Search results for "Plaster"
showing 10 items of 49 documents
Plaster ventilated façade system for renovating modern and ancient buildings. A CFD analysis
2021
In the past decades several researches have been related to energy saving and emissions reduction. The technologies that exploit passive natural ventilation, like ventilated roofs and fa ades, have been recognized as the effective methods to provide energy saving and comfort. Ventilated fa ades represent dry assembled coating systems for buildings, traditionally made of panels in different materials. Very few ventilated fa ade systems with plaster finishes are already present on the building market. The potentiality of their design solution can be considered, e.g., when an historic building has to be recovered, since they can enhance the energy efficiency of building without changing its ap…
Fregi classici in miniatura: il Partenone e il tempio di Bassae di John Henning
2021
La Gipsoteca del Dipartimento Culture e Società dell’Università di Palermo, di recente riallestita, possiede tra i suoi calchi due gessi di grande interesse. Si tratta delle repliche delle versioni miniaturizzate dei fregi del Partenone e del Tempio di Bassae che lo scultore scozzese John Henning realizzò a Londra, nei primi decenni dell’Ottocento. Le riproduzioni furono inizialmente incise su piccole tavole di ardesia, dalle quali potevano essere ricavati calchi in gesso, destinati alla vendita. Ne nacque presto un lucroso commercio di copie non autorizzate, dal quale purtroppo Henning non guadagnò nulla. Tali manufatti, che poche volte hanno attirato l’attenzione degli archeologi, assolve…
Effects of compositional and textural characteristics of clay based plasters on the control of indoor relative humidity
2015
Air humidity in contained spaces has a significant impact on health of inhabitants. The control capability of indoor relative humidity (RH) of clay-based plasters was tested on a series of commercially available products specifically designed for wall undercoating and on a natural earth collected in the surrounding area of Palermo. The innovative practice of ‘‘green building’’, since several years, led the interest of research to recyclable and reusable traditional materials that, in several cases, are a sustainable alternative to concrete and lime mortars. Earthen plasters, in general, have the ability to balance indoor humidity like no other classic building materials. The studied samples…
La Gipsoteca del Dipartimento Culture e Società dell'Università degli Studi di Palermo. Storia e catalogo
2017
Il volume presenta, per la prima volta, la storia e il catalogo della Gipsoteca del Dipartimento Culture e Società dell’Università degli Studi di Palermo. Si tratta di un’importante raccolta di calchi in gesso di sculture antiche, voluta da Antonino Salinas (1841-1914) ai tempi del suo magistero accademico e ora completamente riordinata, grazie a un nuovo allestimento curato dallo stesso autore di questo libro. The volume presents, for the first time, the history and catalog of the Gipsoteca of the Culture and Society Department of the University of Palermo. This is an important collection of plaster casts of ancient sculptures, commissioned by Antonino Salinas (1841-1914) at the time of hi…
COMPARISON OF CRIMSON FOUNTAINGRASS AND DISS FIBRES AS AGGREGATES FOR CEMENT MORTARS
2019
The use of natural fibres in cement composites is an expanding research field as their use can improve the mechanical and thermal behavior of cement mortars and reduce their carbon footprint. In this paper two different wild grasses, i.e. Pennisetum Setaceum, also known as crimson fountaingrass, and Ampelodesmos Mauritanicus, also called diss, are used as source of natural fibres for cement mortars. The principal aim is to evaluate the possibility of using the more invasive crimson fountaingrass in place of diss inside cement based vegetable concrete. The two plants’ fibres have been characterized by means of electron microscopy, helium picnometry; moreover, the thermal conductivity of fibr…
Piano col colore… !
2012
Il capitolo del volume Città, Intonaci, Colore, tratta il tema dei Piani del Colore in Italia. La trattazione presenta le riflessioni che si sviluppano in Italia sin dagli anni Settanta del XX secolo e che condurranno all'elaborazione dei cosidetti "piani del colore". Il saggio esamina i contenuti dei piani di molte città italiane e mostra gli esiti degli interventi sulle facciate delle architetture nei centri storici. The chapter of the book deals with the subject of the Color Plans diffused in Italy. The discussion presents the reflections that develop in Italy since the seventies of the twentieth century and that will lead to the processing of so-called "Color plans". The essay examines …
RFID epidermal sensor including hydrogel membranes for wound monitoring and healing
2015
This contribution experimentally demonstrates for the first time the feasibility of joint application of passive UHF RFID technology and hydrogel membranes to fabricate smart plasters able to gather and remotely transmit information on the conditions of human skin. In particular, this intelligent plaster is sensitive to temperature and fluid uptake/release and could open interesting scenarios in wound healing monitoring and drug delivery.
Effects of natural fibres reinforcement in lime plasters (kenaf and sisal vs. Polypropylene)
2014
Nowadays the tendency to realize environment-friendly products is becoming more widespread to ensure sustainable and smart development. The synthetic fibres, frequently used, are harmful to the environment because they are non-degradable and non-renewable. Their use has resulted in an increase of oil consumption. Therefore, the possibility of replacing them with natural fibres becomes increasingly concrete confirmed by the researches and investigations carried out. In this work three lime based plasters were prepared and analysed to evaluate the influence on their performance of different fibres used as reinforcement. In particular each plaster was realised by adding to the mortar the same …
A comparison between dental measurements taken from CBCT models and those taken from a digital method.
2011
The aims of the study were to assess speed, reliability, accuracy, and reproducibility in measuring mesiodistal tooth sizes, bicanine widths, bimolar widths, and arch lengths (ALs) using cone beam computed tomography (CBCT) and to compare them with the same measurements obtained using a two-dimensional (2D) Digital Method. Plaster study models were made for 27 patients and then digitalized and measured using a 2D Digital Method. CBCTs were undertaken on the same 27 patients using the Dental Picasso Master 3D® and the images obtained were then analysed using the InVivoDental program. The correlation study of the two measuring methods, which were compared by determining the regression paramet…
New exergy criterion in the multicriteria context: a life cycle assessment of two plaster products
2003
This paper deals with the exergy analysis (EXA) of plaster materials and ranks the environmental burdens due to the production of such materials. The calculation of the exergy loss during the whole examined process represents a relevant index, looking at the technology improvement of a process, as a suitable tool in aid of the trade-off of alternative materials in the decision making. A life cycle inventory is performed for building plaster products and the matrix method is used. The authors extend the application of EXA to life cycle assessment, conducting an exergetic life cycle assessment, and propose an exergetic index in the framework of multi-criteria decision making. An exergy balanc…