Recent additions

  • Running out of excuses? Norwegian political and policy discourses justifying oil and gas development in the Arctic 

    Ballo, Bjørn Moen; Kristoffersen, Berit; Sidortsov, Roman (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-08)
    In this article, we analyse how energy security are woven into political discourses among Norwegian policymakers after the Russian invasion of Ukraine and the consequences of this for intergenerational justice and environmental concerns more broadly. Preceding justifications centred on state revenue and domestic economic growth, the current discourse focuses on the European need for security of ...
  • Same same, but different – or how construction informatics gets taught at universities in Norway and Sweden 

    Merschbrock, Christoph; Onstein, Erling; Danielsen, Peter E.; Johansson, Peter (Chapter; Bokkapittel, 2023)
    In response to the increasing demand for construction informatics (CI) expertise, universities in the Nordic countries have developed new educational offers. This study explores how CI related education is being delivered by three different universities, two in Norway and one in Sweden. By comparing curricula and interviewing CI teachers, this paper contributes to the recent debate on the international ...
  • Evaluating of melting-ice process in a vertical pipe with consideration of net sensible heat 

    Nguyen, Hung Thanh; Gjerløw, Eirik; Huynh, Minh-Thu T. (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-04-19)
    In ice-melting process, motion of liquid–solid interface is complicated due to moving boundary, which is also called Stefan interface problem. Although the Stefan model has been widely utilized, it frequently overestimates the melting rate. In the present study, the net-sensible-heat of the phases are taken into account as an additional physical effect to the Stefan model for one-phase case and ...
  • Enhanced performance of microbial fuel cells using electrochemically treated carbon felt anode 

    Poureshghi, Fatemeh; Calay, Rajnish K; Das, Subhashis (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-10)
    The microbial fuel cell (MFC) technology is emerging as an effective technology for wastewater treatment to remove and detect many pollutants and simultaneously generate power. The anode is an essential component for bacterial attachment and extracellular electron transfer (EET). Thus, anode performance is critical for improving an MFC system's overall performance. Materials that are electronically ...
  • Assessing shielding material Performance: Benchmarking of Monte Carlo codes for oil shale and Basalt-Boron fiber concretes Hando Tohver a,* , Andrius Slavickas b , Maryna Holiuk c , Andrejs Krasn¸ i 

    Tohver, Hando; Motlep, Riho; Krasnikovs, Andrejs; Novakova, Iveta; Gulik, Volodymyr; Slavickas, Andrius; Holiuk, Maryna; Vaišnoras, Mindaugas (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-12-12)
    Cement-based concretes are commonly used for managing radioactive waste due to their low cost and radiation shielding properties. However, the potential of using oil shale ash as an additive in waste packaging material has been overlooked. This study focuses on benchmarking and developing a Monte Carlo based modeling methodology using multiple transport codes (MCNP, SERPENT, SCALE, OpenMC, and ...
  • Effect of pH, COD, and HRT on the Performance of Microbial Fuel Cell Using Synthetic Dairy Wastewater 

    Banerjee, Aritro; Calay, Rajnish K; Das, Subhashis (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-30)
    Microbial fuel cells (MFC) are emerging technologies that can produce electricity while treating wastewater. A series of tests were carried out to evaluate the efficiency of this technology for treating dairy wastewater (DWW). The experiments used Shewanella baltica as an exoelectrogen in a small single MFC to treat simulated DWW. The impacts of various operational factors, specifically pH, ...
  • Iron ore dust as a natural pigment in concrete with RCA for artwork application 

    Novakova, Iveta; Buyle, Boy-Arne; Ørmen, Lene Baadsvig (Chapter; Bokkapittel, 2022)
    A The innovative idea of utilization of iron ore dust (IODust), characterized by red hue typical for Narvik, came up during designing artwork for The Arctic University of Norway campus Narvik. The use of waste from iron ore production as a natural pigment was completed by partial replacement of natural aggregates (NA) by recycled concrete aggregates (RCA) to achieve a higher level of material ...
  • DEVELOPMENT OF METHOD AND CRITERIA FOR EVALUATION OF DRY-WASHING EFFICIENCY WITH RE-CON ZERO EVO 

    Novakova, Iveta; Norman, Sven-Henrik; Bista, Dipen (Chapter; Bokkapittel, 2022)
    Society recognises the need for the preservation of nature and the need for better resource utilisation. Integration of good practice in the building industry is mainly targeted at reducing or completely eliminating waste. One of the waste sources in the concrete industry is created in washing facilities and consists of returned concrete, washing water and cement slurry. Concrete trucks are washed ...
  • Evaluation of optimal replacement of natural aggregates by recycled concrete aggregates to achieve sufficient durability 

    Novakova, Iveta; Sjåfjell, Jørgen J.; Venkrbec, Vaclav (Preprint; Manuskript, 2022)
    The use of recycled concrete aggregate (RCA) is one way to reduce the depletion of raw materials for the production of concrete. In this article RCA was tested and evaluated. Concrete with 25 to 80 % of RCA was examined in terms of its durability performance, particularly capillary absorption and shrinkage. Capillary absorption testing showed that RCA has better or identical results as the reference ...
  • Investigating Effects of pH on Microbial Growth in Continuous Stirred Tank Bioreactors 

    Das, Subhashis; Calay, Rajnish K; Chowdhury, Ranjana (Conference object; Konferansebidrag, 2017)
  • A Review on Emerging Cementitious Materials, Reactivity Evaluation and Treatment Methods 

    Jhatial, Ashfaque Ahmed; Novakova, Iveta; Gjerløw, Eirik (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-05)
    Alternative to traditional concrete, sustainable concrete reduces cement content, waste management issues, and CO2 emissions. To achieve sustainable concrete, waste materials can be used as supplementary cementitious materials (SCMs) to partially replace cement. Fly ash, ground-granulated blast furnace slag, and silica fume have been heavily studied as SCMs. However, due to the retirement of coal-fired ...
  • Isolation and Characterisation of Electrogenic Bacteria from Mud Samples 

    Schneider, György; Pásztor, Dorina; Szabó, Péter; Kőrösi, László; Kishan, Nandyala Siva; Raju, Penmetsa Appala Rama Krishna; Calay, Rajnish K (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-17)
    To develop efficient microbial fuel cell systems for green energy production using different waste products, establishing characterised bacterial consortia is necessary. In this study, bacteria with electrogenic potentials were isolated from mud samples and examined to determine biofilm-formation capacities and macromolecule degradation. Matrix-assisted laser desorption/ionization time-of-flight ...
  • Design basis for Arctic infrastructure facilities 

    Myrmel, Liv Brita Hætta; Gudmestad, Ove Tobias (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-01-18)
    A discussion related to the selection of a proper design basis for Arctic infrastructure facilities is presented. The design basis, which must be sufficiently robust to ensure safe operations of the facilities during their planned lifetime, should include relevant information available from the local and indigenous people of the area. The need to properly document all data and assumptions made ...
  • Bridging Law Application to Fracture of Fiber Concrete Containing Oil Shale Ash 

    Upnere, Sabine; Novakova, Iveta; Jekabsons, Normunds; Krasnikovs, Andrejs; Macanovskis, Arturs (Journal article; Tidsskriftartikkel, 2023-07-23)
    Concrete is a widely used material in various industries, including hazardous waste management. At the same time, its production creates a significant carbon footprint. Therefore, intensive research is being conducted to create more eco-friendly concrete, for example, partially replacing cement with by-products such as oil shale ash (OSA) or improving properties by adding dispersed fibers such as ...
  • Effect of Microwave Radiation on the Compressive Strength of Solid Ceramic Brick 

    David, Průša; Karel, Šuhajda; Tomáš, Žajdlík; Kateřina, Svobodová; Stanislav, Šťastník; Klara, Hobzova; Venkrbec, Vaclav (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-04-13)
    Microwave radiation is widely utilized in construction practice, especially for drying building materials, remediating damp masonry, or sterilization of biotic pests that have infested building structures. The available scientific and technical literature reports that certain materials exposed to microwave radiation do not change their physical and mechanical properties, although this has not yet ...
  • Low Carbon Concrete Possibilities: EPD and Regulations in Northern Periphery and Arctic 

    Novakova, Iveta; Perumal, Priyadharshini; Cwirzen, Andrzej; Wallevik, Olafur Haralds (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-14)
    Concrete is one of the most common building materials in the Northern Periphery and Arctic, and therefore we should pay attention to its quality while reducing its carbon footprint. The concrete industry has established many measures to limit greenhouse gas emissions from concrete, as stated in the environmental product declaration (EPD). The most significant contributor is cement (common dose ...
  • Artificial Thawing of Frozen Ground: A Review 

    Ngo, Phan Thu Huong; Sveen, Svein-Erik; Gjerløw, Eirik (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-27)
    Understanding the freezing and thawing processes in porous media such as soils is important, especially in regions experiencing seasonal frost or permafrost. These processes have a wide range of implications as diverse as how to maintain the structural integrity of roads, railways, pipelines, and buildings, to when to plant seeds during the growth season. Thawing of frozen ground is the opposite ...
  • Preliminary Study on the Mechanical Activation and High‐Temperature Treatment of Saponite‐Containing Tailings Generated during Kimberlite Ore Dressing 

    Drozdyuk, Tatiana; Frolova, Maria; Ayzenshtadt, Arkady; Calay, Rajnish K; Jhatial, Ashfaque Ahmed (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-13)
    This study investigates transformations of a pre-mechanically activated saponite-containing material with subsequent high-temperature treatment. The thermogravimetric analysis confirmed that the mechanical activation of saponite leads to the destruction of its layered structure, accompanied by the release of silicon dioxide and magnesium oxide in free form. The values of surface activity for ...
  • Comparison of “Zero Emission” Vehicles with Petrol and Hybrid Cars in Terms of Total CO2 Release—A Case Study for Romania, Poland, Norway and Germany 

    Lieutenant, Klaus; Borissova, Ana Vassileva; Mustafa, Mohamad; McCarthy, Nick; Iordache, Ioan (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-27)
    The authors compare the energy consumption and CO<sub>2</sub> emissions from vehicles using internal combustion engines (ICE), battery electric vehicles (BEV), fuel cell electric vehicles (FCEV), and two types of hybrid vehicles, BEV‐ICE hybrid and BEV‐FCEV hybrid. This paper considers several scenarios for four countries’ electricity production from primary energy sources to estimate total ...
  • Review on material and design of anode for microbial fuel cell 

    Banerjee, Aritro; Calay, Rajnish K; Mustafa, Mohamad (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-21)
    Microbial Fuel Cell (MFC) is a bio-electrochemical system that generates electricity by anaerobic oxidation of substrates. An anode is the most critical component because the primary conversion of wastewater into electrons and protons takes place on the surface of the anode, where a biofilm is formed. This paper describes the essential properties of the anode and classifies its types according ...

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