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    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 ...
  • A Review on Emerging Cementitious Materials, Reactivity Evaluation and Treatment Methods 

    Novakova, Iveta (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-15)
    Alternative to traditional concrete, sustainable concrete reduces cement content, waste management issues, and CO<sub>2</sub> emissions. To achieve sustainable concrete, waste materials can be used as supplementary cementitious materials (SCMs) to partially replace cement. Fly ash, groundgranulated blast furnace slag, and silica fume have been heavily studied as SCMs. However, due to the retirement ...
  • 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 ...
  • Standardisering av informasjonsflyten i tegningsløse modellbaserte prosjekter innenfor byggetekniske fag 

    Skogstad, Eirik (Master thesis; Mastergradsoppgave, 2022-05-18)
    Byggebransjen utvikles kontinuerlig, både med tanke på utførelse og verktøyene som benyttes på byggeplass men også hvordan selve prosjekteringsprosessen gjennomføres. Bruken av BIM i større prosjekter blir mer og mer vanlig, men potensialet som ligger i BIM som verktøy utnyttes i mange tilfeller svært lite effektivt. Det blir i mange prosjekter produsert både modell og tegninger for å sikre ...
  • 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 ...
  • Byggteknisk droneinspeksjon 

    Høiseth, Hege Therese (Master thesis; Mastergradsoppgave, 2022-05-16)
    Hjelpemidler og utstyr i byggebransjen er i stadig endring. Muligheten for å kunne gjennomføre byggtekniske inspeksjoner på en bedre måte er på god vei, nemlig ved bruk av droner. Droneinspeksjoner har blitt mer vanlig i de siste årene, da særlig på grunn av kostnadsbesparelse og innovasjon. Tema for denne oppgaven er byggteknisk droneinspeksjon, og hvilke fordeler og ulemper er det ved bruk av ...
  • Transportsystemer, Vann og avløps -teknikk 

    Starbo, Jostein (Master thesis; Mastergradsoppgave, 2023-01-17)
    Faget «Transportsystemer for Vann og avløpsteknikk» ved Institutt for Bygg, Energi og Material teknologi skal foreleses for første gang ved UiT Norges Arktiske Universitet våren 2023. For å utforme pensum i emnet vil denne oppgaven samle, analysere og søke å forbedre modeller fra følgende kilder og metoder: • Data fra utgitte lærebøker, rapporter eller tilgjengelig materiale. • Data fra aktuelle ...
  • 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 ...
  • Experimental Study of Power Generation and COD Removal Efficiency by Air Cathode Microbial Fuel Cell Using Shewanella baltica 20 

    Das, Subhashis; Calay, Rajnish K (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-05)
    Microbial fuel cells (MFCs) are a kind of bioreactor for generating electricity, facilitated by exoelectrogens while treating wastewater. The present article focuses on the performance of an air cathode plexiglass MFC in terms of chemical oxygen demand (COD) removal efficiency and power output by performing two sets of experiments. The proton exchange membrane and electrode materials were Nafion ...
  • Pre-Holocene volcanic ash in sediments near Jan Mayen 

    Gjerløw, Eirik; Haflidason, Haflidi; Höskuldsson, Ármann (Conference object; Konferansebidrag, 2022-05)
  • Teknisk analyse av et ny bygget sykehjem i 2021 etter passivhus standard. Dokumentasjon av funn etter stikkprøvekontroll av FDV 

    Xu, Xin (Master thesis; Mastergradsoppgave, 2022-05-24)
    SAMMENDRAG Da det skulle bygges nytt sykehjem på Åse i Andøy kommune ble det besluttet at det skulle bygges etter passivhus standarden som stiller strenge krav til utførelse og dokumentasjon. Hensikten med denne oppgaven er å gjennomføre en teknisk analyse bygget og innebærer å undersøke om bygget er oppført etter oppgitt kravspesifikasjon i anbudet og kontrollere FDV-dokumentasjon etter forskrifter ...

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