Estimating the hydratable surface area of building materials from water vapour sorption

K. M. Frandsen*, J. V. Lennert, R. L. Jensen, P. Møldrup

*Corresponding author for this work

Research output: Contribution to journalConference article in JournalResearchpeer-review

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The specific surface area of a building material controls its physical, chemical, and biological functions and services, including its moisture regulating potential. The Hydratable Specific Surface Area (H-SSA) of a building material can be estimated from its primary water vapour adsorption and desorption isotherm at a given relative humidity (RH) value or range of RH. The concept is illustrated for 12 mineral and bio-based building materials. The estimated H-SSA for only 1 kg of some building materials can approach the area of a typical agricultural field (500,000 m2, 50 ha.), which helps explain and illustrate the great moisture regulating properties of many bio-based materials. The H-SSA appears useful to help characterize and classify building materials.

Original languageEnglish
Article number012046
Book seriesJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2023
Event13th Nordic Symposium on Building Physics, NSB 2023 - Aalborg University - CREATE, Aalborg, Denmark
Duration: 12 Jun 202314 Jun 2023
Conference number: 13


Conference13th Nordic Symposium on Building Physics, NSB 2023
LocationAalborg University - CREATE
SponsorAirmaster , COMSOL, RAMCON, Realdania, Velux, WOODSENSE, RAMCON A/S, Comsol AB
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© Published under licence by IOP Publishing Ltd.


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