Microbial growth on concrete: Moisture and alkalinity

Student thesis: Master programme thesis

  • Bjarne Pustelnik
4. term, Master of Building Physics (Continuing Education Programme (Master))
Many construction damage is caused by moisture, but do we learn from our mistakes or is it business as usual? In a literature study, I will take a closer look at the distribution of building damage and assess the proportion of moisture-related building damage. On the basis of a number of case studies, dehumidification times of inorganic materials in new construction, eg EPS concrete and ordinary concrete, are investigated. Moisture conditions are also one of the most important factors for mold growth, but they are typically assessed for organic material such as wood, but from several projects, mold has also been registered on inorganic materials. The risk of mold growth on newly produced alkaline building materials with building moisture generally seems underestimated, and the project will examine the current knowledge in relation to moisture criteria for mold growth for alkaline and inorganic building materials. Dehumidification times and the growth risk for a number of constructions are assessed with the simulation tool WUFI combined with mathematical mold models. The project is expected to include validation experiments from the case studies to see if calculated dehumidification times harmonize with reality. Finally, a proposal for moisture documentation of inorganic materials will be presented to meet the building regulations' requirements for built-in moisture.
Publication date2020
Number of pages48
ID: 393570978