Evaluation of the consolidant efficiency of nanosilica based products on Neapolitan Yellow Tuff

2016 ◽  
Vol 38 ◽  
pp. 93-96
Author(s):  
Natalia Rovella ◽  
Silvestro A. A. Ruffolo ◽  
Andrea Macchia ◽  
Cristina Maria Maria Belfiore
Keyword(s):  
Neapolitan Yellow Tuff

scholarly journals On the occurrence of the Neapolitan Yellow Tuff tephra in the Northern Phlegraean Fields offshore (Eastern Tyrrhenian margin; Italy)

2017 ◽  
Vol 136 (2) ◽  
pp. 263-274 ◽  
Author(s):  
Gemma Aiello ◽  
Donatella Domenica Insinga ◽  
Marina Iorio ◽  
Agostino Meo ◽  
Maria Rosaria Senatore
Keyword(s):  
Phlegraean Fields ◽  
Neapolitan Yellow Tuff

scholarly journals Magma chamber evolution prior to the Campanian Ignimbrite and Neapolitan Yellow Tuff eruptions (Campi Flegrei, Italy)

2007 ◽  
Vol 70 (8) ◽  
pp. 961-976 ◽  
Author(s):  
Sonja Pabst ◽  
Gerhard Wörner ◽  
Lucia Civetta ◽  
Roberto Tesoro
Keyword(s):  
Magma Chamber ◽  
Campi Flegrei ◽  
Campanian Ignimbrite ◽  
Neapolitan Yellow Tuff

scholarly journals The permeability and elastic moduli of tuff from Campi Flegrei, Italy: implications for ground deformation modelling

Solid Earth ◽  
2014 ◽  
Vol 5 (1) ◽  
pp. 25-44 ◽  
Author(s):  
M. J. Heap ◽  
P. Baud ◽  
P. G. Meredith ◽  
S. Vinciguerra ◽  
T. Reuschlé
Keyword(s):  
Ultrasonic Wave ◽  
Elastic Moduli ◽  
Ground Deformation ◽  
Laboratory Data ◽  
Campi Flegrei ◽  
Pore Collapse ◽  
Campanian Ignimbrite ◽  
Wave Velocities ◽  
Neapolitan Yellow Tuff ◽  
Dynamic Elastic Moduli

Abstract. The accuracy of ground deformation modelling at active volcanoes is a principal requirement in volcanic hazard mitigation. However, the reliability of such models relies on the accuracy of the rock physical property (permeability and elastic moduli) input parameters. Unfortunately, laboratory-derived values on representative rocks are usually rare. To this end we have performed a systematic laboratory study on the influence of pressure and temperature on the permeability and elastic moduli of samples from the two most widespread lithified pyroclastic deposits at the Campi Flegrei volcanic district, Italy. Our data show that the water permeability of Neapolitan Yellow Tuff and a tuff from the Campanian Ignimbrite differ by about 1.5 orders of magnitude. As pressure (depth) increases beyond the critical point for inelastic pore collapse (at an effective pressure of 10–15 MPa, or a depth of about 750 m), permeability and porosity decrease significantly, and ultrasonic wave velocities and dynamic elastic moduli increase significantly. Increasing the thermal stressing temperature increases the permeability and decreases the ultrasonic wave velocities and dynamic elastic moduli of the Neapolitan Yellow Tuff; whereas the tuff from the Campanian Ignimbrite remains unaffected. This difference is due to the presence of thermally unstable zeolites within the Neapolitan Yellow Tuff. For both rocks we also find, under the same pressure conditions, that the dynamic (calculated from ultrasonic wave velocities) and static (calculated from triaxial stress-strain data) elastic moduli differ significantly. The choice of elastic moduli in ground deformation modelling is therefore an important consideration. While we urge that these new laboratory data should be considered in routine ground deformation modelling, we highlight the challenges for ground deformation modelling based on the heterogeneous nature (vertically and laterally) of the rocks that comprise the caldera at Campi Flegrei.

Step-filling and development of a three-layer magma chamber: the Neapolitan Yellow Tuff case history

1995 ◽  
Vol 67 (4) ◽  
pp. 291-312 ◽  
Author(s):  
G. Orsi ◽  
L. Civetta ◽  
M. D'Antonio ◽  
P. Di Girolamo ◽  
M. Piochi
Keyword(s):  
Magma Chamber ◽  
Case History ◽  
Neapolitan Yellow Tuff

scholarly journals The Neapolitan Yellow Tuff caldera offshore the Campi Flegrei: Stratal architecture and kinematic reconstruction during the last 15ky

2014 ◽  
Vol 354 ◽  
pp. 15-33 ◽  
Author(s):  
M. Sacchi ◽  
F. Pepe ◽  
M. Corradino ◽  
D.D. Insinga ◽  
F. Molisso ◽  
...  
Keyword(s):  
Campi Flegrei ◽  
Neapolitan Yellow Tuff ◽  
Stratal Architecture

Neapolitan Yellow Tuff as raw material for lightweight aggregates in lightweight structural concrete production

2005 ◽  
Vol 28 (1-4) ◽  
pp. 309-319 ◽  
Author(s):  
R. de Gennaro ◽  
P. Cappelletti ◽  
G. Cerri ◽  
M. de'Gennaro ◽  
M. Dondi ◽  
...  
Keyword(s):  
Raw Material ◽  
Lightweight Aggregates ◽  
Structural Concrete ◽  
Neapolitan Yellow Tuff ◽  
Concrete Production

scholarly journals Humic acid sorption properties of calcium-rich derivatives of Neapolitan Yellow Tuff

2008 ◽  
Author(s):  
E. Coppola ◽  
P. Iovino ◽  
S. Salvestrini ◽  
S. Capasso ◽  
C. Colella
Keyword(s):  
Humic Acid ◽  
Sorption Properties ◽  
Neapolitan Yellow Tuff ◽  
Derivatives Of

Vent area and depositional mechanisms of the Upper Member of the Neapolitan Yellow Tuff (Campi Flegrei, Italy): new insights from directional fabric through image analysis

2008 ◽  
Vol 70 (9) ◽  
pp. 1087-1101 ◽  
Author(s):  
Laura Valentini ◽  
Bruno Capaccioni ◽  
Piermaria Luigi Rossi ◽  
Roberto Scandone ◽  
Damiano Sarocchi
Keyword(s):  
Image Analysis ◽  
Campi Flegrei ◽  
Neapolitan Yellow Tuff
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