Moisture and Bio-Deterioration Risk of Building Materials and Structures

Viitanen, Hannu; Vinha, Juha; Salminen, Kati; Ojanen, Tuomo; Peuhkuri, Ruut Hannele; Paajanen, Leena; Lähdesmäki, Kimmo

doi:10.5772/21184

Cited by 68 publications

(92 citation statements)

References 3 publications

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“…Lower limiting humidity level (LIM) shows the critical conditions for mould growth, see Fig. 5b, d, f, thicker solid line (Viitanen et al 2011). Below LIM there is no biological activity.…”

Section: Moisture Risks In the Multi-layared Walls During A Longer Timentioning

confidence: 99%

“…The influence of relative humidity and temperature on mould growth, on several microfungi and mycelium in different types of building materials was investigated in (Isaksson, Thelandersson, Extrand-Tobin, Johansson 2010;Thelandersson, Isaksson 2013;Viitanen et al 2011;Sedlbauer, Krus, Zillig, Kunzel 2001;Johansson, Bok, Ekstrand-Tobin 2013;Nielsen, Holm, Uttrup, Nielsen 2004;Johansson, P., Extrand-Tobin, Svensson, Bok 2012). Paper (Mundt-Petersen, Wallenten, Toratti, Heikkinen 2012) presents folos 2D visual mould chart taken int account t the influence of duration on mould growth and decline of mould growththat illustrates how it is possible to use the known models of mould growth in the practical moisture safety design processes.…”

Section: Introductionmentioning

confidence: 99%

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Risks of mould growth in different building structures

Ozolins

Jakovičs

2014

Proceedings of the International Conference „Innovative Materials, Structures and Technologies”

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Abstract. In the current paper the impact of real Latvian climate conditions on a variety of building constructions is inspected. The influence of the humidity on buildings' sustainability in three different building units has been appraised. Condensate risks in a multi-layer wall are analyzed by transient outdoor climatic conditions. Risks of mould growth are discussed in detail taking into account the properties of building materials, dependence of humidity on temperature and season. The effect of vapour barrier is analyzed from several aspects. Theoretical analysis has been done based on real test stands built in Riga. Some experimental results are obtained.

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“…Lower limiting humidity level (LIM) shows the critical conditions for mould growth, see Fig. 5b, d, f, thicker solid line (Viitanen et al 2011). Below LIM there is no biological activity.…”

Section: Moisture Risks In the Multi-layared Walls During A Longer Timentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Risks of mould growth in different building structures

Ozolins

Jakovičs

2014

Proceedings of the International Conference „Innovative Materials, Structures and Technologies”

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“…This development is possible whenever microorganisms have enough water. Fungal species most commonly isolated belong to the Penicillium, Aspergillus and Cladosporium types [91]. Colonisation of fungi and degrees of alteration depend on various factors such as support (nature, physicochemical properties, surface, water content, pH), microorganisms and environmental conditions [91].…”

Section: Durability Of Bio-based Materialsmentioning

confidence: 99%

Overview on Biobased Building Material made with plant aggregate

Amziane

Sonebi

2016

RILEM Tech Lett

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Global warming, energy savings, and life cycle analysis issues are factors that have contributed to the rapid expansion of plant-based materials for buildings, which can be qualified as environmental-friendly, sustainable and efficient multifunctional materials. This review presents an overview on the several possibilities developed worldwide about the use of plant aggregate to design bio-based building materials. The use of crushed vegetal aggregates such as hemp (shiv), flax, coconut shells and other plants associated to mineral binder represents the most popular solution adopted in the beginning of this revolution in building materials. Vegetal aggregates are generally highly porous with a low apparent density and a complex architecture marked by a multi-scale porosity. These geometrical characteristics result in a high capacity to absorb sounds and have hygro-thermal transfer ability. This is one of the essential characteristics which differ of vegetal concrete compared to the tradition mineral-based concretes. In addition, the high flexibility of the aggregates leads to a non-fragile elasto-plastic behavior and a high deformability under stress, lack of fracturing and marked ductility with absorbance of the strains ever after having reached the maximum mechanical strength. Due to the sensitivity to moisture, the assessment of the durability of vegetal concrete constitutes one of the next scientific challenging of bio-based building materials.

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“…Andersen et al (2017) evaluated gypsum wallboard for fungal growth and determined that S. chartarum spores might be within the paper/cardboard surrounding the gypsum during manufacturing. Building materials made of stone, such as concrete and brick, support lower levels of mold; however, the dust on these building materials can provide a nutrient source (Viitanen et al 2010). The detection of mold within water damaged building materials was performed by Došen et al (2016), who found S. chartarum mycotoxins from both chemotypes, S and A, within dust using an ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC) method.…”

Section: Introductionmentioning

confidence: 99%

Mycotoxin Production by Stachybotrys chartarum on Water-Damaged Building Materials

2017

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The major question after a flooding event is whether to remove or remediate the building materials so that potentially harmful mold growth and their by-products cannot cause serious health problems for susceptible individuals. The purpose of this study was to determine the growth of Stachybotrys chartarum and corresponding production of macrocyclic trichothecenes on different components of a residential wall up to 65 days after a simulated flood event. Small-scale residential walls constructed of fiberglass batt insulation, oriented strandboard, gypsum wallboard, and lumber were destructively sampled at four time points. All four building materials contained notable levels of macrocyclic trichothecenes on all collection days. The highest concentrations of macrocyclic trichothecenes were on the paper siding of the gypsum wallboard, followed by the paper siding of the batt insulation and wood lumber. There was a significant increase in trichothecene concentration over time, particularly on the gypsum. The DNA concentrations of the mold were significantly higher on the batt insulation than on the wood products, and the mold concentrations also increased over time on the batt insulation and gypsum, but not on the wood products. It was concluded that if a flooding event should occur, the insulation and gypsum should be removed from the home and the remaining materials should be remediated.

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Moisture and Bio-Deterioration Risk of Building Materials and Structures

Cited by 68 publications

References 3 publications

Risks of mould growth in different building structures

Risks of mould growth in different building structures

Overview on Biobased Building Material made with plant aggregate

Mycotoxin Production by Stachybotrys chartarum on Water-Damaged Building Materials

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