Browsing NTNU Open by Author "Wåhlin, Johan"

Now showing items 1-11 of 11

    • Chemical Frost Protection of Road Surfaces: A Laboratory Investigation 

      Fjærestad, Janne Siren; Klein-Paste, Alex; Wåhlin, Johan (Peer reviewed; Journal article, 2020)
      Anti-icing chemicals are commonly used to protect against hoar frost formation on roadways and bridges. Because of their negative impact on both environment and infrastructure, their use should be optimized. During conditions ...

    • The effect of rolling resistance on winter cycling 

      Fenre, Mathis Dahl (Doctoral theses at NTNU;2021:287, Doctoral thesis, 2021)
      Authorities in many countries facilitate increased bicycle use in urban areas due to its numerous benefits. Still, the number of bicycle trips drops drastically during the wintertime, especially in areas with harsh winters. ...

    • Effect of Sugar as an Additive on the Longevity of Salt on Pavements 

      Ebersten, Roger Berge (Master thesis, 2015)
      In winter maintenance of roads chemicals are applied to the road with the aim of ensuring that the friction is at an acceptable level so that the road is safe and accessible. Sodium chloride is a common used chemical due ...

    • Experimental Setup Simulating Hoarfrost Formation on Roadways 

      Fjærestad, Janne Siren; Wåhlin, Johan; Klein-Paste, Alex (Peer reviewed; Journal article, 2020)
      Hoarfrost on roadways and bridges can cause slippery and dangerous conditions for motorists. To reduce the costs and environmental impact of countermeasures, road authorities wish to optimize their winter maintenance ...

    • Hoar frost formation on a salted road surface 

      Fjærestad, Janne Siren (Doctoral theses at NTNU;2020:239, Doctoral thesis, 2020)
      Hoar frost formation may lead to slippery driving conditions during late autumn and winter time. Hoar frost formation occurs when humidity in the air deposits directly as ice on the cold road surface. To avoid slippery ...

    • Influence of NaCl Aqueous Solution on Compacted Snow: Field Investigation 

      Giudici, Henri; Klein-Paste, Alex; Wåhlin, Johan (Peer reviewed; Journal article, 2020)
      Slippery road surfaces are a threat to traffic safety, especially in winter when snow falling on roads forms a hard crust that is extremely difficult to remove. To prevent this hard crust formation, salt is applied to ...

    • Measuring melting capacity with calorimetry - Low temperature testing with mixtures of sodium chloride and magnesium chloride solutions 

      Delapaz, Michele Ann (Master thesis, 2015)
      Salt application is an important part of winter maintenance activities. As the use of salt increases, there is a need for usage optimization due to environmental impacts. For deicing purposes an important property is the ...

    • Melting ice with salt - a thermodynamic model 

      Potapova, Julia (Master thesis, 2012)
      Road salting forms an essential element in the winter maintenance of roads. With salt usage increasing there is a need for an optimizing of salt practices. This master thesis is focused on the melting of ice below 0°C with ...

    • The effect of aqueous solutions on compacted snow hardness 

      Wåhlin, Johan (Doctoral thesis at NTNU;2014:255, Doctoral thesis, 2014)
      Snow falling on roads rapidly compacts into a hard crust. The crust is difficult to remove mechanically and it often becomes slippery. To avoid crust formation, chemicals are often applied in a measure termed anti-compaction. ...

    • The Effect of Pavement Texture on Need for Salt in Winter Maintenance of Bicycle Roads 

      Husa, Veronika Ludvigsen (Master thesis, 2017)
      In Trondheim, Norway, an increase in winter maintenance standard of bicycle roads has caused some damages, and it has become clear that the bicycle roads have a large variation in quality and use of material along short ...

    • The relation between sea ice thickness and freeboard in the Arctic 

      Alexandrov, Vitaly; Sandven, Stein; Johannessen, Ola M; Wåhlin, Johan (Journal article; Peer reviewed, 2010)
      Retrieval of Arctic sea ice thickness from CryoSat-2 radar altimeter freeboard data requires observational data to verify the relation between these two variables. In this study in-situ ice and snow data from 689 observation ...