EN 1008-2002 en Mixing Water for Concrete - Specification for Sampling Testing and Assessing the Suitability of Water Including Water Recovered from Processes in the Concrete Indus.pdf

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1、BRITISH STANDARD BS EN 1008:2002 Mixing water for concrete Specirication ror sampling, testing and assessing the suitability of water, including water recovered from processes in the concrete industry, as mixing water tor concrete The European Standard EN 1008:2002 has the status of a British Standa

2、rd ICs 91.100.30 British Standards NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 1008:2002 National foreword This British Standard is the official English language version ofEN 1008:2002. It supersedes BS 3148:1980 which will be withdrawn on O1 December 2003. The UKpar

3、ticipation in its preparation was entrusted by Technical Committee B/5 17, Concrete, to Subcommittee B/517/1, Concrete production and testing, which has the responsibility to: This British Standard, having been prepared under the direction of the Building and Civil Engineering Sector Policy and Stra

4、tegy Committee, was published under the authority of the Standards Policy and Strategy Committee on 24 July 2002 - - aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interes

5、ts informed; monitor related international and European developments and promulgate them in the UK. - A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications re

6、ferred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search”faci1ity ofthe BSI Electronic Catalogue or ofBritish Stan dards Online. This publication does not purport to include all the necessary provi

7、sions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not ofitself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 18, an inside back cover a

8、nd a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd.No. I Date I Comments OBSI 24 July 2002 ISBN O 580 40141 3 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1008 June 2002 ICs 91.100.30 English

9、 version 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 con Crete Eau de gchage pour btons - Spcifications dchantillonnage, dessais et dvaluation de laptitu

10、de lemploi, y compris les eaux des processus de lindustrie du bton, telle que leau de gchage pour bton Zugabewasser von Beton - Festlegungen fr die Probenahme, Prfung und Beurteilung der Eignung von Wasser, einschlielich bei der Betonherstellung anfallendem Wasser, als Zugabewasser fr Beton This Eur

11、opean Standard was approved by CEN on 4 March 2002. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references conc

12、erning such national standards may be obtained on application to the 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 translation under the responsibility of a CEN member into its own l

13、anguage and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,

14、Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FR NORMUNG COMIT EUROPEN DE NORMALISATION Management Centre: rue de Stassart, 36 B-1050 Brussels O 2002 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national M

15、embers. Ref. No. EN 1008:2002 E EN 1008:2002 (E) Contents page Foreword 3 Introduction . 4 1 2 3 3.1 3.2 3.3 3.4 3.5 3.6 4 4.1 4.2 4.3 4.4 5 6 6.1 6.2 6.3 7 Scope 4 Normative references 4 Classification of types of water 5 Potable water 5 Water recovered from processes in the concrete industry . 5 W

16、ater from underground sources 5 Natural surface water and industrial waste water 5 Sea water or brackish water . 5 Sewage water . 5 Requirements . 5 General 5 Preliminary assessment 5 Chemical properties 6 Setting time and strength 7 Sampling . 7 Testing 8 Test methods 8 Frequency for testing 9 Conf

17、ormity evaluation . 9 Report 9 Annex A (normative) Requirements for the use of water recovered from processes in the concrete A . 1 A.2 A.2.1 A.2.2 A.2.3 A.2.4 A.3 A.4 A.4.1 A.4.2 A.4.3 A.4.4 A . 5 A51 A52 industry . IO Scope 10 Terms and definitions 10 Water recovered from processes in the concrete

18、 industry . IO Combined water . 10 Surplus concrete and mortar IO Recovered aggregates II Limitations on the use of water recovered from processes in the concrete industry 11 Requirements . 11 General 11 Storage 11 Distribution of solid material in the water . 11 The mass of solid material present i

19、n the recovered water 11 Inspection . 12 Density 12 Suitability 13 Annex B (informative) Testing scheme for mixing water for concrete 14 Annex C (informative) Recommended test methods . 17 Bibliography 18 2 EN 1008:2002 (E) Foreword This document EN 1008:2002 has been prepared by Technical Committee

20、 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 December 2002, and conflicting national standards shall be wit

21、hdrawn at the latest by December 2002. This standard has been prepared by CEN/TC 104-WG 5 ,Mixing water for concrete“. Annex A is normative. The annexes B and C are informative. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are boun

22、d to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. 3 EN 1008:2002 (E) Introduction The quality of the mixing

23、water for production of concrete can influence the setting time, the strength development of concrete and the protection of the reinforcement against corrosion. When assessing the suitability of water of unknown quality for the production of concrete, both the composition of the water and the applic

24、ation of the concrete to be produced should be considered. 1 Scope This European Standard specifies the requirements for water that is suitable for making concrete that conforms to EN 206-1 and describes methods for assessing its suitability. 2 Normative references This European Standard incorporate

25、s by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European

26、Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 196-1, Methods of testing cement - Part I: Determination of strength. EN 196-2, Methods of testing cement - Part 2: Chemical ana

27、lysis of cement. EN 196-3, Methods of testing cement - Part 3: Determination of setting time and soundness. EN 196-21, Methods of testing cement - Part 21: Determination of the chloride, carbon dioxide and alkali content of cement. EN 206-1 :2000, Concrete - Part I: Specification, performance, produ

28、ction and conformity. EN 12390-2, Testing hardened concrete - Part 2: Making and curing specimens for strength tests. EN 12390-3, Testing hardened concrete - Part 3: Compressive strength of test specimens. EN IS0 9963-2, Water quality - Determination of alkalinity - Part 2: Determination of carbonat

29、e alkalinity (IS0 9963-2: 1994). IS0 431 6, Surface active agents - Determination of pH of aqueous solutions - Potentiometric method. IS0 7890-1 , Water quality - Determination of nitrate - Part I: 2,6-Dimethylphenol spectrometric method. 4 EN 1008:2002 (E) 3 Classification of types of water In gene

30、ral the suitability of water for the production of concrete depends upon its origin. The following types may be distinguished: 3.1 Potable water This water is considered as suitable for use in concrete. Such water needs no testing. 3.2 Water recovered from processes in the concrete industry (This wa

31、ter, defined in A.2.1, will normally be suitable for use in concrete, but shall conform to the requirements of annex A. 3.3 Water from underground sources This water may be suitable for use in concrete, but shall be tested. 3.4 Natural surface water and industrial waste water This water may be suita

32、ble for use in concrete, but shall be tested. 3.5 Sea water or brackish water This water may be used for concrete without reinforcement or other embedded metal, but is in general not suitable for the production of reinforced or prestressed concrete. For concrete with steel reinforcement, or embedded

33、 metal, the permitted total chloride content in the concrete is the determining factor. 3.6 Sewage water This water is not suitable for use in concrete. 4 Requirements 4.1 General Water for use in concrete shall conform to the requirements of 4.2, 4.3.1, 4.3.2 and 4.3.3. The water shall also conform

34、 to either the chemical requirements in 4.3.4, or the requirements for setting time and compressive strength in 4.4. Water supplied as potable water is deemed to conform to the requirements in this standard. When waters are to be combined (see A.2.2), the requirements apply to the combined water NOT

35、E in concrete. Water conforming to the European Directive 98/83/EC is potable water and therefore considered as suitable for use 4.2 Preliminary assessment The water shall be examined in accordance with the test procedures stated in Table 1. Water not conforming to one or more of the requirements in

36、 Table 1 may be used only, if it can be shown to be suitable for use in concrete, in accordance with 4.4. 5 EN 1008:2002 (E) Water not from sources classified in 3.2: The colour shall be assessed qualitatively as pale yellow or paler. Water from sources classified in 3.2 Table 1 - Requirements and t

37、est procedures for preliminary inspection of mixing water 6,1,1 A.4 1 Water from sources classified in 3.2. No smell, except the odour allowed for potable water and a slight smell of cement and where blastfurnace slag is present in the water, a slight smell of hydrogen sulphide. 2 6.1 .I 3 Water fro

38、m other sources. No smell, except the odour allowed for potable water. No smell of hydrogen sulphide after addition of hydrochloric acid. pH24 The colour shall be assessed qualitatively as yellowish brown or paler, after addition of NaOH. 4 6.1 .I 6,1,2 5 End use Prestressed concrete or grout Concre

39、te with reinforcement or embedded metal 6 Max. chloride content mgll 500 1 O00 7 Oils and fats Detergents Colour Suspended matter Odour Acids Humic matter Requirement I proced Ure Not more than visible traces. I 6.1.1 Any foam should disappear within 2 minutes. I 6.1.1 Water from other sources: Maxi

40、mum 4 ml. sediment. 6.1 .I 4.3 Chemical properties 4.3.1 Chlorides The chloride content of the water, tested in accordance with 6.1.3, and expressed as CI, shall not exceed the levels given in Table 2, unless it can be shown that the chloride content of the concrete will not exceed the maximum value

41、 for the specified class selected from 5.2.7 of EN 206-1 :2000. Table 2 - Maximum chloride content of mixing water Concrete without reinforcement or embedded metal I 4 500 Test procedu re 6.1.3 4.3.2 Sulphates The sulphate content of the water, tested in accordance with 6.1.3 and expressed as SO:- s

42、hall not exceed 2 O00 mg/l. 4.3.3 Alkali If alkali-reactive aggregates are expected to be used in the concrete, the water shall be tested for its alkali content in accordance with 6.1.3. The equivalent sodium oxide content of the water shall not normally exceed 1 500 mg/l. If this limit is exceeded,

43、 the water may be used only if it can be shown that actions have been taken to prevent deleterious alkali-silica reactions. 6 EN 1008:2002 (E) Substance Sugars Phosphates; expressed as P205 Lead; expressed as Pb2 Zinc; expressed as Zn2 Nitrates; expressed as NOa- NOTE silica reactions in concrete.“

44、See CEN Report CR 1901 ,Regional specifications and recommendations for the avoidance of damaging alkali Maximum content Test procedu re (mgW 1 O0 1 O0 500 6.1.3 1 O0 1 O0 4.3.4 Harmful contamination In the first instance qualitative tests for sugars, phosphates, nitrates, lead and zinc may be carri

45、ed out. If the qualitative tests show a positive result, either the quantity of the substance concerned shall be determined or tests for setting time and compressive strength shall be performed. If chemical analysis is chosen, the water shall conform to the limits given in Table 3. 4.4 Setting time

46、and strength When tested in accordance with 6.1.4 the initial setting time obtained on specimens made with the water sh II be not less than 1 hour and not differ by more than 25 % from the initial setting time obtained on specimens made with distilled or de-ionised water. The final setting time shal

47、l not exceed 12 hours and not differ by more than 25 % from the final setting time obtained on specimens made with distilled or de-ionised water. The mean compressive strength at 7 days of the concrete or mortar specimens, prepared with the water, shall be at least 90 % of the mean compressive stren

48、gth of corresponding specimens prepared with distilled or de-ionised water. 5 Sampling A sample of water of not less than 5 litres shall be taken. The sample shall be correctly identified and representative of the water to be used, due regard being given to the possible effects of seasonal fluctuati

49、ons. The sample shall be stored in a clean and sealed container. The container shall be rinsed out with water from the source prior to filling to capacity with the water sample. The water shall be tested within 2 weeks of sampling. 7 EN 1008:2002 (E) 6 Testing 6.1 Test methods 6.1.1 Preliminary assessment A small sub sample shall be assessed as soon as possible after sampling for oil and fats, detergents, colour, suspended matter, odour and humic matter. Bring any material that may have settled back into suspension by shaking the sample. Pour 80 ml of the sample