

40、 polished steel plate with a minimum diameter of 300 mm. b) Stiff mould made of steel or plastic with an internal diameter of 39 mm and a height of 60 mm. c) Stopwatch showing time to 0,1 s. d) Thermometer. e) Ruler with a minimum length of 300 mm and a 1 mm graduation. DIN EN 445:2008-01 EN 445:200

41、7 (E) 9 4.3.2.3 Test procedure 4.3.2.3.1 Preparation The spread test is carried out on the horizontal plate. Ensure that the surfaces of the mould and plate are clean and slightly moistened. If necessary apply a thin film of petroleum jelly (e.g. Vaseline) to the brim of the mould in contact with th

42、e plate to prevent the mould from leaking during filling with grout. 4.3.2.3.2 Procedure Put the mould on the plate and prevent it from sliding. Pour the grout slowly into the mould until the level of the grout has reached the upper brim. The mould is steadily lifted from the plate and kept above th

43、e spread for a maximum of 30 s before it is taken away. The spread is measured in two perpendicular directions at 30 s after the start of lifting the mould. 4.3.2.4 Reporting of results Report the spread diameter as the average measured in the two perpendicular directions across the grout spread in

44、millimetres. Dimensions in millimetres Key 1 Cylinder (steel or plastic tube) 2 Smooth plate Figure 2 Grout spread test 4.4 Inclined tube test 4.4.1 Principle of test This test serves to determine the bleed properties and volume stability of grout at full scale and includes the filtering effect of s

45、trands. The test consists of measuring the quantity of water and air remaining on the surface of the grout which has been allowed to stand protected from evaporation. NOTE In a first test phase, the bleed water and air accumulated on top of a tube filled with grout should be determined. The grout is

46、 injected and is allowed to set so that water losses due to evaporation are prevented. In a second phase, the effect of re-grouting of a tube on bleed water and air accumulated can be determined. DIN EN 445:2008-01 EN 445:2007 (E) 10 4.4.2 Test equipment and set-up a) 2 transparent tubes, of approxi

47、mately 80 mm diameter and 5 m long, equipped with caps at each end including grout inlet at the lower end, and grout vent at the top. The tubes and caps shall be able to sustain the proposed grout pressure. b) 12 prestressing strands 15-16 mm per tube, i.e. a total of 24, length (approximately 5 m)

48、to just fit between the caps on the tubes. c) Thermometer. 4.4.3 Test procedure 4.4.3.1 General The two tubes are fixed on their supports to avoid noticeable deflections, at an inclination of (30 2) against a horizontal reference line. Twelve strands shall be installed in each tube. The caps are sub

49、sequently sealed on the tube ends, see Figure 3. The cap shall allow internal inspection for presence of any air or water. The grout is prepared in accordance with the grouting method statement. Specimens shall be taken from the grout mix to measure its fluidity. 4.4.3.2 Grouting of first tube (Tube 1) Grout is injected into Tube 1 from the bottom end. When the grout exits from the vent at the top with the same consistency as it enters at the bottom, the valve shall be closed. Subsequently, the grout inlet is closed, and grouting of T