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  • Damage to quartz sandstones in polluted urban environments is frequently associated with the presence of calcium salts, especially gypsum. The aim of this study is to examine the possibility that non-calcareous quartz sandstones can be loaded
  • 2001
  • how weathering has significantly altered the mineralogy. Preliminary results suggest that the occurrence of gypsum throughout the stone blocks is related to chemical reactions between a pore-filling mineral, actinolite, and sulphur oxides from urban
  • 2001