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Träfflista för sökning "hsv:(TEKNIK OCH TEKNOLOGIER) hsv:(Samhällsbyggnadsteknik) hsv:(Miljöanalys och bygginformationsteknik) ;pers:(Al Ayish Nadia)"

Sökning: hsv:(TEKNIK OCH TEKNOLOGIER) hsv:(Samhällsbyggnadsteknik) hsv:(Miljöanalys och bygginformationsteknik) > Al Ayish Nadia

  • Resultat 1-5 av 5
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1.
  • Kurkinen, Eva-Lotta, et al. (författare)
  • Energy and climate-efficient construction systems : Environmental assessment of various frame options for buildings in Brf. Viva
  • 2018
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • In the collaborative forum Positive footprint housing® Riksbyggen is building the Viva residential quarter, which is a sustainability project at the very forefront of what is possible with contemporary construction. The idea is that this residential quarter should be fully sustainable in ecological, economic and social terms. Since 2013, a number of pilot studies have been completed under the auspices of the Viva project framework thanks to financing from the Swedish Energy Agency. The various building frame alternatives that have been evaluated are precast concrete, cast in-situ concrete and solid wood, all proposed by leading commercial suppliers. The report includes a specific requirement for equivalent functions during the use phase of the building, B. An interpretation has been provided that investigates the building engineering aspects in detail, as well as an account of the results based on the social community requirements specified in Viva, durability, fire, noise and energy consumption in the Swedish National Board of Building, Planning and Housing building regulations (BBR), plus Riksbyggen’s own requirements, Sweden Green Building Council’s Environmental Building Gold (Miljöbyggnad Guld) and 100-year life cycle. Given that the alternatives have different long-term characteristics (and also that our knowledge of these characteristics itself varies), these functional requirements have been addressed by setting up different scenarios in accordance with the EPD standard EN 15978. Because Riksbyggen has specified a requirement for a 100-year life cycle, we have also opted for an analysis period of 100 years. The results show no significant differences between concrete and timber structures for the same functions during the life cycle, either for climate or for primary energy. The minor differences reported are accordingly less than the degree of uncertainty involved in the study. The available documentation on the composition of the relevant intumescent paint coating on solid wood frames differs from source to source, so it was not possible to fully allow for the significance of this. The LCA has not included functional changes in the building linked to load-bearing characteristics, noise, moisture, health or other problems that may result in increased maintenance and replacement. The concrete houses have been dimensioned for 100 years, for instance, in accordance with tried and tested standards and experience. The solid wood house is not dimensioned in the same way, and this has led to us having to assume various scenarios.The results also show the following:• The uncertainties involved in comparing different structures and alternative solutions are very significant. The results are affected by factors such as life cycle, the functional requirements taken into consideration, transportation, design and structural details, etc.• Variations in the built items and a considerable degree of uncertainty in the assumptions make it difficult to obtain significant results on comparisons. Only actual construction projects with known specific data, declared from a life cycle perspective that takes into account actual building developer requirements and involving different scenarios (best, documented and worst-case) for the user stage can currently be compared.• In the other hand, comparisons restricted to different concrete structures only, or to different timber structures only, ought to involve a lower degree of uncertainty. These would then provide results that are significant as well as improvement requirements that are relevant.• There is potential for improving concrete by imposing requirements on the material• There is potential for improving solid wood frames by developing and guaranteeing well-documented long-term characteristics for all functional requirements.The LCAs were performed as an iterative process where all parties were given the opportunity to submit their viewpoints and suggestions for changes during the course of the work. This helped ensure that all alternatives have been properly thought through.Because, during the project, Riksbyggen opted to procure a concrete frame, in the final stage the researchers involved focused on ensuring the procurement process would result in the concrete frame as built meeting the requirements set out above. As things currently stand, the material requirements for the concrete are limited by the production options open to the suppliers, and this is therefore being investigated in the manufacture of precast concrete frames for the Viva cooperative housing association.
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2.
  • Al-Ayish, Nadia, et al. (författare)
  • Klimatsmart brobyggande med dagens tillgängliga teknik – Råd och vägledning i ny rapport
  • 2017
  • Ingår i: Bygg & Teknik. ; 2017:7, s. 12-17
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Projektet visar att med ett aktivt och medvetet klimatarbete i samverkan mellan alla aktörer i värdekedjan finns det ofta möjligheter att reducera klimatbelastningen från en vanlig plattrambro med i storleksordningen 50 procent. Om klimataspekten däremot inte beaktas vid utformning och val av produkter visar projektresultaten att det finns risk att klimatbelastningen ökar med samma storleksordning
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3.
  • Al-Ayish, Nadia, et al. (författare)
  • Reducerat koldioxidutsläpp från betongbroar genom dagens tillgängliga teknik
  • 2018
  • Ingår i: Husbyggaren. - 0018-7968 .- 2002-8237. ; 1/2018, s. 15-18
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Genom aktiva val och ett medvetet klimatarbete i samverkan mellan alla aktörer i värdekedjan finns det mojligheter att reducera klimatbelastningen fran vanliga plattrambroar med storleksordningen 50 procent. Om klimataspekten däremot inte beaktas vid utformning och val av produkter visar projektresultaten att det finns risk att klimatbelastningen ökar med samma storleksordning.
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4.
  • Ekström, Daniel P T, 1976, et al. (författare)
  • Climate impact optimization in concrete bridge construction
  • 2017
  • Ingår i: IABSE Conference, Vancouver 2017. - : International Association for Bridge and Structural Engineering (IABSE). - 9783857481536 ; , s. 1161-1168, s. 1161-1168
  • Konferensbidrag (refereegranskat)abstract
    • Estimates indicate that the total climate impact, from a lifecycle perspective, generated by Swedish construction processes reaches the same magnitude as emissions from all passenger cars in Sweden. A large part of the emissions from construction of roads and railways arise from production of steel and concrete used in bridges and other infrastructure structures. In this research, several cases of existing concrete bridges have been investigated. The case studies are in a very firm way analyzed, and then opportunities for reducing climate gas emissions are described and elaborated upon. Accordingly, design and dimensioning through the use of today's technology and material selection are discussed. Without developing new ways to construct bridges, or comparing concrete with other materials, a useful guide on how to use technology and opportunities that are available for constructing climate smarter versions of standard bridges today is developed and described.
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5.
  • Kurkinen, Eva-Lotta, et al. (författare)
  • Kriterier för resurssnålt byggande i praktiken
  • 2018. - 18
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • This work includes monitoring of set criteria for low climate impact from concrete in procurement of concrete structures for brf. Viva in Gothenburg. The criteria were followed up by updating the LCA study performed during the program phase with new data for the completed building, plus a selection of the project stakeholders were also interviewed to gain an insight into how the industry received the set criteria. The work also includes a final sectionregarding the sensitivity of the calculations as well as the uncertainties/error margins and how they can be treated.Buildings that are supposed to last for 100 years will be exposed to climate change, and consequently, parallel to the LCA follow-up, energy simulations were made to see how thermal comfort and heating needs change over time.The results of the LCA follow-up and the set criteria indicate that the requirements were fulfilled for both the prefabricated concrete and the site-cast concrete. Comparing the overall climate impact between the program phase and the procured building was shown not to be possible since the construction has changed too much, for example, the heated surface area has increased by about 50%, while more materials have been used in walls and floor joints, amongst other things. A sensitivity analysis has instead been carried out showing that the contracted construction has 30% lower climate impact per BOA compared to if it was built with traditional concrete. Had the original construction details from the program stage been used for walls and floor joints, the climate impact would have been about 40% lower instead.Therefore, in future requirements, consideration should also be given to the structures and the amount of materials used, and not just to the concrete recipe as is in this case.The climate simulations show that there is probably a large number of unrecorded cases of low energy apartments that have elevated indoor temperatures in summer even in today's climate.
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  • Resultat 1-5 av 5

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