Sökning: "Road: Pavement design"

Visar resultat 21 - 25 av 29 avhandlingar innehållade orden Road: Pavement design.

  1. 21. Performance model for unbound grnular materials pavements

    Författare :Tatek Fekadu Yideti; Björn Birgisson; Andrew Dawson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; unbound granular materials; aggregate; packing theory; gradation; primary structure; secundary structure; permanent deformation; resilient modulus;

    Sammanfattning : Recently, there has been growing interest on the behaviour of unbound granular material in road base layers. Researchers have studied that the design of a new pavement and prediction of service life need proper characterization of unbound granular materials, which is one of the requirements for a new mechanistic design method in flexible pavement. LÄS MER

  3. 22. Life Cycle Assessment of Asphalt Pavements including the Feedstock Energy and Asphalt Additives

    Författare :Ali Azhar Butt; Björn Birgisson; John Harvey; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Life Cycle Assessment; feedstock energy; asphalt binder additives; mass-energy flows; bitumen healing; wax; polymer;

    Sammanfattning : Roads are assets to the society and an integral component in the development of a nation’s infrastructure. To build and maintain roads; considerable amounts of materials are required which consume quite an amount of electrical and thermal energy for production, processing and laying. LÄS MER

  4. 23. More Roads for the Money

    Författare :Iman Mirzadeh; Björn Birgisson; George Feiger; KTH; []
    Nyckelord :;

    Sammanfattning : In order to keep the quality of the road networks at an acceptable level, large amount of investments for rehabilitation and maintenance activities are necessary in addition to investments in new and reconstructed roads. Therefore, an efficient allocation of road investment funds is of great economic importance. LÄS MER

  5. 24. Packing theory-based Framework for Performance Evaluation of Unbound Granular Materials

    Författare :Tatek Fekadu Yideti; Björn Birgisson; Denis Jelagin; Tutumluer Erol; KTH; []
    Nyckelord :;

    Sammanfattning : Enhancing the load bearing quality of granular layers is fundamental to optimize the structural performance of the pavements. Unbound granular materials are one of the most used materials in the base layers of pavements. There have been growing interests on the behavior of unbound granular material in road base layers. LÄS MER

  7. 25. Flow behavior of asphalt mixtures under compaction

    Författare :Ehsan Ghafoori Roozbahany; Manfred N. Partl; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Transportvetenskap; Transport Science;

    Sammanfattning : Asphalt compaction is one of the most important phases of road construction, being the decisive phase when the structure of the asphalt pavement layer is formed. In spite of its importance, the knowledge about this construction phase is still based on empirical and technological background and therefore surprisingly limited. LÄS MER