Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/5628
DC Field | Value | Language |
---|---|---|
dc.contributor.authorall | Jackson, M.; Northern Arizona University, History | en |
dc.contributor.authorall | Logan, J. M. | en |
dc.contributor.authorall | Scheetz, B. E. | en |
dc.contributor.authorall | Deocampo, D. | en |
dc.contributor.authorall | Cawood, C. G. | en |
dc.contributor.authorall | Marra, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.authorall | Vitti, M. | en |
dc.contributor.authorall | Ungaro, l. | en |
dc.date.accessioned | 2010-01-15T09:11:36Z | en |
dc.date.available | 2010-01-15T09:11:36Z | en |
dc.date.issued | 2009 | en |
dc.identifier.uri | http://hdl.handle.net/2122/5628 | en |
dc.description.abstract | The Grande Aula, or Great Hall, of the Markets of Trajan is an intact example of the sophisticated, domed, concrete architecture of imperial Rome, which records the expertise of Roman builders in formulating extraordinarily durable pozzolanic concretes between about AD 96 and 115. Petrographic, chemical, X-ray diffraction analyses and SEM images demonstrate that the pozzolanic mortars of the conglomeratic wall concretes contain strätlingite, a complex calcium aluminate cement hydrate (C2 ASH8) that gives modern cements high durability and compressive strength. It has not been previously recognized in ancient pozzolanic mortars. New methods of assessing bulk specific gravity of the porous concretes suggest unit weights of 1495 kg/m³ for the conglomeratic wall cores and 1200-1300 kg/m³ for the pumice-bearing vaulted ceiling mortar.Innovative point load tensile strength testing methods provide a means of evaluating the strengths of small samples of ancient, conglomeratic cementitious materials. Tests of coarse aggregate clasts, pozzolanic mortar, and the adhesive interfacial surfaces of coarse aggregate clasts (caementa) in contact with the mortar, suggest tensile strengths (ft) of 2.7 MPa for brick clasts, 1.2 MPa for Tufo Lionato tuff clasts, and 0.9 MPa for Tufo Giallo della Via Tiberina tuff clasts based on a tentative, approximate correlation with splitting (Brazilian) tests on these materials. The pozzolanic mortar and interfacial zones appear to have lower ft, in the range of 0.8 MPa to 0.5 MPa. The relatively low tensile strengths of the mortar and its somewhat tenuous adhesion to coarse aggregate clasts suggests that the caementa may have had a role in arresting the propagation of tensile microcracks that formed in the mortar, thereby increasing the composite tensile strength of the concrete. Roman builders evidently selected the complex aggregate mixes to optimize the performance and durability of the wall and vault masonry. | en |
dc.language.iso | English | en |
dc.relation.ispartof | Journal of Archaeological Science | en |
dc.relation.ispartofseries | 11/36 (2009) | en |
dc.subject | ancient Rome, concrete, pozzolanic mortar, strätlingite, tensile strength, expertise of Roman builders | en |
dc.title | Assessment of material characteristics of ancient concretes, Grande Aula, Markets of Trajan, Rome | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 2481-2492 | en |
dc.subject.INGV | 04. Solid Earth::04.01. Earth Interior::04.01.04. Mineral physics and properties of rocks | en |
dc.identifier.doi | 10.1016/j.jas.2009.07.011 | en |
dc.description.obiettivoSpecifico | 3.10. Storia ed archeologia applicate alle Scienze della Terra | en |
dc.description.journalType | JCR Journal | en |
dc.description.fulltext | open | en |
dc.contributor.author | Jackson, M. | en |
dc.contributor.author | Logan, J. M. | en |
dc.contributor.author | Scheetz, B. E. | en |
dc.contributor.author | Deocampo, D. | en |
dc.contributor.author | Cawood, C. G. | en |
dc.contributor.author | Marra, F. | en |
dc.contributor.author | Vitti, M. | en |
dc.contributor.author | Ungaro, l. | en |
dc.contributor.department | Northern Arizona University, History | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Norther Arizona University | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.dept | Northern Arizona University, History | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.orcid | 0000-0002-4881-9563 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
5.JAS_Grande Aula copia.fdf | main article | 1.18 MB | .fdf | View/Open |
WEB OF SCIENCETM
Citations
50
35
checked on Feb 10, 2021
Page view(s) 50
227
checked on Apr 17, 2024
Download(s) 5
909
checked on Apr 17, 2024