Mould Resistance of Paper Plaster Made from Cellulose-Containing Waste

The objective of this study was to determine mould resistance of the plaster made from waste paper. To study the plaster quality, two laboratory tests were conducted. First, mould resistance of a dry plaster was studied, and second, mould resistance of a wet plaster was tested. Since wet plaster mix must be used for plastering, the resulting surfaces are extremely wet. The plaster placed on the wall would dry for at least two weeks under favourable conditions (sufficient ventilation and temperature). During this period, there is a great risk that the plaster might become mouldy. Another risk of becoming mouldy occurs when an already plastered wall receives moisture (e.g., water damage). The experiments carried out under laboratory conditions showed that in an environment with high relative humidity the plaster did not become mouldy.