Petrophysical Properties of Limestones - Influence On Behaviour Under Different Environmental Conditions And Applications

Abstract

Limestones have wide variety, namely by differences in the process of formation, mineralogical composition, grain size and texture. Such variability leads to differences in weathering characteristics and behaviour under different environmental conditions and applications. Therefore, detailed studies are mandatory to assess the main factors controlling the physical-mechanical properties and the durability to propose the best applications for the limestones. This study presents the petrographic and petrophysical data of eleven selected Portuguese limestones. Texture, mineralogy and porosity were identified as key parameters for the durability of limestones. Two main groups were identified regarding the texture/petrography and weathering resistance; the compact micritic limestones and with the sparitic grainstones. For the first time an outstanding bowing behaviour was identified in a limestone, probably related with clay swelling minerals and iron oxides present in the micrite groundmass around or in the stylolitic planes.