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Povzetek: The use of fly ash in construction applications reduces the amount of waste that needs to be landfilled. As some types of fly ash show high potential for CO2 sequestration (e.g. co-combustion fly ash), the use of carbonated fly ash could also help with the reduction of carbon emissions in the construction sector. This paper presents the results of LCA study that compared the environmental impacts associated with the construction of an embankment using carbonated cocombustion fly ash and conventional construction material (i.e. soil). The cocombustion fly ash was carbonated naturally, which eliminated the environmental impacts related to the accelerated carbonation, such as capturing and supply of CO2, and energy consumption for the carbonation process. Results show that the use of carbonated co-combustion fly ash for embankment construction has several environmental advantages compared to the construction with soil, such as lower impact associated with the transport of material, environmental benefit associated with the avoided landfilling and reduction in the carbon footprint due to the natural CO2 sequestration
Ključne besede: secondary material, geotechnics, ash, LCA, sustainability
Objavljeno v DiRROS: 18.06.2026; Ogledov: 307; Prenosov: 136
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Povzetek: LCA analysis of the project-developed Zn-battery prototype.
Ključne besede: zinc batteries, mobility, green transition, LCA, sustainability, cinkove baterije, mobilnost, zeleni prehod, LCA, trajnostnost
Objavljeno v DiRROS: 14.04.2026; Ogledov: 514; Prenosov: 0
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Povzetek: The purpose of the study is to evaluate the environmental performance of two systems for space heating and hot water provision in a residential building. In both cases, a ground-source heat pump is used. In the baseline system, the heat pump is driven by electrical power from the grid. In the alternative system, photovoltaic thermal collectors are integrated into the building for domestic hot water preparation and the production of electricity. Excess heat produced in the summer is introduced to the borehole and extracted later, in the cooler part of the year. Environmental benchmarking of the two systems was conducted using the Life Cycle Assessment method. A cradle-to-grave approach was applied, taking into account all life cycle stages of the system and its operation over 20 years. Results show that the alternative system yields significantly lower impacts in terms of Global Warming Potential (36% decrease) and Resources (36% decrease). In terms of Human Health, the decrease is minor (6%). However, in terms of Ecosystem, the alternative system shows a 47% higher impact than the baseline system. This increase is primarily attributed to the additional components required in the alternative configuration.
Ključne besede: LCA, GWP, heat pump, thermal energy storage, photovoltaic thermal collectors, heating, domestic hot water
Objavljeno v DiRROS: 17.11.2025; Ogledov: 896; Prenosov: 420
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Povzetek: Wood is considered a promising raw material for the circular bioeconomy and has the ability to store biogenic carbon, and this is one reason why we want to extend the service life of the wood. In order to consider the influence of durability in our study, we used two wood species with different lifespans. Beech (Fagus sylvatica L.) belongs to the group of very sensitive wood species, as the durability of the untreated wood is estimated to be around 5 years; meanwhile, pine (Pinus sylvestris L.) belongs to the group of moderately resistant wood species, where the durability of the untreated wood is estimated to be up to 15 years. While toxic chemicals are often used for wood preservation, hydroxyapatite offers an environmentally friendly solution for wood mineralization. This study presents life cycle assessment (LCA) and life cycle cost (LCC) analyses comparing a novel hydroxyapatite (HAp) mineralization method with a service life of 50 years to a non-mineralized reference alternative. LCA was based on EN ISO 14040 and EN ISO 14044, while LCC was adapted from the European Commission’s LCC tool for public procurement. The results of the LCA show that mineralized wood has a lower overall impact on the environment than surface-treated beech wood but a higher impact than surface-treated pine wood. Most impact categories were determined by electricity consumption with the exception of stratospheric ozone depletion, water consumption, and land use. Water consumption proved to be the category where the mineralization process was problematic due to water consumption during the leaching process. The LCC showed that mineralized wood is the most cost-effective solution for the exterior façade, as all costs, but especially investment costs, were lower. The differences in the LCA and LCC results are mainly due to the different lifetimes of the two alternatives. It can be concluded that if energy-intensive processes and chemicals are used in the production of the material, the extended lifetime must be sufficient to account for the additional impacts that occur during the production phase.
Ključne besede: environmental impacts, hydroxyapatite, life cycle assessment (LCA), life cycle cost analysis (LCC), wood mineralization
Objavljeno v DiRROS: 09.09.2024; Ogledov: 1639; Prenosov: 3437
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Povzetek: The study compared environmental footprints of two types of Al-alloys: well-known 5083 aluminium alloy with magnesium and traces of manganese and chromium in its composition. This material is highly resistant to seawater corrosion and the influence of industrial chemicals. Furthermore, it retains exceptional strength after welding. The comparisons were made to an innovative alloy where the aluminium based matrix is reinforced by metastable quasicrystals (QC), thus avoiding magnesium in its composition. Furthermore, we checked other aluminium ingots' footprints and compared European average and Germany country specific production data. Environmental footprints were assessed via cradle to gate life cycle assessment. Our findings normalized to 1 m2 plate suggest, that newly proposed alloy could save around 50 % in value of parameters abiotic resources depletion of fossil fuels, acidification, eutrophication, global warming potential and photochemical ozone creation potential if we compare Qc5 to 6 mm 5083 alloy plate. Only abiotic resources depletion of elements and ozone depletion parameters increase for Qc5 compared to 6 mm 5083 alloy plate.
Ključne besede: environmental footprints, LCA, Al-alloys
Objavljeno v DiRROS: 05.04.2024; Ogledov: 1718; Prenosov: 855
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