This paper presents the results of an experimental investigation of the mechanical behaviour of a pyroclastic soft rock, locally known as Pozzolana Nera, from the volcanic complex of the Colli Albani (Roma). The laboratory testing programme consisted of standard drained and undrained triaxial compression tests, at increasing values of cell pressure. One-dimensional compression tests were also carried out in oedometers with reduced cross-section. The testing programme made it possible to investigate the full range of behaviour of the material from contractant to dilatant. Attention was focused on assessing the influence of natural microstructure on the shear strength parameters. The stress-dilatancy curves in triaxial compression were examined in an attempt to isolate the dilatancy component and the bonding component of peak strength.

Cecconi, M., Viggiani, G., Rampello, S. (1998). An experimental investigation of the mechanical behaviour of a pyroclastic soft rock. In Geotechnics of hard soils - soft rocks, vol 1 (pp.473-482). LEIDEN : A.A. Balkema.

An experimental investigation of the mechanical behaviour of a pyroclastic soft rock

VIGGIANI, GIULIA;
1998-01-01

Abstract

This paper presents the results of an experimental investigation of the mechanical behaviour of a pyroclastic soft rock, locally known as Pozzolana Nera, from the volcanic complex of the Colli Albani (Roma). The laboratory testing programme consisted of standard drained and undrained triaxial compression tests, at increasing values of cell pressure. One-dimensional compression tests were also carried out in oedometers with reduced cross-section. The testing programme made it possible to investigate the full range of behaviour of the material from contractant to dilatant. Attention was focused on assessing the influence of natural microstructure on the shear strength parameters. The stress-dilatancy curves in triaxial compression were examined in an attempt to isolate the dilatancy component and the bonding component of peak strength.
2nd International symposium on hard soils - soft rocks
Naples
oct 12-14, 1998
Assoc Geotecn Italiana
Rilevanza internazionale
contributo
1998
Settore ICAR/07 - GEOTECNICA
English
conference proceedings; geotechnical property; mechanical property; pyroclastic deposit; soft rock
Intervento a convegno
Cecconi, M., Viggiani, G., Rampello, S. (1998). An experimental investigation of the mechanical behaviour of a pyroclastic soft rock. In Geotechnics of hard soils - soft rocks, vol 1 (pp.473-482). LEIDEN : A.A. Balkema.
Cecconi, M; Viggiani, G; Rampello, S
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/27368
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