Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The biodegradation of a biopolymeric additive in building materials
Abstract A summary is given of a series of studies performed in order to explain one cause of bad odour and spoilage of floor covering materials (‘sick building syndrome’). Bad odours as well as spoilage of floor covering materials, i.e. blackening etc., inside buildings with self-levelling concrete containing casein are due to the biodegradation of the protein molecule by different species ofClostridia, which have adapted themselves to the extreme environment, i.e. a high pH and a relatively low temperature (pH 12 and 17°C). These new characteristics ofClostridia make it possible, under these extreme conditions, for theClostridia to degrade the casein molecule to volatile organic acids and monoamines. Organic acids such as propionic acid, butyric acid etc, and monoamines such as triethylamine, di-iso-butylamine etc. have been detected in biodegraded concrete. The monoamines are odorous and contribute strongly to the bad odour experienced inside some buildings constructed between 1979 and 1982. The acids are chemically bound in the concrete and can therefore not be observed as bad odour. A simulation of the biodegradative attack on concrete showed that the same acids were produced in the laboratory (in vitro) as the one detected in the floor covered with concrete.
The biodegradation of a biopolymeric additive in building materials
Abstract A summary is given of a series of studies performed in order to explain one cause of bad odour and spoilage of floor covering materials (‘sick building syndrome’). Bad odours as well as spoilage of floor covering materials, i.e. blackening etc., inside buildings with self-levelling concrete containing casein are due to the biodegradation of the protein molecule by different species ofClostridia, which have adapted themselves to the extreme environment, i.e. a high pH and a relatively low temperature (pH 12 and 17°C). These new characteristics ofClostridia make it possible, under these extreme conditions, for theClostridia to degrade the casein molecule to volatile organic acids and monoamines. Organic acids such as propionic acid, butyric acid etc, and monoamines such as triethylamine, di-iso-butylamine etc. have been detected in biodegraded concrete. The monoamines are odorous and contribute strongly to the bad odour experienced inside some buildings constructed between 1979 and 1982. The acids are chemically bound in the concrete and can therefore not be observed as bad odour. A simulation of the biodegradative attack on concrete showed that the same acids were produced in the laboratory (in vitro) as the one detected in the floor covered with concrete.
The biodegradation of a biopolymeric additive in building materials
Karlsson, Sigbritt (Autor:in) / Albertsson, Ann-Christine (Autor:in)
1990
Aufsatz (Zeitschrift)
Englisch
The biodegradation of a biopolymeric additive in building materials
| Springer Verlag | 1990
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