1、July 2007DEUTSCHE NORM English price group 6No 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 13.060.50!,yh)“9866906www.
2、din.deDDIN EN 13577Chemical attack on concrete Determination of aggressive carbon dioxide content in waterEnglish version of DIN EN 13577:2007-07Chemischer Angriff an Beton Bestimmung des Gehalts an angreifendem Kohlendioxid in WasserEnglische Fassung DIN EN 13577:2007-07www.beuth.deDocument compris
3、es 10 pages09.07DIN EN 13577:2007-07 2 National foreword This standard has been prepared by 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 Commi
4、ttee), Technical Committee 005-07-27 AA Betonangreifende Stoffe. EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 13577April 2007ICS 13.060.50; 91.100.30English VersionChemical attack on concrete - Determination of aggressivecarbon dioxide content in waterAttaque chimique du bton - Dtermination de
5、la teneur endioxyde de carbone agressif de leauChemischer Angriff an Beton - Bestimmung des Gehalts anangreifendem Kohlendioxid in WasserThis European Standard was approved by CEN on 8 March 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions
6、 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 offici
7、al 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 Austria, Bel
8、gium, 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 COMMITTEE FOR S
9、TANDARDIZATIONCOMIT 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 13577:2007: EEN 13577:2007 (E) 2 Contents Page Fore
10、word3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Principle4 5 Apparatus .4 6 Procedure .5 7 Expression of results 6 8 Test report 6 9 Precision.6 Annex A (informative) Example of a test report - Determination of aggressive CO2content .7 Bibliography 8 EN 13577:2007 (E) 3 Forewor
11、d This document (EN 13577:2007) 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 the
12、latest by October 2007, and conflicting national standards shall be withdrawn at the latest by October 2007. This European Standard describes a method for testing water which may be aggressive to hardened concrete. It is based on DIN 4030 “Assessment of water, soil and gases for their aggressiveness
13、 to concrete“. No existing European Standard is superseded. 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 Republic, Denmark, Estonia, Finland,
14、 France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 13577:2007 (E) 4 1 Scope This European Standard specifies a reference method for the
15、 determination of carbon dioxide present in water and which has a capacity to dissolve in lime from concrete. It is not applicable to the measurement of total carbon dioxide present in water. If other methods are used, it needs to be shown, that they give results equivalent to those obtained by this
16、 reference method. This test does not apply to water that has a pH less than 4,3. In case of dispute, only the reference method is used. 2 Normative references Not applicable. 3 Terms and definitions For the purposes of this document, the following term and definition applies. 3.1 aggressive CO2quan
17、tity of carbon dioxide present in water which has a capacity to dissolve lime in concrete 4 Principle Calcium carbonate powder is added to water. After the reaction of aggressive CO2with calcium carbonate is complete, the water is titrated with acid. The difference in titration with a second sample
18、of the same water which has not been subjected to the reaction with calcium carbonate will give the aggressive CO2content of the water. 5 Apparatus 5.1 Laboratory equipment 5.1.1 balance reading up to 100 g accurate to 0,1 mg. 5.1.2 pH meter (in calibration) or a pH indicator (e.g. metylorange). 5.1
19、.3 magnetic stirrer fitted with thermosstatic control. 5.1.4 thermometer with a measuring range from 0 to 30 C and scale divisions of 0,2 C. 5.1.5 25 ml burette accurate to 0,03 ml. 5.1.6 100 ml pipette accurate to 0,1 ml. EN 13577:2007 (E) 5 5.1.7 sample bottle of at least 1 litre. 5.1.8 bottle of
20、0,5 litre capacitiy with screw closure. 5.1.9 250 ml beaker. 5.1.10 thermally insulated transport boxes (when required). 5.2 Reagents 5.2.1 Precipitated calcium carbonate powder. 5.2.2 Hydrochloric acid (0,100 M). WARNING Hydrochloric acid is corrosive. Take precautions to avoid contact with the eye
21、s or inhalation of vapour. Prevent skin contact by wearing gloves and suitable protective clothing. If acid enters the eye or touches the skin, wash it out thoroughly with clean water and seek medical treatment without delay. 6 Procedure 6.1 Preparations Prior to sampling water 10 g of calcium carbo
22、nate powder shall be weighed and put into the 0,5 l bottle (5.1.8). 6.2 Sampling Caution. Carbon dioxide is easily lost from water during sampling, transit and storage of samples. Consequently, the water sample shall be taken with care not to remove the dissolved gas and shall be tested as soon as p
23、ossible after collection. Fill the sample bottle (5.1.7) with water to be tested. Then use this sample bottle (5.1.7) to fill slowly the 0,5 l bottle (5.1.8) containing the 10 g of calcium carbonate powder which shall be filled slowly, care being taken not to flush out the powder while filling. The
24、bottle shall be completely filled, hermetically sealed after collecting the sample and distinctively and permanently marked by the sampler with the sample number, point of collection, sampling date and sampling time. The remaining water shall be kept in the sampler bottle for the second measurement.
25、 The composition of water sample shall not alter while it is being transported, e.g. due to change in temperature. The change in temperature during transportation from the point of collection and testing in the laboratory shall not exceed 5 C . The time between collection and determination of the ag
26、gressive CO2content, shall not exceed 48 h. When appropriate, thermally insulated transport boxes shall be used. 6.3 Testing After sampling and just prior to testing, the temperature of the water shall be measured to the nearest 0,2 C and reported in the sampling record. The 0,5 l bottle (containing
27、 the 10 g of CaCO3powder) shall be vigorously shaken for not less than 2 h. Care shall be taken to ensure that the temperature of water does not vary by more than 2 C from the temperature measured during collection from the temperature measured after sampling. If necessary the magnetic thermo stated
28、 device shall be used. The use of an automatic titrater is a permitted alternative procedure. 100 ml of the sample water shall be titrated with hydrochloric acid to a pH value of 4,3. EN 13577:2007 (E) 6 H1is the volume in ml of acid necessary for this titration. After the excess calcium carbonate h
29、as settled, 100 ml of the clear supernatant solution shall be titrated with the hydrochloric acid to a pH value of 4,3. H2is the volume in ml of acid necessary for this titration. Repeat the measurement with a second sample of the clear supernatant solution taken from the remaining solution in the s
30、ample bottle (5.1.7). 7 Expression of results 7.1 Calculation The lime dissolving capacity (LDC) of the sample is calculated from the equation: LDC = 28 (H2- H1) expressed in mg of CaO/l The aggressive CO2content of the sample is given by multiplying LDC by the ratio 44/56. 7.2 Result The mean value
31、 of each determination from the two samples shall be taken as the aggressive CO2content of the water. It shall be expressed in mg/l rounded to the nearest whole number. 8 Test report The report shall include: a) unambiguous identification of the test sample; b) location of performance of test; c) da
32、te and time of collection; d) time of performance of test; e) temperatures of sample (after sampling and just prior to testing); f) calculated aggressive CO2contents and mean value; g) identification of person carrying out the test; h) deviations from the standard test method (if any); i) declaratio
33、n by the person carrying out the test that it was carried out in accordance with the standard except as noted in h). A pro-forma for a test report is given in Annex A. 9 Precision The standard deviation for repeatability is 0,3 mg/l. EN 13577:2007 (E) 7 Annex A (informative) Example of a test report
34、 - Determination of aggressive CO2content Client Test organisation Test location Test item Sample identification: Date and time of collection: Type of water: Temperature of water after sampling: (ground water, surface water etc.) Temperature of water just prior to testing: Point of collection: (bore
35、hole, pit etc.) Depth of collection: Test and test results Time of performance of test: pH meter reference number: Any deviation from standard test method: Aggressive CO2content: Test 1: mg/l Test 2: mg/l Result: mg/l Except as detailed above this test was carried out in accordance with EN 13577 Tec
36、hnical responsibility Responsible person: Name: Position: Signature: Certificate identification: Certificate No: Date issued: EN 13577:2007 (E) 8 Bibliography 1 EN 206-1, Concrete Part 1: Specification, performance, production and conformity 2 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
