Search results for " lime"
showing 10 items of 55 documents
Reuse and recycling in construction: novel photocatalytic nano-mortars from valorised industrial wastes
2021
Production of novel eco-composite nano-mortars for architectural finishing, designed to combat environmental pollution affecting building shells, is reported. Specimens consist of a natural hydraulic lime mortar matrix doped with various kinds of nanophotocatalysts, produced from valorized industrial wastes: TiO2-hexaferrite from Fe3O2, and Ti(SO4)2-hydroxyapatite from Atlantic codfish bones. Samples were characterized and their photocatalytic activity was evaluated. Analysis showed that industrial wastes may be usefully reused to produce a new generation of sustainable, cheap and multifunctional novel building materials.
Middle Triassic (Ladinian) deep-water sediments in Sicily: New findings from the Madonie Mountains
2012
A section of carbonate megabreccias grading upward to deep-water Daonella limestones is described from the locality of Sant’Otiero, near Petralia Sottana, in the Madonie Mountains (Sicily). The megabreccia mainly consists of neritic elements containing dasycladalean algae (Diplopora annulatissima Pia) along with benthic foraminifers and problematics. The overlying calcilutitic strata are characterized by lumachella intercalations containing the bivalve Daonella tyrolensis Mojsisovics suggesting an early Late Ladinian (Protrachyceras longobardicum ammonoid zone) age. We informally name the Daonella limestone as the calcare di Sant’Otiero (Sant’Otiero limestone). The Daonella limestones along…
Criteria for Laboratory Studies on Fine Soils Treated with Lime
2011
When selecting the appropriate materials for constructing road infrastructures, an important way for minimizing both the economical and environmental impact is to make use of lime for treating those natural soils that, involved in the earthwork for opening road fences, are not suitable, as they are in nature, to fulfill the specific requirements for being used as part of road construction, such as road embankments (including the capping layer) or the improved subgrade or, again, the sub-formation. From this point of view, the treatment of fine soils with lime (if needed, with lime and cement) can be considered as one of the main measures for preserving the natural environment since it fulfi…
Prova di campo per i lavori di trattamento delle terre argillose con calce per lavori stradali e ferroviari [Field test of lime treatment of clayey s…
2014
Si presentano i risultati di una prova di campo svolta su un rilevato sperimentale appositamente progettato e costruito per le finalità del trattamento con calce delle terre argillose. Tale prova di campo è stata sviluppata nell’ambito dei lavori di ammodernamento di una infrastruttura di grande comunicazione in Sicilia, per consentire il reimpiego delle argille di risulta dagli scavi previsti in progetti nella costruzione delle parti in rilevato della stessa. Il programma sperimentale messo a punto si è pertanto concentrato sull’identificazione e la caratterizzazione geotecnica delle argille di scavo al fine di definire le modalità esecutive del loro trattamento con calce. Attraverso le pr…
A SOLUTION FOR QUARRY LIMESTONE DUST RECYCLING
2019
Quarry dust is a product of the extracting process. In quarrying activities, the rock is extracted and transformed into various sizes: as a waste, a fine aggregate generally useless to be disposed of and able to produce environmental pollution is produced. The disposal of this type of waste is a further cost of the extracting process, further it is a risk especially for subsoil reserves of wa-ter that can be easily reached during rainfalls and for the sea when quarries are close to the coast. The productive use of quarry dust with the double aim of disposal and protection of the environment seems a right strategy. The Italian-Maltese extracting industry covers a great segment in the world w…
Characterization of serpottas' stuccos by means of simultaneous thermal analysis: Preliminary results
2015
In this paper the Simultaneous Thermal Analysis (STA), i.e. thermogravimetric and differential thermal analysis, was used as a diagnostic tool to better understand the matter composition of some very valuable artworks the Serpottas’ stuccoes in Palermo. Particularly the STA was used in order to exclude the presence of an unusual calcium-bearing magnesium carbonate, and the thermal data were also used to quantify the magnesite to calcite ratio. The latter was investigated in order to evaluate the amount of magnesium in the lime used as binder as during 17th and 18th century in Sicily magnesium rich lime was indicated as the most valuable binder probably because this kind of lime has a higher…
Il Mare di mezzo: storie di naviganti, di lotta per il diritto e di luci nel buio della frontiera
2022
This paper analyses the way in which, and the reasons why, the Mediterranean Sea, from being a limes between lands, has become the frontier we know today: the space of an emblematic struggle for law and rights, which contrasts the policies of governments with the forced movements of people in migration and with civil society organizations that try to promote and protect fundamental rights. In this context, the direct experience of some search and rescue missions in the Mediterranean Sea has been used to highlight the extent of this conflict with respect to the violation of the national and domestic legal frameworks carried out by the European states, Italy in the lead, also through the invo…
"La bella limena" (1872) y los inicios de la prensa femenina
2021
En este trabajo se analiza la revista "La bella limena", que se publica en Lima en la segunda mitad del siglo XIX, y es una de las primeras revistas que se dirige a la mujer.
The mosaic of the Frigidarium of “Villa Bonanno” in Palermo: mineralogical and petrographic analyses for in situ conservation and restoration interve…
2017
The topic of this study was the mineralogical and petrographic characterization of bedding mortars (made of different layers) and tesserae of Roman age (3rd Century A.D.), taken from the mosaic of the Frigidarium of “Villa Bonanno”, brought to light by archaeological excavations conducted in the historical centre of Palermo. The collected samples have been analysed by thin-section optical microscopy (PLM), and scanning electron microscopy coupled with energy dispersive spectrometry (SEM-EDS). The study was aimed to define the “recipe” (composition of temper and binder, temper size distribution, temper/binder ratio), in order to assess the provenance of raw materials (supply site/area) and t…
Settlement, radiocarbon dates and craft productions during Late Neolithic and Bell Beaker periods in the ‘corredor de Montesa’ (Valencia, Spain). The…
2014
[EN] In this paper we present the results related to the excavation works conducted in Late Neolithic and Bell Beaker sites of Quintaret (Montesa, Valencia) and Corcot (l’Alcúdia de Crespins, Valencia), both in the middle valley of Canyoles river. The sites, neighboring each other, offer a quite different volume of information (Quintaret: 51 structures; Corcot: 4 structures). 14C dates allow us to define the occupation of this area of the valley along the first half of the III millennium cal BC. The presence of bell beaker ceramic in archaeological record of Quintaret is limited to just one structure (Q138), where at least 7 different vessels have been identified. Other prominent point of t…