1、BS EN 934-4:2009ICS 91.100.30NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDAdmixtures forconcrete, mortar andgroutPart 4: Admixtures for grout forprestressing tendons Definitions,requirements, conformity, markingand labellingThis British Standardwas published
2、under theauthority of the StandardsPolicy and StrategyCommittee on 30 June2009. BSI 2009ISBN 978 0 580 62628 9Amendments/corrigenda issued since publicationDate CommentsBS EN 934-4:2009National forewordThis British Standard is the UK implementation of EN 934-4:2009. Itsupersedes BS EN 934-4:2001 whi
3、ch is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/517/3, Admixtures.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Use
4、rs are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 934-4:2009EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 934-4May 2009ICS 91.100.30 Supersedes EN 934-4:2001 English VersionAdmixtures for concrete, mortar and grou
5、t - Part 4: Admixturesfor grout for prestressing tendons - Definitions, requirements,conformity, marking and labellingAdjuvants pour bton, mortier et coulis - Partie 4: Adjuvantspour coulis de cble de prcontrainte - Dfinitions,exigences, conformit, marquage et tiquetageZusatzmittel fr Beton, Mrtel u
6、nd Einpressmrtel - Teil 4:Zusatzmittel fr Einpressmrtel fr Spannglieder -Definitionen, Anforderungen, Konformitt, Kennzeichnungund BeschriftungThis European Standard was approved by CEN on 24 April 2009.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the con
7、ditions 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 Standard exists in three
8、 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 standards bodies of Austr
9、ia, 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.EUROPEAN COMMITTE
10、E 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 any means reservedworldwide for CEN national Members.Ref. No. EN 934-4:2009: EBS EN 934-4:2009EN 934-4:2009 (E)
11、 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .44 Composition and preparation of test mix .54.1 Constituent materials 54.2 Water/cement ratio.54.3 Fluidity 54.4 Mixing 55 Requirements .55.1 General 55.2 Specific .55.3 Release of dangerous substances .66 Sampling
12、 .67 Conformity control.68 Evaluation of conformity .79 Marking and labelling 79.1 General 79.2 Designation of admixtures 79.3 Additional Information 8Annex A (informative) Content and release of dangerous substances .9Annex B (normative) Bleed and Volume Change test 10B.1 Principle . 10B.2 Apparatu
13、s 10B.3 Procedure 10B.4 Reporting results 10B.4.1 Bleeding . 10B.4.2 Volume change . 11Annex ZA (informative) Provisions for the CE marking of admixtures for concrete under the EU Construction Products Directive . 12ZA.1 Clauses of this European Standard addressing the provisions of the EU Construct
14、ion Products Directive 12ZA.2 Procedure for attestation of conformity of admixtures for grout for prestressing tendons 14ZA.2.1 System of attestation of conformity . 14ZA.2.2 EC certification and declaration of conformity 15ZA.3 CE marking and labelling . 16Bibliography . 19BS EN 934-4:2009EN 934-4:
15、2009 (E) 3 Foreword This document (EN 934-4:2009) 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 status of a national standard, either by publication of an identical text or by en
16、dorsement, at the latest by November 2009, and conflicting national standards shall be withdrawn at the latest by November 2009. This document supersedes EN 934-4:2001. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, an
17、d supports essential requirements of EC Directive(s). For relationship with EC Directive(s), see informative Annex ZA, which is an integral part of this document. This standard is a part of the series EN 934 “Admixtures for concrete, mortar and grout“ which additionally comprises the following parts
18、 Part 1: Common requirements Part 2: Concrete admixtures Definitions, requirements, conformity, marking and labelling Part 3: Admixtures for masonry mortar Definitions, requirements, conformity, marking and labelling Part 5: Admixtures for sprayed concrete Definitions, requirements, conformity, mark
19、ing and labelling Part 6: Sampling, conformity control and evaluation of conformity This European Standard is used with the standards of the EN 480 series which comprises test methods for admixtures. The annexes A and ZA are informative. According to the CEN/CENELEC Internal Regulations, the nationa
20、l 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, Netherlands, Norway, Pol
21、and, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. BS EN 934-4:2009EN 934-4:2009 (E) 4 1 Scope This European Standard defines and specifies requirements and conformity criteria for admixtures for the use in grouts for prestressing tendons according to EN 447.
22、It covers admixtures for use in site1)mixed grout only. Provisions for the use of grout admixtures are not part of this standard but are covered by EN 447. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the
23、 edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 196-2, Methods of testing cement Part 2: Chemical analysis of cement EN 196-6, Methods of testing cement Determination of fineness EN 197-1, Cement Part 1: Composition
24、, specifications and conformity criteria for common cements EN 445, Grout for prestressing tendons Test methods EN 934-1:2008, Admixtures for concrete, mortar and grout Part 1: Common requirements EN 934-6:2001, Admixtures for concrete, mortar and grout Part 6: Sampling, conformity control and evalu
25、ation of conformity EN 1008, Mixing water for concrete Specification for sampling, testing and assessing the suitability of water, including water recovered from processes in the concrete industry, as mixing water for concrete 3 Terms and definitions For the purposes of this document, the terms and
26、definitions in EN 934-1:2008 and the following apply. 3.1 admixture for grout material which improves the characteristics of grouts to be injected into ducts for prestressing tendons by influencing their properties such as fluidity, expansion, volume change and bleeding, individually or in combinati
27、on 3.2 expanding grout admixture admixture for use in grout which is intended to ensure that the initial volume of the liquid grout has not reduced after hardening 3.3 compliance dosage dosage of an admixture, quoted by the manufacturer in % by mass of cement, which will meet the requirements of thi
28、s standard and which is within the recommended range of dosage 1) For this standard site includes precast concrete factories. BS EN 934-4:2009EN 934-4:2009 (E) 5 3.4 recommended range of dosage dosages between limits, which the manufacturer recommends for the product and are expressed in % by mass o
29、f cement, based on experience on site NOTE The use of the recommended dosage does not imply that compliance with this standard will be met over the whole range. Trial tests should be carried out with the materials to be used on site to find the dosage necessary to achieve the required result (see EN
30、 446). 3.5 test mix prescribed mix of cement, water and admixture 4 Composition and preparation of test mix 4.1 Constituent materials a) Cement type CEM I strength classes 42,5 and 52,5 complying with EN 197-1, C3A content 7 % to 11 % by mass calculated from chemical analysis in accordance with EN 1
31、96-2 and a specific surface of 320 m2/kg to 400 m2/kg determined in accordance with EN 196-6. b) Water in accordance with EN 1008. c) Admixture for grout under test used at its compliance dosage. 4.2 Water/cement ratio This shall be adjusted to provide the fluidity in 4.3 and shall not exceed 0,42.
32、4.3 Fluidity The fluidity, measured by cone method in accordance with EN 445, at (20 2) C, immediately after mixing shall be (15 3) s 4.4 Mixing This shall be carried out mechanically, with a high shear mixer, to obtain a homogeneous grout. Any recommendations from the manufacturer of the admixture,
33、 regarding the mixing sequence, shall be followed. 5 Requirements 5.1 General Admixtures for grout shall comply with Table 1 and EN 934-1:2008, Table 1, Line 1 to 8 and 10. NOTE For requirements which lead to the CE-marking, see ZA.1 5.2 Specific Test mixes shall comply with Table 1. BS EN 934-4:200
34、9EN 934-4:2009 (E) 6 Table 1 Requirements for grout admixtures No Property Test method Requirements 1 Fluidity 30 min after mixingaEN 445 Cone method 25 s 2 Compressive strengthaEN 445 30 MPa at 28 days 3 Bleeding Annex B 2 % of initial volume at 3 h 4 Range of volume change at 24 h Annex B -1 % S 5
35、 % 0 S 5 %, when testing expanding admixtures, where S is the volume change aThese requirements correspond with EN 447. 5.3 Release of dangerous substances For content and release of substances from the hardened grout dangerous to health, hygiene and the environment see Annex A (informative). 6 Samp
36、ling Requirements for sampling are given in EN 934-6:2001 7 Conformity control Requirements for conformity control are given in EN 934-6:2001. The frequency of testing in connection with factory production control is given in Table 2. BS EN 934-4:2009EN 934-4:2009 (E) 7 Table 2 Minimum frequency of
37、test for factory production control of admixtures for grout for prestressing tendons Tests Frequency Homogenity, colour B Relative density (for liquids only) B Conventional dry material content B pH value (for liquids only) B Chloride content (Cl)a4 Compressive strength 1 Fluidity A Bleeding A Volum
38、e change A Numbers in this table denote minimum frequency of test per year, spread according to production; if the production is less frequent every batch has to be tested. A: means test for every 500 t with a minimum of 2 times a year B: means test for each batch aTotal chlorine content also has to
39、 be tested at this frequency if it is significantly different from the water soluble chloride content. NOTE Effective component (infra red analysis) need not be included in the programme of factory production control. They shall be included in initial type testing. 8 Evaluation of conformity Require
40、ments for evaluation of conformity are given in EN 934-6:2001. 9 Marking and labelling 9.1 General When admixtures for grout are supplied in containers they shall be clearly marked with the relevant information. When the material is supplied into a bulk container at the point of delivery, the same i
41、nformation shall be provided in writing at the time of delivery. NOTE For CE-marking and labelling see ZA.3. 9.2 Designation of admixtures Admixtures for concrete shall be designated by: a) Name of type of admixture in the language of one member country, b) Number of standard: EN 934-4:2009, c) Type
42、 of admixture (i.e. admixture for grout or expanding admixture for grout; EN 934-4 EXAMPLE Admixture for grout or expanding admixture for grout; EN 934-4: BS EN 934-4:2009EN 934-4:2009 (E) 8 9.3 Additional Information a) batch number and production plant; b) summary of storage requirements including
43、 any special requirements on storage life which shall be clearly marked, e. g.: This admixture shall not be taken to comply with EN 934-4:2009 after “date“; c) instructions for homogenisation, before use, when necessary; d) instructions for use and any necessary safety precautions, e. g. if caustic,
44、 toxic or corrosive; e) manufacturers recommended range of dosage. BS EN 934-4:2009EN 934-4:2009 (E) 9 Annex A (informative) Content and release of dangerous substances In the absence of specific requirements for substances dangerous to health, hygiene and environment in this standard, the requireme
45、nts of ZA.1 (paragraph “Warning“) and ZA.3 apply. BS EN 934-4:2009EN 934-4:2009 (E) 10 Annex B (normative) Bleed and Volume Change test B.1 Principle The test measures the bleeding and volume change, as a percentage, of the initial volume of the grout between the start and end of the test. The bleed
46、ing is assessed at 3 h and the volume change at 24 h resulting from segregation or expansion of the grout. B.2 Apparatus A transparent cylinder of (50 1) mm internal diameter and approximately 200 mm in height. B.3 Procedure Support the cylinder vertically on a surface that is free from shocks or vi
47、bration. Fill it carefully to a height of (180 5) mm keeping clean the internal surface of the transparent cylinder above the grout meniscus. Measure the height h of the grout column accurately. Place a loose cover on the top of the tube to prevent evaporation. After 3 h, measure the height of any b
48、leed water on the top of the grout as h1. After 24 h re-measure the total height of the grout column as h2. B.4 Reporting results B.4.1 Bleeding The bleeding after the 3 h period is given by %1001hhwhere h the initial height of the grout column in mm h1the height of the water on top of the grout aft
49、er 3 h in mm BS EN 934-4:2009EN 934-4:2009 (E) 11 B.4.2 Volume change The volume change after the 24 h period is given by %100)(2hhhwhere h the initial height of the grout column in mm h2the height of the grout column after 24 h in mm BS EN 934-4:2009EN 934-4:2009 (E) 12 Annex ZA (informative) Provisions for the CE marking of admixtures for concrete under the EU Construction Products Directive ZA.1 Clauses of this European Standard addressing the pr
