Sökning: "gravel road"

Visar resultat 16 - 20 av 21 avhandlingar innehållade orden gravel road.

  1. 16. Resilient and permanent deformation behavior of unbound aggregates under repeated loading

    Författare :Fredrick Lekarp; KTH; []
    Nyckelord :;

    Sammanfattning : During recent decades, growing interest in the developmentof so-called analytical or mechanistic road pavement designmethods has resulted in substantial research into themechanical behavior of the materials involved. In flexiblepavements, especially when unsurfaced or thinly surfaced,overall structural performance is largely dependent on thebehavior of the unbound granular base and subbase layers. LÄS MER

  3. 17. Animal transport and welfare with special emphasis on transport time and vibration

    Författare :Samuel Aradom Messmer; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Farm animals are transported several times during their lifetime and often long distances, and most of them are to slaughter. During transport they are exposed to a number of stress inducing factors. The main objective of the thesis work was to study the welfare of pigs, cows and bulls during transport from farm to abattoir. LÄS MER

  4. 18. Evaluation, Transformation, and Extraction of Driving Cycles and Vehicle Operations

    Författare :Peter Nyberg; Lars Nielsen; Erik Frisk; Jonas Fredriksson; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : A driving cycle is a representation of how vehicles are driven and  is usually represented by a set of data points of vehicle speed  versus time.  Driving cycles have been used to evaluate vehicles for  a long time. LÄS MER

  5. 19. Mixed-Grained Till in Pavement Structures; A Field and Laboratory Study

    Författare :Helene Kennedy; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; permanent deformation behaviour; triaxial test; pavement; till;

    Sammanfattning : The road network in Sweden has historically been constructed using rock fill and natural gravel. More than 75 per cent of the land surface of Sweden is covered by glacial till and greater utilization of site-won material will not only reduce transportation costs but will also promote better sustainability of natural assets. LÄS MER

  7. 20. Environmental assessment of bottom ash pre-treated with zero valent iron

    Författare :Mirja Nilsson; Josef Mácsik; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Waste Science and Technology; Avfallsteknik;

    Sammanfattning : Bottom ash has similar properties as crushed rocks and gravel, andcould replace some of the 40 million tonnesof virgin material used for road constructions each year.However, results presented in the literature indicate thatthe leaching of e.g. Cr, Cu, Mo, Pb and Zn can cause athreat to the sur rounding environment if the materialis used as it is. LÄS MER