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Maria Sabbà
Department of Civil Engineering Sciences and Architecture, Polytechnic University of Bari, Via E. Orabona 4, 70125 Bari, Italy

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Journal article
Published: 04 May 2021 in Fibers
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Raw earth is one of the oldest building materials, which is suitable for various uses: from the construction of load-bearing walls to use for plasters and finishes. The presence of straw fibers can give different behavior to this material. The present paper illustrates preliminary sensory and qualitative analyses, and subsequent laboratory tests that allow the characterization of the raw earth material with straw fibers for rammed earth constructions through mechanized compaction and the identification of a compatible earth mortar. The raw material considered in this study is mainly clayey; for this reason, a mix design usable with the pisé (or clay) technique has been developed. Cylindrical samples have been made through a press and subject to unconfined compression and indirect tensile tests. The results of the tests showed consistent tensile and compressive strength values in the context of earth materials. At the same time, a study for the realization of a mortar with the same base soil was carried out considering four mixtures, in order to investigate the best compromise between workability, shrinkage and compressive strengths. The purpose of the study was to investigate the mechanical characteristics of the local material through preliminary and laboratory tests, to classify it according to the Unified Soil Classification System (USCS) and to verify its suitability for a possible use in the construction field.

ACS Style

Maria Sabbà; Mariateresa Tesoro; Cecilia Falcicchio; Dora Foti. Rammed Earth with Straw Fibers and Earth Mortar: Mix Design and Mechanical Characteristics Determination. Fibers 2021, 9, 30 .

AMA Style

Maria Sabbà, Mariateresa Tesoro, Cecilia Falcicchio, Dora Foti. Rammed Earth with Straw Fibers and Earth Mortar: Mix Design and Mechanical Characteristics Determination. Fibers. 2021; 9 (5):30.

Chicago/Turabian Style

Maria Sabbà; Mariateresa Tesoro; Cecilia Falcicchio; Dora Foti. 2021. "Rammed Earth with Straw Fibers and Earth Mortar: Mix Design and Mechanical Characteristics Determination." Fibers 9, no. 5: 30.

Original article
Published: 04 January 2021 in Bulletin of Earthquake Engineering
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In the last decades, several researchers have proposed procedures for the evaluation of the seismic risk of buildings with different structural typologies. The main aim of these studies is the possibility of giving a tool to engineers and Authorities for assessing the seismic vulnerability of the existing building patrimony and, thus, planning the interventions. In the practical applications, the widespread approach expresses the seismic risk as a function of an economic parameter and a safety index. This procedure, which is regulated by the actual Italian codes, has been calibrated for the application to residential buildings. However, this approach appears to be inadequate to analyze cultural buildings due to their peculiar aspects, which cannot be re-conducted to the residential building ones, and for which a specific and deep analysis is needed. The present paper deals with this topic by proposing a new procedure, specifically calibrated on historic and/or cultural structures, which makes use of additional economic parameters to consider the historic, artistic, architectural, cultural, and socio-economical character of these buildings. The main advantage of the proposed procedure is the simplicity of implementation that may guarantee its diffusion in practical applications, and the possibility of its extension to other kinds of structures which, due to their characteristics, cannot be treated as residential buildings. The procedure and its advantages are here discussed by evaluating the seismic risk class of the Norman tower of Craco (Matera, Italy).

ACS Style

Mariella Diaferio; Dora Foti; Maria F. Sabbà; Michela Lerna. A procedure for the seismic risk assessment of the cultural heritage. Bulletin of Earthquake Engineering 2021, 19, 1027 -1050.

AMA Style

Mariella Diaferio, Dora Foti, Maria F. Sabbà, Michela Lerna. A procedure for the seismic risk assessment of the cultural heritage. Bulletin of Earthquake Engineering. 2021; 19 (2):1027-1050.

Chicago/Turabian Style

Mariella Diaferio; Dora Foti; Maria F. Sabbà; Michela Lerna. 2021. "A procedure for the seismic risk assessment of the cultural heritage." Bulletin of Earthquake Engineering 19, no. 2: 1027-1050.

Journal article
Published: 08 September 2020 in Infrastructures
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In the present paper a new and innovative way to approach the regeneration of public buildings and public housing is proposed. It consists in a dissipative steel frame to reduce the displacement demand and to improve the energy efficiency of a real existing structure, inserting buckling-restrained axial dampers (BRAD) type dissipative braces. This system is adaptable to any construction made of reinforced concrete frames and improves energy efficiency and earthquake-resistant performance; moreover, it upgrades the aesthetics of buildings and the quality of life for the users. In fact, the system is capable of assuming different and pleasant architectural shapes offering benefits in terms of earthquake-resistant performance, energy saving, and energy production from renewable sources. The attention to the aesthetic results renders the intervention a redevelopment strategy not only on an architectural scale, but also in the urban contexts for degraded and marginalized suburbs. The performances of the proposed kit were evaluated on a case study consisting in a social house located in the south of Italy. Numerical analyses have been carried out and the results have been reported both from the seismic protection and energy efficiency points of view. As a result, the produced renewable energy from the retrofitting system and the building seismic capacity increased. A rapid and precise control process, able to return a suitable structural dimensioning of the frame, according to the different application contexts, is finally proposed.

ACS Style

Dora Foti; Francesco Ruggiero; Maria Francesca Sabbà; Michela Lerna. A Dissipating Frames for Seismic Retrofitting and Building Energy-Efficiency. Infrastructures 2020, 5, 74 .

AMA Style

Dora Foti, Francesco Ruggiero, Maria Francesca Sabbà, Michela Lerna. A Dissipating Frames for Seismic Retrofitting and Building Energy-Efficiency. Infrastructures. 2020; 5 (9):74.

Chicago/Turabian Style

Dora Foti; Francesco Ruggiero; Maria Francesca Sabbà; Michela Lerna. 2020. "A Dissipating Frames for Seismic Retrofitting and Building Energy-Efficiency." Infrastructures 5, no. 9: 74.

Journal article
Published: 27 March 2019 in Applied Sciences
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The paper shows the results of an experimental tests campaign carried out on concretes with recycled aggregates added in substitution of sand. Sand, in fact, has been totally replaced once by blast-furnace slag and fly ashes, once by blast-furnace slag and microsilica. The aim is both to utilize industrial by-products and to reduce the use of artificial aggregates, which impose the opening of pits with high environmental damage. The results show that in the concretes so made the water absorption capacity has reduced and durability has improved. The test campaign and the results described in the present article are certainly useful and can be especially utilized for research on a larger scale in this field.

ACS Style

Dora Foti; Michela Lerna; Maria Sabbà; Vitantonio Vacca. Mechanical Characteristics and Water Absorption Properties of Blast-Furnace Slag Concretes with Fly Ashes or Microsilica Additions. Applied Sciences 2019, 9, 1279 .

AMA Style

Dora Foti, Michela Lerna, Maria Sabbà, Vitantonio Vacca. Mechanical Characteristics and Water Absorption Properties of Blast-Furnace Slag Concretes with Fly Ashes or Microsilica Additions. Applied Sciences. 2019; 9 (7):1279.

Chicago/Turabian Style

Dora Foti; Michela Lerna; Maria Sabbà; Vitantonio Vacca. 2019. "Mechanical Characteristics and Water Absorption Properties of Blast-Furnace Slag Concretes with Fly Ashes or Microsilica Additions." Applied Sciences 9, no. 7: 1279.