Search results for "ARCHITETTURA TECNICA"
showing 10 items of 478 documents
Valorisation of industrial iron oxide waste to produce magnetic barium hexaferrite
2016
Barium M-type hexagonal ferrite (BaM, BaFe12O19) is an immensely important magnetic material, which we have successfully made from the simple valorisation of Fe-rich industrial waste from steel wire drawing, with addition of BaCO3 and heating in air to 1000 degrees C. The optimum ratio of Fe. Ba (producing 86 wt% BaM) was found to be 11: 1 (non-stoichiometric), and secondary phases of alpha-Fe2O3 (non-magnetic) and ZnFe2O4 (poorly antiferromagnetic) were always present. This material consisted of small submicron platelets. A hard magnetic ferrite was produced with Ms=48.6 A m(2) kg(-1) and H-c=211.5 kA m(-1). The highest density was achieved by sintering samples with Fe: Ba ratios of 11: 1 …
La tradizione costruttiva degli edifici di culto in legno lituani tra XVIII e XIX secolo
2014
Lithuania is situated in a highly forested Northern Europe area and has a variety of wooden buildings. These buildings are still mostly prevalent in villages and towns as well as in large cities, intimately related with landscape and nature, most of which had been realized in 18th and 19th centuries. Among the wooden structures we enumerate the religious buildings, churches and bell towers, rich of historic values, presenting different forms and sizes, a complex design and stratified construction phases. The wooden buildings realized in the 18th century are rich of historical and stylistic references with the other European countries: in these churches we can find the perfect representative…
A HOLISTIC MULTI-METHODOLOGY FOR SUSTAINABLE RENOVATION
2019
A review of the barriers for building renovation has revealed a lack of methodologies, which can promote sustainability objectives and assist various stakeholders during the design stage of building renovation/retrofitting projects. The purpose of this paper is to develop a Holistic Multi-methodology for Sustainable Renovation, which aims to deal with complexity of renovation projects. It provides a framework through which to involve the different stakeholders in the design process to improve group learning and group decision-making, and hence make the building renovation design process more robust and efficient. Therefore, the paper discusses the essence of multifaceted barriers in buildin…
Role of Sky-gardens in Improving Energy Performance of Tall Buildings
2018
Natural ventilation has been used as a passive strategy for many decades but only now its importance in tall buildings for addressing the issues of high energy usage and reducing carbon footprints is emerging. Sky-gardens can play an important role in successful implementation of natural ventilation through amplification of natural wind speeds. This study presents a state-of-the-art review on optimization of tall buildings energy performance through incorporation of sky-gardens. Pros and cons of use of natural ventilation for multi-story buildings are highlighted. Details of involved technical difficulties and barriers in the construction and operation process of sky-gardens are also given.…
PROTEZIONE E MIGLIORAMENTO DELLE PRESTAZIONI ANTINCENDIO NEI TEATRI ALL’ITALIANA. FIRE PROTECTION AND PERFORMANCE UPGRADE IN ITALIAN STYLE THEATRES
2018
Se storicamente gli incendi sono stati la causa principale di distruzione di molti teatri all’italiana, ancora in un recente passato interventi di conservazione, restauro e adeguamento alle norme antincendio, in alcuni casi incolti e irrispettosi, ne hanno stravolto gli elementi architettonico-costruttivi caratterizzanti. Come per ogni edificio storico, ancor più nei Teatri, in cui l’effimero connota molte parti della costruzione, è necessario garantire oltre alla salvaguardia delle vite umane, la protezione dell’edificio e del suo valore intrinseco. Il processo per raggiungere livelli adeguati di prestazioni e sicurezza antincendio pone pertanto molte sfide per i legislatori, i progettisti…
Alkali-activated mortars for sustainable construction material: effects of binder-to-aggregate ratio and curing conditions
2019
Valorisation and reuse of industrial wastes has become a worldwide compelling topic to improve the sustainability of processes and materials. This paper discusses an alternative way to recycle the biomass fly ash, generated by the kraft pulp industry, to manufacture novel geopolymeric mortars intended for applications in construction. Biomass fly ash was used as a raw material, in partial substitution of the commonly used metakaolin, natural siliceous sand as aggregate. The followed manufacture process is highly simple and reproducible. Various proportions binder to aggregate were tested to study the effect on the final mortars properties. The mortars mechanical resistance was also studied …
ALKALI-ACTIVATED MORTARS FOR SUSTAINABLE CONSTRUCTION MATERIAL: EFFECTS OF BINDER-TO- AGGREGATE RATIO AND CURING CONDITION
2019
Valorisation and reuse of industrial wastes has become a worldwide compelling topic to improve the sustainability of processes and materials. This paper discusses an alternative way to recycle the biomass fly ash, generated by the kraft pulp industry, to manufacture novel geopolymeric mortars intended for applications in construction. Biomass fly ash was used as a raw material, in partial substitution of the commonly used metakaolin, natural siliceous sand as aggregate. The followed manufacture process is highly simple and reproducible. Various proportions binder to aggregate were tested to study the effect on the final mortars properties. The mortars mechanical resistance was also studied …
Controlling Thermal Flows through Natural Materials in Building Construction Sector
2019
Nowadays, the attention about the building sustainability is increasingly emerging, because of the major responsibility of the building field on the environmental degradation: both in terms of energy consumption from non-renewable sources and the raw materials impoverishment. In addition, the level of comfort required by users is growing and the thermal insulation of buildings becomes the key element for the reduction of energy consumption and CO2 emissions, both in the case of new construction and of the existing ones. The heat load of a building depends on the presence of insulating material which defines the performance of the building envelope. The main purpose of this work is both to i…
Costruire l'Architettura. Tecniche e Tecnologie per il progetto
2010
Il patrimonio "cavo". Architetture ipogee e spazio idraulico nella piana di Palermo
2018
The valorisation policies and protection of “visible” architectural heritage are often promoted by the public opinion, that immediately perceives in the artefacts or landscape degradation the risk of an irreparable loss. Conversely, the safeguard of the underground built heritage is ever more difficult to achieve. It is the case of the "hollow architecture" functional to ensuring water provisioning in the Plain one of Palermo, the so-called “horizontal wells”. The most interesting aspect is the complex dense network of canals for the abstraction of groundwater resources. These artefacts date back to the sixteenth century – though an older dating is not to be excluded – and they outline the …