The degradation and decay of natural stones used for buildings and monuments is the result of the mutual interaction between the weathering agents and the physical and mechanical properties of the stones. Natural ageing conditions can be simulated in laboratory, so that the action of each weathering agent can be connected with the increase of the decay of the stone. Frost action on stone is generally considered one of the more disruptive factor, responsible of several types of damage (e.g. exfoliations and crackings). Frost action can be simulated in laboratory by submitting stone specimens to subsequent freeze-thaw cycles. The stones investigated are two marbles from Carrara area (Italy) and a German sandstone. These stones were part of European Project McDUR (“Effects of the Weathering on Stone Materials: Assessment of their Mechanical Durability” - Contract no. G6RD-CT-2000-00266). Methodologies used to evaluate the decay of the stone are two NDT method like ultrasound pulse velocity and the determinations of water absorption at atmospheric pressure. Both these parameters are useful to evaluate the decay of the stone, because they are closely related with the increasing of weathering degree.

Water absorption and ultrasound pulse velocity to evaluate the decay of stones / Bellopede, Rossana; DE REGIBUS, Claudio; Manfredotti, Lucia; Marini, Paola. - ELETTRONICO. - (2005), pp. 1-11. ((Intervento presentato al convegno 8 th International Conference on “Non-Destructive Investigations and Microanalysis for the Diagnostics and Conservation of the Cultural and Environmental Heritage” tenutosi a Lecce nel 15-19 Maggio 2005.

Water absorption and ultrasound pulse velocity to evaluate the decay of stones

BELLOPEDE, ROSSANA;DE REGIBUS, CLAUDIO;MANFREDOTTI, Lucia;MARINI, PAOLA
2005

Abstract

The degradation and decay of natural stones used for buildings and monuments is the result of the mutual interaction between the weathering agents and the physical and mechanical properties of the stones. Natural ageing conditions can be simulated in laboratory, so that the action of each weathering agent can be connected with the increase of the decay of the stone. Frost action on stone is generally considered one of the more disruptive factor, responsible of several types of damage (e.g. exfoliations and crackings). Frost action can be simulated in laboratory by submitting stone specimens to subsequent freeze-thaw cycles. The stones investigated are two marbles from Carrara area (Italy) and a German sandstone. These stones were part of European Project McDUR (“Effects of the Weathering on Stone Materials: Assessment of their Mechanical Durability” - Contract no. G6RD-CT-2000-00266). Methodologies used to evaluate the decay of the stone are two NDT method like ultrasound pulse velocity and the determinations of water absorption at atmospheric pressure. Both these parameters are useful to evaluate the decay of the stone, because they are closely related with the increasing of weathering degree.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2499344
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