Entwicklung eines Modells zur Bewertung der Umwelteigenschaften üblicher Putze und Mörtel.

Development of a model to evaluate the environmental properties of common outdoor plasters and mortars A requirement of the Construction Products Regulation (CPR) in the European Union states that construction materials and works must be designed in a way that throughout their entire life cycle, they have no exceedingly high negative impact on the environment. The objective of the current work was to develop a model capable to evaluate the environmental properties of outdoor plasters and mortars. Therefore, the extensive database recollected during 10 years of field and laboratory experiments by Fraunhofer IBP for these products was used as a basis and for validation, respectively. A three‐stage model was set up. In "Level 1", runoff volumes are calculated for a specific façade. In "Level 2", leached inorganic substances and their concentrations in runoff water are identified. As a final step, the evaluation of the environmental risk of stormwater runoff from façades covered with plasters and mortars takes place in "Level 3" using a groundwater risk assessment including leachate prognosis. It could be shown that vanadium, chromium and lead can be leached from mineral plasters and mortars during rain events in relevant concentrations. However, the evaluation showed that within usual application scenarios threshold values at a defined point of compliance are not expected to be exceeded. [ABSTRACT FROM AUTHOR]