The Influence of Clay Structures to the Hygrothermal Component of the Indoor Environment.

Jakub Diviš,Jan Růžička

doi:10.3390/ma15051744

Jakub Diviš, Jan Růžička

Open Access

https://doi.org/10.3390/ma15051744

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Abstract

In this article, research on the sorption properties of clay materials in comparison with commonly used building materials is published. The topic is mainly focused on the dynamic sorption properties and their influence on the relative humidity in the indoor environment. The results of comparisons of clay structures, rammed earth panels, clay plaster, and unburned bricks, with commonly used building materials, concrete, lime plaster, and gypsum board are examined. Statistically evaluated results in the form of confidence intervals are presented and the rate of dynamic sorption is analyzed. It is clear from the results that clay materials have a positive effect on the rapid adsorption and desorption of air moisture in the interior of buildings. However, there are many variables, band not every clay material has such excellent sorption properties.

Highlights

It is clear that the value of relative humidity in the interior plays an important role in Indoor air quality (IAQ)
It should be noted that relative humidity can be regulated, without any operating energy, by choosing suitable building structures and structural materials with moisture buffering properties
The results clearly show that the higher amount of clay minerals in the clay materials, the higher the absorption capacity of the materials

Summary

Introduction

People spend almost 90% of their time in residential buildings, kindergartens, schools, offices, and other building facilities [1]. For this reason, it is necessary to focus more on the quality of the indoor environment. Indoor air quality (IAQ) depends on many factors: outdoor air quality, amount of air pollutants, ventilation air volume, and ventilation system. The air quality in buildings is worse than the air quality in the outdoor environment. Deteriorated ambient air quality is primarily the result of energy consumption in transportation and industry and in building construction. Pollutants associated with the operation of buildings account for approximately 40% of total pollutant production, of which ventilation accounts for up to 50% [2]

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