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1.
Optimizing process parameters of clay-based ceramics with addition of construction and demolition waste
Biljana Angjusheva, Vilma Ducman, Monika Fidancevska, Vojo Jovanov, 2021, izvirni znanstveni članek

Povzetek: Construction and demolition waste produced in the Republic of North Macedonia remains a major economic and environmental problem because all construction and demolition waste ends up in local dumps or is disposed of in a landfill. The objective of this study was to investigate the influence of the process parameters on the physical and mechanical properties of clay-based ceramics with partial replacement of clay with construction and demolition waste. Determination of the chemical composition of the waste demolition brick using X-ray fluorescence showed that it consisted of different oxides such as SiO2, Al2O3, Fe2O3 and CaO and minor contents of alkaline and earth alkaline oxides. Production of these ceramics was conducted through the consolidation of clay and waste demolition brick with the evaluation of the main process parameters such as sintering temperature [ST], the content of waste demolition brick [WDB] and isothermal period at the final temperature [IP]. The final model equations for density and bending strength dependence of the main process parameters were obtained and presented. The microstructure of the ceramics determined by SEM shows that the waste material is homogeneously dispersed in the clay matrix.
Ključne besede: CDW, clay, ceramics, properties
Objavljeno v DiRROS: 19.08.2024; Ogledov: 542; Prenosov: 208
.pdf Celotno besedilo (884,49 KB)
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2.
Innovative pre-fabricated components including different waste construction materials reducing building energy and minimising environmental impacts (InnoWEE)
Elena Loredana Fodor, Vilma Ducman, Giovanni Ferrarini, Sergio Tamburini, Constantinos Tsoutis, Francesca Becherini, Antonio Garrido-Marijuán,, Giulia Mezzasalma, Leonardo Rossi, Emil Lezak, Adriana Bernardi, 2019, objavljeni znanstveni prispevek na konferenci

Povzetek: InnoWEE is a four-year project (from 2016 to 2020) financed by the European Community that involves ten partners from different European countries, as Greece, Italy, Belgium, Romania, Slovenia, Spain and Poland. The aim is to use the waste materials coming from construction and demolition processes of buildings and include them into a geopolymeric matrix with the purpose of producing prefabricated panels for different applications. Construction and demolition waste (CDW) materials with suitable characteristics have been selected to develop high performance geopolymeric panels for building walls envelopes and radiant panels for indoor walls and ceilings with low environmental impact. Field tests will be carried out in different sites in Europe characterized by different climatic conditions to check the simplicity of the installation procedure and the performance of the panels in terms of energy efficiency and environmental impact.
Ključne besede: prefabriced elements, geopolymers, CDW
Objavljeno v DiRROS: 08.03.2024; Ogledov: 584; Prenosov: 267
.pdf Celotno besedilo (1,99 MB)
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3.
The effect of the addition of construction & demolition waste on the properties of clay-based ceramics
Biljana Angjusheva, Vilma Ducman, Emilija Fidanchevski, 2022, izvirni znanstveni članek

Povzetek: Waste glass and reclaimed brick are types of construction and demolition waste (C&DW) that could potentially be used as secondary raw materials in the production of ceramics. Ceramics based on clay, waste demolished brick (5-15 wt.%) and waste glass (5-20 wt.%) were produced by pressing (P = 68 MPa) and subsequently sintered at 900, 950, 1000, and 1050 ° C for one hour. The physical and mechanical properties of the ceramics obtained were evaluated. The addition of demolished brick decreased the density and mechanical properties of the clay specimens and increased the water absorption. The incorporation of waste glass improved the sintering behavior and its mechanical properties. The addition of 20 wt.% waste glass and 10 wt.% waste demolished brick into the clay matrix improved the flexural strength by up to 20.6 % and decreased the water absorption by up to 22 %. The approach presented promotes an opportunity to recycle construction and demolition waste into alternative resource materials, and represents a positive contribution to the environment.
Ključne besede: CDW, ceramics, properties
Objavljeno v DiRROS: 25.04.2023; Ogledov: 749; Prenosov: 451
.pdf Celotno besedilo (1,85 MB)
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