1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1767:1999 The Europ
2、ean Standard EN 1767:1999 has the status of a British Standard ICS 91.010.30; 91.080.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Products and systems for the protection and repair of concrete structures Test methods Infrared analysisThis British Standard, having been pr
3、epared 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 1999 BSI 09-1999 ISBN 0 580 32669 1 BS EN 1767:1999 Amendments issued since publication Amd. No. Date Comments Nat
4、ional foreword This British Standard is the English language version of EN 1767:1999. The UK participation in its preparation was entrusted by Technical Committee B/517, Concrete, to Subcommittee B/517/8, Repair and protection of concrete, which has the responsibility to: aid enquirers to understand
5、 the text; present to the responsible 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. A list of organizations represented on this subcommittee c
6、an be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using th
7、e “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from
8、 legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 4, an inside back cover and a back cover. The BSI copyright notice displayed throughout this document indicates when the document was last issued.CEN European Committee fo
9、r Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1767:1999 E EUROPEAN STANDARD EN 1
10、767 NORME EUROPE ENNE EUROPA ISCHE NORM June 1999 ICS 91.080.40 English version Products and systems for the protection and repair of concrete structures Test methods Infrared analysis Produits et syste mes pour la protection et la re paration des structures en be ton Me thodes dessais Analyse par s
11、pectrome trie infrarouge Produkte und Systeme fu r den Schutz und die Instandsetzung von Betontragwerken Pru fverfahren Infrarotanalyse This European Standard was approved by CEN on 2 May 1999. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions f
12、or giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three officia
13、l versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Bel
14、gium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 1767:1999 BSI 09-1999 Foreword This European Standard has been prepared by Technical Committee CEN/TC 104, Conc
15、rete (performance, production, placing and compliance criteria), the Secretariat of which is held by DIN. This European Standard describes a test method. Specifications for the products and systems for the repair and the protection of concrete structures will be subject of separate standards. This E
16、uropean 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 1999, and conflicting national standards shall be withdrawn at the latest by December 1999. According to the CEN/CENELEC Internal Regulations, th
17、e national standards organizations of the following countries are bound 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 King
18、dom. Contents Page Foreword 2 1 Scope 3 2 Normative reference 3 3 Principle 3 4 Apparatus 3 5 Reagents 3 6 Sampling 3 7 Procedure 3 8 Test report 4 Annex A (informative) Bibliography 4Page 3 EN 1767:1999 BSI 09-1999 1 Scope This European Standard describes a method to record an infrared spectrum. It
19、 applies to products based on synthetic resins before their application and more particularly, in the case of two-component products, to each component separately before mixing. It also applies to emulsions of polymers (latex) that are to be mixed with hydraulic binders. 2 Normative reference This E
20、uropean Standard incorporates 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 publicati
21、ons 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. EN 21512, Paints and varnishes Sampling of products in liquid or paste form. (ISO 1512:1991) 3 Principle 3.1 General principle
22、of infrared spectroscopy Organic molecules can enter into vibration at definite frequencies situated in the range of the infrared. If infrared radiation encounters the molecule and the frequency of the radiation matches a frequency of vibration of the molecule, some of the energy of the radiation is
23、 absorbed. Varying the wavelength of the infrared radiation reveals a series of absorption bands. The set of absorption bands constitutes an infrared spectrum. This spectrum is characteristic for the chemical nature of a particular compound. 3.2 Application to mixed products The test consists of rec
24、ording the infrared spectrum of the polymer binder of the product. When the product is an emulsion or contains solvents, pigment and filler, these constituents, which would affect the analysis of the spectrum, shall first be removed. The test result is an infrared spectrum of the polymer binder. Det
25、ails of procedure making it possible to reproduce the test under the same conditions, shall be reported. 4 Apparatus Infrared spectrophotometer. The reference spectral range shall be at least 4 000 cm 21 625 cm 21. Accessories of infrared spectrometry: chamber of fixed or variable thickness, NaCl, C
26、si, or KRS-5 windows, pelletizing press. Accessory for analysis by attenuated total reflection (ATR). Glass crystallizers, 70 mm in diameter and 40 mm high. Heating plate, adjustable to (60 2)8C. Desiccator. Vacuum oven, adjustable to a temperature of (50 2)8C and a pressure of 16 mbar to 33 mbar. N
27、OTE This vacuum is provided by a water-jet pump. Oven, adjustable to (105 2)8C. Centrifuge. Agitators, glassware, etc. Device to homogenize the sample (electric agitator, etc.). 5 Reagents Organic solvents. Potassium bromide powder (spectroscopic grade). 6 Sampling A representative and homogeneous s
28、ample of the product to be tested shall be taken according to EN 21512. 7 Procedure 7.1 Measurement of products without solvent or filler The infrared spectrum is determined directly. The choice of technique for producing the spectrum (spreading on slide, capillary film between two slides, pelletizi
29、ng at 1 % in KBr) depends on the consistency of the sample. 7.2 Measurement of products in solution or emulsion without a mineral filler When possible first of all an IR-spectrum of the original substance is recorded. Evaporate the solvent or the water as given below: place approximately 1 g of prod
30、uct into a crystallizer with a small glass agitator, then place the crystallizer on a heating plate until the solvent or water is removed; after evaporation of the solvent or water, break the skin that may have formed and put the crystallizer into a vacuum oven for one hour; let the crystallizer coo
31、l to ambient temperature in a desiccator. Record the infrared spectrum of the dry extract so produced. Check, that the solvent has really evaporated entirely by using suitable IR-bands. If evaporating the solvent is difficult, because of the consistency of the mixture, the process can be accelerated
32、 by adding about 25 ml of an organic solvent in the crystallizer. Thoroughly homogenize the mixture using the agitator, put the crystallizer back on the heating plate, and proceed as above.Page 4 EN 1767:1999 BSI 09-1999 The dry extract produced may not be homogeneous. To obtain a representative inf
33、rared spectrum, evaporate the product on a slide that is transparent in the infrared by placing the slide on a heating plate. In the case of an aqueous solution or emulsion, a water-resistant KRS-5 slide should be used. Using an ATR-crystal the sample can be dried with a fan. Products which contain
34、volatile matter (e.g. silanes) other than solvents will produce an IR-spectrum of the original substance only. 7.3 Measurement of products in solution or emulsion with mineral filler and product containing only a mineral filler Before recording the infrared spectrum, eliminate the filler as follows
35、place approximately 5 g of product into a centrifuge tube; add about 30 ml of an organic solvent and mix thoroughly using a glass agitator; centrifuge; collect the supernatant solution in a crystallizer; treat the centrifuging residue with another 30 ml of organic solvent, then mix thoroughly and ce
36、ntrifuge; add the supernatant solution to the first solution being evaporated; wash the residue once again and add the washing solution to the crystallizer then proceed as in 7.2. Then record the infrared spectrum of the dry extract produced. It should be taken care, that the solvent is removed enti
37、rely by using suitable absorption bands. 8 Test report The test report shall at least include the following information: a) a reference to this European Standard; b) all details necessary to identify the product tested; c) the type of preparation of the sample; d) the infrared spectrum with details
38、of the execution of the spectrum; e) the solvent used for extraction of the polymer binder; f) any deviation, by agreement or otherwise, from the procedure described; g) the date of the test. Annex A (informative) Bibliography 1 DIN 51 451, 1986, Pru fung von Mineralo lerzeugnissen und verwandten Pr
39、odukten Infrarotspektrometrische Analyse Allgemeine Arbeitsgrundlagen. 2 NF T 51-500, 1989, Plastiques Re sines thermodurcissables Analyse par spectrophotome trie infrarouge.blankBS EN 1767:1999 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
40、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsible for preparing British Stand
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