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BS EN ISO 12571:2021

BS EN ISO 12571:2021

$142.49

Hygrothermal performance of building materials and products – Determination of hygroscopic sorption properties

Published By Publication Date Number of Pages
BSI 2021 26
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This document specifies two alternative methods for determining hygroscopic sorption properties of porous building materials and products:

  1. using desiccators and weighing cups (desiccator method);

  2. using a climatic chamber (climatic chamber method).

The desiccator method is the reference method.

This document does not specify the method for sampling.

The methods specified in this document can be used to determine the moisture content of a sample in equilibrium with air at a specific temperature and humidity.

PDF Catalog

PDF Pages PDF Title
2 National foreword
4 European foreword
6 Foreword
7 1 Scope
2 Normative references
3 Terms and definitions, symbols and units
3.1 Terms and definitions
8 3.2 Symbols and units
4 Principle
4.1 Sorption curve
4.2 Desorption curve
9 5 Apparatus
5.1 Desiccator method
5.2 Climatic chamber method
6 Test specimens
6.1 Specification of the test specimens
6.2 Number of test specimens
7 Procedure
7.1 Test conditions
10 7.2 Desiccator method
7.2.1 General
7.2.2 Sorption curve
11 7.2.3 Desorption curve
12 7.3 Climatic chamber method
7.3.1 Sorption curve
13 7.3.2 Desorption curve
8 Calculation and expression of results
8.1 Hygroscopic sorption
8.2 Equilibrium moisture content curves
14 9 Accuracy of measurement
9.1 Error in moisture content
9.2 Control of environmental conditions
9.2.1 Desiccator method
15 9.2.2 Climatic chamber method
10 Test report
16 Annex A (informative) Air relative humidities above saturated solutions in equilibrium
19 Annex B (informative) Preparation of saturated solutions
22 Annex C (informative) Example of the procedure for determining a point on a sorption curve
23 Annex D (informative) Method using a glass jar
25 Bibliography

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BS EN ISO 12571:2021
$142.49