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BS EN 16637-2:2023

BS EN 16637-2:2023

$215.11

Construction products: Assessment of release of dangerous substances – Horizontal dynamic surface leaching test

Published By Publication Date Number of Pages
BSI 2023 76
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This document specifies a dynamic surface leaching test (DSLT) which is aimed at determining the release per unit surface area as a function of time of inorganic and/or non-volatile organic substances from a monolithic, plate- or sheet-like product, when it is put into contact with an aqueous solution (leachant). The test method is not suitable for substances that are volatile under ambient conditions. This test is a parameter specific test focusing on identifying and specifying parameter specific properties tested under specified conditions. It is not aimed at simulating real situations. The application of results to specific intended conditions of use can be established by means of modelling (not included in this document). The test method applies to more or less regularly shaped test portions consisting of monolithic test pieces with minimum dimensions of 40 mm in all directions [volume > 64 000 mm3 (64 cm3)]. It also applies to plate- or sheet-like products with surface areas of minimum 10 000 mm2 (100 cm2) exposed to the leachant. Products designed to drain water (e.g. draining tiles, porous asphalt) and monolithic granular products according to EN 16637 1:2023, Table 1, are also tested by this test method. All products to be tested are assumed to maintain their integrity over a time frame relevant for the considered intended use. The modification for granular construction products with low hydraulic conductivity (Annex A) applies for granular particles with so little drainage capacity between the grains that percolation in percolation tests and in practice is nearly impossible. Metals, metallic coatings and organic coatings on metals are excluded from the scope of this document because the principles of this test (diffusion) are not obeyed by these products. Guidance on the need for testing of these products is under consideration. For some coatings (e.g. some renders with organic binders according to EN 15824 [9]) in intermittent contact with water, physical and chemical properties might be changed in permanent contact with water. For these products, this document is not appropriate. Guidance on the applicability of the test method to a given product is outlined in EN 16637 1. NOTE 1 This test method is only applicable if the product is chemically stable and the matrix does not dissolve. For construction products that are possibly used in contact with water this is usually the case as construction products are then supposed to be dimensionally stable. If a product possibly wears substantially in its intended use, the test cannot provide proper information. If the product contains a substantial amount of water-soluble compounds, e.g. gypsum or anhydrite, the matrix could (partially) dissolve and lead to dimensional instability of the test piece. In this case, the test standard also cannot be used. NOTE 2 It is not always possible to optimize test conditions simultaneously for inorganic and organic substances. Optimum test conditions can also vary between different groups of organic substances. Test requirements for organic substances are generally more stringent than those for inorganic substances. The test conditions suitable for measuring the release of organic substances will generally also be applicable to inorganic substances.

PDF Catalog

PDF Pages PDF Title
2 undefined
9 1 Scope
2 Normative references
10 3 Terms and definitions
14 4 Symbols and abbreviations
4.1 Symbols
4.2 Abbreviations
15 5 Principle
5.1 General principle
16 5.2 Number of eluates
17 6 Reagents
6.1 General
6.2 Leachant
6.3 Rinsing solutions
7 Equipment
18 8 Sample preparation
8.1 Provisions on the laboratory sample
19 8.2 Provisions on test sample and test portion
20 8.3 Determination of the geometric surface area
8.3.1 General
8.3.2 Regular test pieces
8.3.3 Test pieces thinner than 40 mm, such as sheet-like products with regular geometric area
21 8.3.4 Test pieces with partly irregular side face
8.3.5 Irregular test pieces without any regular sides
22 9 Test procedure
9.1 Testing conditions
9.2 Step 1 of the leaching procedure
23 9.3 Steps 2-8 of the leaching procedure
24 9.4 Measuring the loss of weight
9.5 Further preparation of the eluates for analysis and analysis steps
25 9.6 Blank test
10 Evaluation of measurement results
10.1 Expression of results in concentrations
10.2 Expression of results in terms of area related release
26 10.3 Calculation of release mechanism
10.4 Calculating the loss of weight
27 11 Documentation and test report
28 12 Test performance
13 Indirect methods
13.1 Definition
29 13.2 Provisions
13.3 Examples of indirect methods
30 Annex A (informative)Method for granular construction products with low hydraulic conductivity (GLHC)
A.1 Scope
A.2 Terms, definitions and abbreviations
A.3 Principle
A.4 Equipment
A.4.1 General
A.4.2 Sealable outer vessel with cylindrical inner vessel
31 A.4.3 Glass beads
32 A.5 Sampling
A.6 Procedure
A.6.1 Testing conditions
33 A.6.2 Step 1 of the leaching procedure
34 A.6.3 Steps 2 ā€“ 8 of the leaching procedure
35 A.7 Data handling and reporting
36 Annex B (informative)Assessment of release mechanisms (if required)
B.1 Overview of release mechanisms
37 B.2 Procedure of identification of release mechanisms
38 B.3 Concentrations close to the limit of quantification
B.3.1 Overall low concentrations
39 B.3.2 Surface wash-off followed by low concentrations
40 B.4 Diffusion controlled release of a substance
B.4.1 Identification of diffusion controlled release
41 B.4.2 Surface wash-off preceding diffusion-controlled release
B.4.3 Diffusion-controlled release followed by depletion
42 B.4.4 Surface wash-off preceding diffusion-controlled release followed by depletion
B.5 Dissolution controlled release of a substance
43 B.6 Other release mechanism
B.6.1 Unidentified release mechanism
B.6.2 Surface wash-off of a substance
44 B.6.3 Depletion of a substance
45 B.6.4 Surface wash-off and depletion
B.7 Calculation of release
B.7.1 Area release
B.7.2 Surface wash-off
B.7.3 Release in the case of dissolution
B.7.4 Extrapolation of the cumulative area release for larger time values
46 B.8 Examples
B.8.1 General
47 B.8.2 EXAMPLE 1 Surface wash-off preceding diffusion-controlled release
50 B.8.3 EXAMPLE 2 Surface wash-off followed by low concentrations
54 B.8.4 EXAMPLE 3 Diffusion controlled release
58 B.8.5 EXAMPLE 4 Dissolution controlled release
62 B.9 Interpretation of shortened DSL tests for FPC
65 Annex C (informative)Examples of the test set up for construction products (DSLT)
66 Annex D (informative)Examples of data about the L/A ratio
67 Annex E (informative)Summary of cumulative results EN 16637-2 (64 days)
E.1 Repeatability and reproducibility limits
68 E.2 Inorganic substances
70 E.3 Organic substances
72 Annex F (informative)Uncertainty in surface measurements with the aluminium foil method

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BS EN 16637-2:2023
$215.11