BSI PD CEN/TS 16637-1:2014
$198.66
Construction products. Assessment of release of dangerous substances – Guidance for the determination of leaching tests and additional testing steps
| Published By | Publication Date | Number of Pages |
| BSI | 2014 | 52 |
(1) This Technical Specification allows the identification of the appropriate leaching test method for the determination of the release of Regulated Dangerous Substances from construction products into soil, surface water and groundwater. This document provides a stepwise procedure for the determination of appropriate release tests, including:
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guidance for the identification of construction products potentially emitting Regulated Dangerous Substances;
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determination of the test method based on general product properties;
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choice of the test method using specific product properties.
(2) Furthermore, this Technical Specification gives general guidance for CEN Technical Product Committees on basic aspects (sampling, sample preparation and storage, eluate treatment, analysis of eluates and documentation) to be specified in the relevant product standards.
(3) Metallic products, coatings on metallic products and organic coatings for metals are not considered in the determination scheme of this Technical Specification since the test method in CEN/TS 16637‑2 (tank test) is not appropriate for the testing of these construction products due to a different release mechanism (solubility control).
Metallic products are excluded from the scope of CEN/TS 16637‑2 because the principles of that test (diffusion) are not obeyed by these products. Metallic products have shown pH dependent solubility control, which means that metals released from the oxidation layer on the metal until the maximum possible solubility level at the prevailing pH conditions in the surrounding water is reached (more water in contact with the same metal surface means more metals released and more time does not lead to more release due to solubility control). Maximum level of release can often be reached in minutes to hours. More generally, it can be stated that expression of results for metallic surfaces in mg/(m2·s) is always “ conditional”, i.e. dependent on the local conditions at which the measurements were done, such as the volume of water relative to the surface area. For impact assessment, it is necessary to understand the above mentioned effects and to capture these effects in a test reflecting the dominant release mechanism. However, such a test method is currently unavailable. If the intrinsic leaching behaviour is known, release under specified local conditions could be determined by modelling. Furthermore, no notified regulations exist for metallic products at the time these Technical Specifications have been published.
(4) It is assumed that intermittent contact with water (e.g. exposure to rainwater) is tested – by convention – as permanent contact. For some coatings, (e.g. some renders with organic binders according to EN 15824 ) in intermittent contact to water, physical and chemical properties might be altered in permanent contact with water. These products are not considered in the determination scheme of this Technical Specification since the test method in CEN/TS 16637‑2 is not appropriate for the testing of these construction products.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | Contents Page |
| 6 | Foreword |
| 7 | Introduction |
| 9 | 1 Scope 2 Normative references 3 Terms and definitions |
| 10 | 3.1 Sampling and products |
| 12 | 3.2 Release and laboratory testing |
| 15 | 4 Symbols and abbreviations |
| 16 | 5 Determination of the appropriate release test method 5.1 Step 1: Information on construction products that may be examined by leaching tests 5.2 Step 2: Determination of test method 5.2.1 Principles and general review of the test methods |
| 17 | 5.2.2 Product properties and test conditions for the determination of the relevant test method Table 1 — Requirements on monolithic granular product |
| 19 | Figure 1 — Scheme for the determination of leaching tests for construction products |
| 20 | 6 Adoption of modules for the product specific leaching standard 6.1 Overview of the modules |
| 21 | Figure 2 — Links between the essential elements of a test procedure wherein the main steps are numbered (1 to 7) |
| 22 | 6.2 Product sampling and transport to the laboratory 6.2.1 Introduction on sampling 6.2.2 Objective of sampling 6.2.3 Preparation of a sampling plan and sampling strategy 6.2.3.1 General |
| 23 | Figure 3 — Illustration of the relations between the key terms of product sampling 6.2.3.2 Sampling approach |
| 24 | 6.2.3.3 Population and sub-population 6.2.3.4 Scale 6.2.3.5 Size of samples, of increments when relevant and sampling techniques |
| 25 | 6.2.3.6 Sampling of complex, composite and large products 6.2.3.7 Sampling location and moment 6.2.4 Information from the testing laboratory needed to complement the product sampling plan |
| 26 | 6.2.5 Packaging and transport of laboratory sample 6.2.6 Sample description and marking of laboratory sample and sampling report 6.2.7 Chain of custody report |
| 27 | 6.2.8 Dispatch of product samples, time schedule 6.2.9 Report on sampling 7 Indirect methods 7.1 Definition 7.2 Requirements for indirect methods |
| 28 | 7.3 Examples of indirect methods |
| 29 | Annex A (informative) Release scenarios and impact assessment A.1 Release scenarios and test determination |
| 30 | Table A.1 — Water contact and release scenarios for horizontal tests A.2 Impact assessment and impact evaluation A.2.1 Source-pathway-target approach for impact assessment |
| 31 | A.2.2 How to use “intended use” and “intended conditions of use” A.2.3 Impact evaluation Figure A.1 – Frame of the impact assessment and the impact evaluation |
| 32 | A.3 Responsibilities Figure A.2 — Responsibility and interpretation of “release scenarios”, “intended conditions of use” and “impact modelling” to derive product release criteria |
| 33 | Annex B (informative) Different types of leaching tests B.1 General B.2 Reference tests and indirect test B.3 Leaching tests for products with reducing properties |
| 34 | Annex C (informative) Key concepts for product sampling C.1 Representativeness |
| 35 | C.2 Uncertainty |
| 36 | C.3 Sampling under various stages of production control C.4 Objective of sampling C.5 Preparation of a sampling plan |
| 38 | Figure C.1 — Details on the key steps of product sampling |
| 39 | C.6 Considerations on sampling strategy C.6.1 General C.6.2 Sampling approach C.6.3 Population and sub-population |
| 40 | C.6.4 Scale |
| 43 | Figure C.2 — Results over time for a product tested at three different scales, 100 kg (1), 1 000 kg (2) and 2 000 kg (3), where the horizontal line (4) is the cut off for non conformity C.6.5 Size of increments and samples |
| 44 | C.6.6 Sampling of complex, composite and large products C.6.7 Sampling location and moment |
| 46 | Annex D (informative) Example of a chain of custody report |
| 47 | Annex E (informative) Example of a sampling report |
| 48 | Bibliography |
