Faculty of Mining, Geology and Petroleum Engineering University of Zagreb
Abstract
Urban, environmental pollution, caused by acid rains and damages of stone elements on Cathedral of Zagreb are described. On the surfaces of limestone elements that are in the »shade«, the black scabs have developed. The outher crusts, and inner powdery matter of the black scabs have been investigated by microscopy, and analyzed by means of x-ray. thermal and chemical analyses. They contain gypsum, calcite, soot, and sporadic fly ash.Opisani su zagađenje urbanog okoliša, sastojci kisele kiše i oštećenja kamenih elemenata galerije zagrebačke katedrale. Na površini vapnenačkih elemenata koji su u »sjeni« nastale su crne kraste. Vanjske kore i unutarnja praškasta tvar crnih krasta analizirane su mikroskopski, rendgenski, termički i kemijski. Sadrže gips, kalcit, čadu i ponekad lebdeći pepeo
