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In order to investigate the mechanical behaviour of the typical ancient rubble stone 

masonry type at the archaeological Pompeii site, an experimental program was carried out on 

masonry  panels  realized  with  the  aim  of  reproducing  the  ancient  technique  opus  incertum. 

Three panels (1.20m x 1.20m x 0.45m) were realized by using original rock units from ruins 

emerged  in  the  excavation  works  at  Regio  V  at  the  site  and  pozzolanic  lime-based  mortar 

realized  according  to  the  traditional technique.  The first  phase  of  the  experimental  program 

involved the accurate reproduction of Pompeii-like masonry panels and the execution of sonic 

pulse  velocity  tests  to  be  compared  with  those  carried  out  on  original  structures  at  the  site. 

Thus,  three  in-situ  diagonal  compression  tests  were  carried  out  to  derive  masonry  shear 

strength  and  relevant  correlation  with  sonic  velocities.  The  last  phase  of  the  experimental 

program focuses on laboratory axial compression tests on five specimens extracted from the 

three panels analyzed in the first phase and is herein described in detail. The results of axial 

compression tests on two of such specimens in terms of axial compression strength and elastic 

modulus as well as the analysis of the crack pattern and failure mode is herein presented and 

discussed.

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== Full document ==

<pdf>Media:Draft_Content_873331704p735.pdf</pdf>

== References ==

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[1] B. De Nigris, M. Previti, L’affidabilità strutturale degli interventi di messa in sicurezza  del  patrimonio  archeologico,  in:  N.  Augenti,  L.  Jurina  (Eds.),  Ing.  Forense,  CRolli,  Affidabilità Strutt. Consolidamento, Dario Flaccovio Editore, Milan, 2017: pp. 493–502.  

​

[2] Recommendations PCM, Assessment and mitigation of seismic risk of cultural heritage  with reference to the Italian Building Code (NTC2008). Directive of the Prime Minister, 9/02/2011. G.U. no. 47, 26/02/2011 (suppl. ord. no. 54) (in Italian), (2011).  

​

[3] ICOMOS, Recommendations for the analysis, conservation and structural restoration of  architectural heritage, (2003) 1–37. https://ancientgeorgia.files.wordpress.com/2012/04/recommendations_icomos- principles-and-guidelines.pdf.  

​

[4] F. Autiero, G. De Martino, M. Di Ludovico, A. Prota, Mechanical Behavior of Ancient  Mortar Specimens From Pompeii Site, in: 2019: pp. 1251–1262.  https://doi.org/10.7712/120119.6994.18836.  

​

[5] F.  Autiero,  G.  De  Martino,  M.  Di  Ludovico,  A.  Prota,  Mechanical  properties  of  rock units  from  the  Pompeii  archaeological  site,  Italy,  in:  P.  De  Wilde  (Ed.),  Struct.  Stud.  Repairs Maint. Herit. Archit. XVI, 2019: pp. 341–350.  https://doi.org/10.2495/STR190291.  

​

[6] RILEM MS.D.2, Determination of masonry rebound hardness, Mater. Struct. 31 (1998)  363–377.  

​

[7] UNI  EN  12504-2,  Testing  concrete  in  structures  -  Determination  of  rebound  number, (2012).  

​

[8] ASTM  D5873,  Determination  of  Rock  Hardness  by  Rebound  Hammer  Method  1,  Current. (1981) 4–7.  

​

[9] UNI EN 14579, Natural stone test methods - Determination of sound speed propagation,  (2005).  

​

[10] ASTM D2845-08, Standard Test Method for Laboratory Determination of Pulse  Velocities and Ultrasonic Elastic Constants of Rock, (2017).  

​

[11] UNI  EN  1926,  UNI  EN  1926:2000.  Natural  stone  test  methods  -  Determination  of  compressive strength, (2003).  

​

[12] C.. Giuliani, L’edilizia nell’antichità, 2007.  

​

[13] J.P. Adam, L’arte di costruire presso i romani. Materiali e tecniche., Milan, 2014.  

​

[14] UNI EN 1015-11, UNI EN 1015-11:2007. Methods of test for mortar for masonry - Part  11: Determination of flexural and compressive strength of hardened mortar, (2007).  

​

[15] H.  Dessales,  Villa  de  Diomède.  Campagne  d’étude  2015,  Chronique  des  activités  archéologiques de l’École française de Rome, 2015. http://cefr.revues.org/1293.  

​

[16] M.R.  Valluzzi,  F.  Lorenzoni,  R.  Deiana,  S.  Taffarel,  C.  Modena,  Non-destructive  investigations for structural qualification of the Sarno Baths, Pompeii, J. Cult. Herit. 40  (2019) 280–287. https://doi.org/10.1016/j.culher.2019.04.015.  

​

[17] ASTM  E  519-02,  Standard  Test  Method  for  Diagonal  Tension  (Shear)  in  Masonry  Assemblages, Am. Soc. Test. Mater. (2002) 5. https://doi.org/10.1520/E0519.  

​

[18] EN 1052-1, Methods of test for masonry - Part 1: Determination of compressive strength,  Eur. Comm. Stand. (1999) 11.  

​

[19] ASTM C 597-02, Pulse Velocity Through Concrete, United States Am. Soc. Test. Mater.  04 (2003) 3–6. https://doi.org/10.1520/C0597-09.  

​

[20] L.  Miranda,  L.  Cantini,  J.  Guedes,  L.  Binda,  A.  Costa,  Applications  of  sonic  tests  to masonry  elements:  Influence  of  joints  on  the  propagation  velocity  of elastic  waves,  J. Mater. Civ. Eng. 25 (2013) 667–682. https://doi.org/10.1061/(ASCE)MT.1943- 5533.0000547.  

​

[21] L.F.  Miranda,  J.  Rio,  J.  Miranda  Guedes,  A.  Costa,  Sonic  Impact  Method  -  A  new technique for characterization of stone masonry walls, Constr. Build. Mater. 36 (2012) 27–35. https://doi.org/10.1016/j.conbuildmat.2012.04.018.

​