ISO 12571:2021 PDF

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

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Title (English):

ISO 12571:2021

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

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 19
Publication date:: November 8, 2021
Edition:: ISO IS 12571 edition 3 version 1
ICS:: 91.100.01

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Description (English):

This document specifies two alternative methods for determining hygroscopic sorption properties of porous building materials and products: a) using desiccators and weighing cups (desiccator method); b) 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.

Technical details

Technical committee: ISO/TC 163/SC 1 - Test and measurement methods
SKU: ISO 12571:2021

Abstract

Overview

ISO 12571:2021 specifies laboratory methods to determine the hygroscopic sorption properties of porous building materials and products - key input for hygrothermal performance assessment and moisture modelling. The standard defines two alternative test routes: the desiccator method (reference method) and the climatic chamber method, both used to measure a specimen’s equilibrium moisture content at specified temperature and relative humidity conditions. Sampling is not covered by the standard.

Key Topics and Requirements

Two test methods
- Desiccator method (reference): uses saturated salt solutions in desiccators to establish stable relative humidities.
- Climatic chamber method: uses a controlled chamber to set RH and temperature across the test area.
Test conditions
- Reference temperatures: 23 ± 0.5 °C (or 27 ± 0.5 °C for tropical climates).
- Desiccator RH control: ±2% RH; climatic chamber: ±5% RH and ±2 K temperature uniformity.
Apparatus & accuracy
- Balance accuracy: ±0.01% of specimen mass.
- Drying oven per ISO 12570 for determination of dry mass.
Specimens
- Minimum mass 10 g; low-density materials (

Related standards

Mentioned in the description and other ISO standards

Overview

Key Topics and Requirements

Two test methods
- Desiccator method (reference): uses saturated salt solutions in desiccators to establish stable relative humidities.
- Climatic chamber method: uses a controlled chamber to set RH and temperature across the test area.
Test conditions
- Reference temperatures: 23 ± 0.5 °C (or 27 ± 0.5 °C for tropical climates).
- Desiccator RH control: ±2% RH; climatic chamber: ±5% RH and ±2 K temperature uniformity.
Apparatus & accuracy
- Balance accuracy: ±0.01% of specimen mass.
- Drying oven per ISO 12570 for determination of dry mass.
Specimens
- Minimum mass 10 g; low-density materials (

ISO 12571:2021 PDF

Technical details

Abstract

Overview

Key Topics and Requirements

Related standards

Abstract

Overview

Key Topics and Requirements

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