Few scientific works deal with size effect on mechanical resistance in the case of stone, meanwhile for the concrete, Weibull law has been widely verified. In fact, the stone size effect is not always ruled by well known laws as Weibull because of the intrinsic complex structure and features of the materials analysed. Concerning the mechanical behaviour, flexural strength is used to assess the mechanical resistance of stone and, if performed after accelerating tests, its durability. Besides, the results of flexural strength are well correlated with petrographic properties of stone. For this reason, to further investigate the size effect, this research analyses the variation of mechanical resistance with the shape and/or dimensions of the specimens taking into account the petrographic characteristics of different kinds of rock (voids, porosity, cracks, crystal contacts). Flexural strength measurements on specimens in natural condition and on specimens subjected to artificial ageing cycles, microscopic observations, image analysis, porosity measurements have been executed in order to evaluate the effects of rock characteristics on the micro-scale on mechanical strength test. The results of the tests performed, analysing not only mechanical properties but even petrographic characteristics, can be useful to better explain the rock mechanical behaviour in function of dimensions and micro-scale properties.

The mechanical resistance of stone for different size specimens: the effect of petrographic characteristics / Bellopede, Rossana; Marini, Paola; Mucci, A.. - STAMPA. - 1:(2014), pp. 144-144. (Intervento presentato al convegno V Global Stone Congress tenutosi a Antalya nel 22-25 ottobre 2014).

The mechanical resistance of stone for different size specimens: the effect of petrographic characteristics

BELLOPEDE, ROSSANA;MARINI, PAOLA;
2014

Abstract

Few scientific works deal with size effect on mechanical resistance in the case of stone, meanwhile for the concrete, Weibull law has been widely verified. In fact, the stone size effect is not always ruled by well known laws as Weibull because of the intrinsic complex structure and features of the materials analysed. Concerning the mechanical behaviour, flexural strength is used to assess the mechanical resistance of stone and, if performed after accelerating tests, its durability. Besides, the results of flexural strength are well correlated with petrographic properties of stone. For this reason, to further investigate the size effect, this research analyses the variation of mechanical resistance with the shape and/or dimensions of the specimens taking into account the petrographic characteristics of different kinds of rock (voids, porosity, cracks, crystal contacts). Flexural strength measurements on specimens in natural condition and on specimens subjected to artificial ageing cycles, microscopic observations, image analysis, porosity measurements have been executed in order to evaluate the effects of rock characteristics on the micro-scale on mechanical strength test. The results of the tests performed, analysing not only mechanical properties but even petrographic characteristics, can be useful to better explain the rock mechanical behaviour in function of dimensions and micro-scale properties.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2572561
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo