1、BRITISH STANDARD BS EN 1015-17:2000 Incorporating Amendment No.1 Methods of test for mortar for masonry Part 17: Determination of water-soluble chloride content of fresh mortars The European Standard EN 1015-17:2000, with the incorporation of amendment A1:2004, has the status of a British Standard I
2、CS 91.080.30; 91.100.10 BS EN 1015-17:2000 This British Standard, having been prepared under the direction of the Sector Committee for Building and Civil Engineering, was published under the authority of the Standards Committee and comes into effect on 15 September 2000 BSI 30 November 2004 ISBN 0 5
3、80 36383 X National foreword This British Standard is the official English language version of EN 1015-17:2000, including amendment A1:2004, which is included in a package of new European Standards being prepared by CEN/TC 125 relating to mortar for masonry. No British Standard is superseded. The UK
4、 participation in its preparation was entrusted by Technical Committee B/519, Masonry and associated tests, to Subcommittee B/519/2, Mortar, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The Bri
5、tish Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards On
6、line. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the respons
7、ible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover
8、, the EN title page, pages 2 to 9 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 15418 30 November 2004 Changes to subclauses 5.3, 6.8, 7.1 and Clause 10 EUROPEAN STANDARD N
9、ORME EUROPENNE EUROPISCHE NORM EN 1015-17 March 2000 + A1 October 2004 ICS 91.100.10 English version Methods of test for mortar for masonry - Part 17: Determination of water-soluble chloride content of fresh mortars (includes amendment A1:2004) Mthodes dessai des mortiers pour maonnerie - Partie 17:
10、 Dtermination de la teneur en chlorure soluble des mortiers frais (inclut lamendement A1:2004) Prfverfahren fr Mrtel fr Mauerwerk - Teil 17: Bestimmung des Gehalts an wasserlslichem Chlorid von Frischmrteln (enthlt nderung A1:2004) This European Standard was approved by CEN on 25 February 2000, amen
11、dment A1 was approved by CEN on 6 August 2004. CEN members are bound to comply with the CEN/CENELEC 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 concerni
12、ng such national standards may be obtained on application to the Central Secretariat 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 lan
13、guage and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg,
14、Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels 2000 CEN All rights of exploi
15、tation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1015-17:2000 + A1:2004 EPage 2 EN 1015-17:2000 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Principle 4 4 Symbols 4 5 Apparatus 5 6 Reagents 5 7 Sampling and sample preparation. 6 8 Procedur
16、e 7 9 Calculation and expression of results 7 10 Test report. 8 Page 3 EN 1015-17:2000 Foreword This European Standard has been prepared by Technical Committee CEN/TC 125, Masonry, the Secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, eithe
17、r by publication of an identical text or by endorsement, at the latest by September 2000, and conflicting national standards shall be withdrawn at the latest by September 2000. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are boun
18、d to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. This European Standard calls for the use of substances and proced
19、ures that may be injurious to health if adequate precautions are not taken. It refers only to the technical suitability and does not absolve the user from legal obligations relating to health and safety at any stage. Foreword to amendment A1 This document (EN 1015-17:2000/A1:2004) has been prepared
20、by Technical Committee CEN/TC 125 “Masonry”, the secretariat of which is held by BSI. 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 April 2005, and conflicting national standards shall be withdr
21、awn at the latest by July 2006. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ice
22、land, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Page 4 EN 1015-17:2000 1 Scope This European Standard specifies a method for determining the water-soluble chloride content of fre
23、sh mortars. 2 Normative references This European Standard incorporates by dated or undated references, 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
24、 to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. prEN 998-1 Specification for mortar for masonry - Part 1: Rendering and plastering mo
25、rtar. prEN 998-2 Specification for mortar for masonry - Part 2: Masonry mortar. EN 1015-2 Methods of test for mortar for masonry - Part 2: Bulk sampling of mortars and preparation of test mortars. EN 1015-3 Methods of test for mortar for masonry - Part 3: Determination of consistence of fresh mortar
26、 (by flow table). ISO 384 Laboratory glassware - Principles of design and construction of volumetric glassware. 3 Principle An aqueous extract containing water soluble chlorides from the mortar sample is prepared. The dissolved chloride is precipitated using a known volume of standard silver nitrate
27、 solution. Any sulfide present is oxidized to sulfate or decomposed and does not interfere. After boiling, the precipitate is washed with dilute nitric acid and discarded. The filtrate and washings are cooled to less than 25 C. The excess silver nitrate is then titrated with a standard ammonium thio
28、cyanate solution using an iron (III) salt as indicator. This method gives the total halogen content except for fluoride and expresses the result as percentage of Cl of sample. 4 Symbols V 1 is the sample titre of 0,1 M ammonium thiocyanate solution, (ml) V 2is the blank titre of 0,1 M ammonium thioc
29、yanate solution, (ml) m is the mass of the test portion, (g) f is the factor of molarity relating to ammonium thiocyanate solution, (usually 0,10 mol/l) Page 5 EN 1015-17:2000 5 Apparatus 5.1 General The volumetric glassware shall be of analytical accuracy, i.e. class A or class B, defined in ISO 38
30、4. 5.2 Weighing instrument, with a capacity of 200 g and an accuracy of 0,00 01 g. 5.3 10 ml burette, graduated to 0,1 ml. 5.4 Desiccator, containing anhydrous magnesium perchlorate Mg(ClO 4 ) 2 or other suitable desiccant. 5.5 Filter paper, coarse (pore diameter approximately 20 m). 5.6 5 ml pipett
31、e. 5.7 500 ml stoppered conical flask. 5.8 250 ml borosilicate glass beaker. 5.9 Sieves, with 10 mm and 0,125 mm apertures. 5.10 Polyethylene bottle with a screw-on cap, capacity approximately 150 ml. 5.11 Rotary shake, capable of revolving at 60 rev/min or magnetic stirrer and polyethylene covered
32、follower. 5.12 1 000 ml volumetric flask. 5.13 Borosilicate glass wide-mouthed jar with airtight cap, capacity approximately 500 ml. 6 Reagents 6.1 General The degree of dilution of the concentrated nitric acid (6.2) is given as a volumetric sum, for example, dilute nitric acid 1+2 (6.3) means that
33、1 volume of concentrated nitric acid is mixed with 2 volumes of water. Use reagents of recognized analytical grade. For the determination of factor f, see 6.8. 6.2 Concentrated nitric acid (HNO 3 ), density 1,40 to 1,42 kg/l at 20 C. 6.3 Dilute nitric acid, 1+2. 6.4 Dilute nitric acid, 1+100. Page 6
34、 EN 1015-17:2000 6.5 Silver nitrate (AgNO 3 ), dried at 150 C, then cooled and stored in a desiccator (5.4). 6.6 Silver nitrate solution, 0,10 mol/l. Dissolve 16,988 g of silver nitrate (6.5) in water (6.10) in a 1 000 ml volumetric flask (5.12) and make up to the mark. Store the solution in a brown
35、 glass flask and protect it from the light. 6.7 Ammonium thiocyanate (NH 4 SCN). 6.8 Ammonium thiocyanate solution, approximately 0,10 mol/l. Dissolve 7,6 g of ammonium thiocyanate (6.7) in water and make up to 1 000 ml H 2 O. Determine factor f by titrating the ammonium thiocyanate solution (6.8) a
36、gainst a known volume of the standard silver nitrate solution (0,1 mol/l) (6.6) using ammonium iron (III) sulfate indication (6.9). 6.9 Ammonium iron (III) sulfate NH 4 Fe(SO 4 ) 2 12 H2O indicator solution. Add 10 ml of dilute nitric acid 1+2 (6.3) to 100 ml of a cold saturated solution of ammonium
37、 iron (III) sulfate in water. 6.10 Water, with a maximum electrical conductivity of 2 mS/cm. 7 Sampling and sample preparation 7.1 General The fresh mortar for this test shall have a minimum volume of 1,5 1 or at least 1,5 times the quantity needed to perform the test, whichever is the greater, and
38、shall either be obtained by reduction of the bulk test sample of dry mortar for factory made dry mortars or the bulk test sample of fresh mortar for all other mortar (see EN 1015-2), i.e. by quartering or by preparation in the laboratory from water and the other constituents. Two test samples shall
39、be prepared from the fresh mortar sample. Factory made wet mortars and prebatched air-lime/sand wet mortars shall be used within their specified workable life. Laboratory prepared mortars, unless retarded, shall be used immediately. For factory made dry mortars and laboratory prepared mortars, the l
40、ength of mixing period shall be measured from the moment when the last of the constituents are introduced into the mixer. 7.2 Preparation 7.2.1 Factory made dry mortar If necessary, crush the sample to pass completely through a 10 mm test sieve (5.9). Then treat the sample as in 7.3. 7.2.2 Fresh mor
41、tar Thoroughly mix each sample and reduce to about 250 g. Then place in a wide-mouthed jar (5.13) and enclose with an airtight cap. Immediately before starting the test, remix the reduced sample with a spatula. Dry at 105 C 5 C to a constant mass (where organic constituents are used, e.g. aggregates
42、 made of expanded polystyrene, a drying temperature of 60 C 5 C shall be used). The sample is considered to have reached constant mass if two successive weighings, 2 h apart during the drying, do not differ by more than 0,2 % of the mass of the dry specimen. Crush the dried sample to pass completely
43、 through a 10 mm test sieve (5.9). Then treat the sample as in 7.3. Page 7 EN 1015-17:2000 7.3 Grinding Reduce the sample to 50 g and crush to pass completely through a 0,125 mm test sieve. This shall be the analytical sample. If suitable mechanical grinding equipment is not available, use the follo
44、wing procedure to obtain the analytical sample. Crush the remainder of the sample to pass completely through a 2,4 mm test sieve. Grind a representative sub-sample of mass not less than 30 g to pass completely a 0,500 mm test sieve. Mix the ground sub-sample well and from this take a further sub-sam
45、ple of mass at least 12 g and grind to pass completely a 0,125 mm test sieve. This shall be the analytical sample. NOTE Metallic iron introduced during the grinding procedure should be removed with a magnet before any chemical analysis is commenced. 8 Procedure 8.1 Extraction of water soluble chlori
46、de Weigh 10 g 0,005 g of the sample (ground finer than 0,125 mm) at a temperature of 20 C 5 C and transfer it to a polyethylene bottle (5.10). Add 100 ml of cold distilled or deionized water (6.10), close the bottle with a screw-on polyethylene top and shake the bottle for 60 min using a rotary shak
47、er revolving at about 60 r/min or use a magnetic stirrer using a polyethylene covered follower (5.11). Allow the bottle and contents to stand overnight (minimum of 15 h maximum of 24 h). Filter the suspended sample and collect the filtrate into a 250 ml borosilicate glass beaker (5.8). Wash residue
48、on the filter with 25 5 ml of distilled or deionized water (6.10). Acidify the filtrate by adding 20 ml dilute nitric acid (1+2) (6.3) and bring to the boil. Proceed as in 8.2. 8.2 Procedure Add 5 ml of silver nitrate solution (6.6) by pipette (5.6) into the boiling solution from 8.1. Then boil for
49、1 to 2 min and cool to below 25 C. Transfer the contents of the beaker to a 500 ml conical flask (5.7) using cold distilled or deionized water to rinse the beaker. Add 5 drops of indicator solution (6.9) and titrate (5.3) with the ammonium thiocyanate solution (6.8) alternately shaking the flask vigorously and checking until a drop of this solution produces a faint reddish-brown colouration which no longer disappears on shaking. Record the volume, V 1 , of ammon
copyright@ 2008-2019 麦多课文库（www.mydoc123.com）网站版权所有
备案/许可证编号：苏ICP备17064731号-1