BS EN 196-10:2016 – TC:2020 Edition
$217.84
Tracked Changes. Methods of testing cement – Determination of the water-soluble chromium (VI) content of cement
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 89 |
This part of EN 196 specifies the method for the determination of the water-soluble chromium (VI) content of cement. A reference method is described consisting of two stages, an extraction procedure and an analysis of the filtered extract. Guidance on other extraction procedures, suitable for screening tests, for factory production control or other purposes, is given but in case of dispute or failure to comply with a regulatory limit only the reference method is used. The reference method has alternatives whereby the filtered extract may be subjected to an oxidation step or not. The criteria by which the appropriate procedure is selected are set down. Other instrumental procedures may be used for the analysis of the filtered extract provided they are calibrated against the analysis of the filtered extract using the reference procedure. In the case of a dispute, only the reference method is used. Annex A sets out a normative procedure to be followed in case this test method is used as the basis for evaluation of conformity of a cement with the regulatory limit in Regulation (EC) 1907/2006 . This part of EN 196 describes a method that applies to cements. It may have wider applicability but this would need to be verified by testing on a product-by-product basis. Guidance in the possible application of this European Standard to the determination of the water-soluble chromium (VI) content of cement-containing preparations is given in Annex B. Annexes C and D provide information on other test procedures based on paste extraction and thus depart from the performance of cement in its normal conditions of use. They may be carried out with or without the oxidation process. Users should be aware that results using these methods might be significantly different to those obtained by the reference method. In the case of dispute or failure to comply with the regulatory limit only the reference method is used. Annex E provides guidance on a method for determination of the excess reducing agent content of cement as used in the factory internal control system of some countries. Manufacturers using such an internal control method should ensure themselves of the relevance of results in comparison with testing by the reference method.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 52 | European foreword |
| 53 | Introduction |
| 54 | 1 Scope 2 Normative references |
| 55 | 3 General requirements for testing 3.1 Number of tests 3.2 Repeatability and reproducibility 3.3 Expression of masses, volumes, factors and results 3.4 Blank determinations 4 Reagents |
| 56 | 5 Apparatus |
| 57 | Figure 1 — Typical arrangement of filtration equipment 6 Preparation of a test sample of cement |
| 58 | 7 Extraction procedure 7.1 Principle 7.2 Preparation of mortar 7.2.1 Composition of mortar 7.2.2 Mixing of mortar |
| 59 | 7.3 Filtration 8 Determination of chromium (VI) 8.1 General 8.2 Measurement of absorbance without oxidation 8.2.1 Construction of the calibration curve |
| 60 | 8.2.2 Sample absorbance 8.2.3 Determination of chromium (VI) concentration 8.3 Measurement of absorbance with oxidation 8.3.1 Construction of the calibration curve 8.3.1.1 Preparation of calibration solutions 8.3.1.2 Oxidation and measurement of absorbance |
| 61 | 8.3.1.3 Plotting the calibration curve 8.3.2 Sample absorbance with oxidation 8.3.3 Determination of chromium (VI) concentration 9 Calculation and expression of results 9.1 Calculation |
| 62 | 9.2 Expression of results 10 Reporting of results 11 Repeatability and reproducibility |
| 63 | Annex A (normative) Evaluation of the compliance of cement with the regulatory limit in 47 to Annex XVII of Regulation (EC) No. 1907/20062F on water-soluble hexavalent chromium content A.1 Foreword A.2 Scope |
| 64 | A.3 Normative references A.4 Terms and definitions |
| 65 | A.5 Factory production control by the manufacturer A.5.1 General requirements A.5.2 Internal control A.5.2.1 Process control A.5.2.1.1 General A.5.2.1.2 Reducing agent and composition of cement A.5.2.1.3 Control of off-specification production |
| 66 | A.5.2.2 Measuring and testing A.5.2.2.1 Inspection, measuring and test equipment A.5.2.2.2 Inspection and test status A.5.2.3 Handling, storage, packaging and delivery A.5.3 Auto control testing of samples A.5.3.1 General A.5.3.2 Sampling, storage and testing A.5.3.2.1 Sampling A.5.3.2.2 Storage of samples before testing |
| 67 | A.5.3.2.3 Testing A.5.3.3 Corrective action A.6 Tasks for the verification body A.6.1 General A.6.2 Surveillance, assessment and acceptance of factory production control A.6.2.1 Inspection tasks A.6.2.2 Frequency of inspections A.6.2.3 Reports |
| 68 | A.6.3 Evaluation of the results of auto control testing of samples A.6.3.1 Evaluation tasks A.6.3.2 Number and timing of evaluations A.6.3.3 Control period A.6.3.4 Evaluation of tests results A.6.3.5 Reports A.6.4 Audit testing of samples taken at the factory/depot A.6.4.1 General A.6.4.2 Sampling |
| 69 | A.6.4.3 Transportation and storage of samples before testing A.6.4.4 Testing A.6.4.5 Evaluation of tests results A.6.4.6 Reports A.6.4.7 Proficiency testing A.7 Compliance criteria A.7.1 General A.7.2 Single result compliance criterion |
| 70 | A.8 Compliance assessment A.8.1 General A.8.2 Evaluation of test results |
| 71 | A.8.3 Evaluation of the implementation of the works’ quality manual A.8.4 Evaluation of cement compliance and report |
| 72 | A.9 Actions in the event of non-compliance A.9.1 Actions to be taken by the manufacturer A.9.2 Actions to be taken by the verification body A.10 Requirements for dispatching centres |
| 73 | Annex B (informative) Guidance on the application of this European Standard to the determination of the water soluble chromium (VI) content of cement-containing preparations B.1 Background B.2 Extraction procedure |
| 74 | B.3 Filtration procedure B.4 Calculation and reporting of results B.5 Evaluation of compliance |
| 75 | Annex C (informative) Guidance on screening test method (1) using paste extraction – method based on DS 1020 C.1 Object and field of application C.2 Principle C.3 Reagents C.4 Apparatus |
| 76 | C.5 Procedure C.5.1 Calibration C.5.2 Analysis |
| 77 | C.6 Calculation of results C.7 Reporting result C.8 Precision and accuracy C.9 Report |
| 78 | Annex D (informative) Guidance on screening test method (2) using paste extraction – method based on TRGS 613 D.1 Significance and use D.2 Basic principles of the method D.3 Apparatus |
| 79 | D.4 Materials D.5 Construction of a calibration curve D.5.1 General D.5.2 Construction of a calibration curve with consideration of reducing substances |
| 80 | D.5.3 Construction of a calibration curve without consideration of reducing substances D.6 Sample preparation and analysis |
| 81 | D.7 Evaluation and Interpretation D.8 Health and safety |
| 82 | Annex E (informative) Guidance on the photometric determination of chromium reduction capacity in cements E.1 Foreword E.2 Summary E.3 Scope E.4 Apparatus |
| 83 | E.5 Reagents |
| 84 | E.6 Procedure E.7 Calculations |
| 85 | E.8 Result Table E.1 — Limits of increased concentration of the solutions E.9 Control of instrument |
| 86 | Bibliography |
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BS EN 196-10:2016
Methods of testing cement – Determination of the water-soluble chromium (VI) content of cement Published…
