Laboratory corrosion experiments and analysis of naturally weathered material were performed in order to study the relationships between lithology and weathering in Scaglia limestone. The obtained results evidence that grain size and porosity are the main textural features influencing the durability of the limestone through their direct effect on the chemical reactivity and mechanical resistence of the material. In particular, the small grain and pore size greatly enhance the chemical reactivity of the limestone, but result in relatively lower extents of sulfation attained. In addition, the low amount of total porosity accounts for the observed low extent of chemical processes related to water circulation in the open porosity, such as iron mobilization in the femic accessory phases, dissolution and sulfation. Therefore the material shows a good resistance to ambient weathering and only gentle treatments are necessary to restore the original properties.
Lithology and weathering of scaglia limestone
MORONI, Beatrice;POLI, Giampiero
1996
Abstract
Laboratory corrosion experiments and analysis of naturally weathered material were performed in order to study the relationships between lithology and weathering in Scaglia limestone. The obtained results evidence that grain size and porosity are the main textural features influencing the durability of the limestone through their direct effect on the chemical reactivity and mechanical resistence of the material. In particular, the small grain and pore size greatly enhance the chemical reactivity of the limestone, but result in relatively lower extents of sulfation attained. In addition, the low amount of total porosity accounts for the observed low extent of chemical processes related to water circulation in the open porosity, such as iron mobilization in the femic accessory phases, dissolution and sulfation. Therefore the material shows a good resistance to ambient weathering and only gentle treatments are necessary to restore the original properties.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.