Sökning: "Asphalt mixtures"

Visar resultat 11 - 15 av 28 avhandlingar innehållade orden Asphalt mixtures.

1. 11. Fundamental investigation to improve the quality of cold mix asphalt

   Författare :Abdullah Khan; Nicole Kringos; Per Redelius; Amit Bhasin; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Bitumen; Cold Asphalt Mixtures; Minerals Aggregates; Surface Free Energy; Sorption; Contact Angle; Bitumen Emulsions; Breaking and Coalescence.; Bitumen; kallblandad asfaltmassa; mineraler aggregat; fri ytenergi; sorption; kontaktvinkel; bitumenemulsion; brytning och blandning.; Transportvetenskap; Transport Science;

   Sammanfattning : Cold mix asphalt (CMA) emulsion technology could become an attractive option for the road industry as it offers lower startup and equipment installation costs, energy consumption and environmental impact than traditional alternatives. The adhesion between bitumen and aggregates is influenced by diverse parameters, such as changes in surface free energies of the binder and aggregates or the presence of moisture or dust on the surface of aggregates, mixing temperatures, surface textures (including open porosity), nature of the minerals present and their surface chemical composition, as well as additives in the binder phase. LÄS MER

3. 12. Spherical Indentation Technique for Multiscale Characterisation of Asphalt Mixtures

   Författare :Hassan Fadil; Denis Jelagin; Manfred Partl; Per-Lennart Larsson; Said Safwat; Eshan Dave; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Building Materials; Byggnadsmaterial;

   Sammanfattning : The viscoelastic properties of asphalt  mixtures  strongly  influence the  performance of flexible pavements  with respect to  their resistance to several common distress modes. Therefore, accurate measurement of these properties and their change during the service life is an important area of ongoing research. LÄS MER

4. 13. Investigations of binder rejuvenation related to asphalt recycling

   Författare :Robert Karlsson; KTH; []
   Nyckelord :bitumen; rejuvenator; diffusion; ageing; aging; asphalt recycling; FTIR-ATR; RAP; structural stability; Hansen solubility parameters;

   Sammanfattning : Investigations described in this doctoral thesis concernmaterial behaviour related to asphalt recycling. More indetail, the thesis describes development and application ofmethods for characterisation of the rejuvenation process, inwhich old and new binders are mixed. LÄS MER

5. 14. Towards frost damage prediction in asphaltic pavements

   Författare :Lisa Lövqvist; Nicole Kringos; Romain Balieu; Robert Karlsson; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; frost damage; winter damage; asphalt; pavements; micromechanical model; microstructure; freeze-thaw cycles; finite element model; Byggvetenskap; Civil and Architectural Engineering;

   Sammanfattning : Roads are subjected to mechanical loads from the traffic as well as deteriorating mechanisms originating from the surrounding environment and climate. The damage arising is particularly severe during the winter season, when for example raveling, pot holes and cracks can emerge on the surfaces of asphaltic roads. LÄS MER

7. 15. Life Cycle Assessment of Asphalt Roads : Decision Support at the Project Level

   Författare :Ali Azhar Butt; Björn Birgisson; Nicole Kringos; Susanna Toller; Stephen T. Muench; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Asphalt roads; life cycle assessment; feedstock energy; warm mix asphalt additives; green procurement; decision support; laboratory investigation; pavement design.; Byggvetenskap; Civil and Architectural Engineering; Transportvetenskap; Transport Science;

   Sammanfattning : Transport infrastructures such as roads are assets for the society as they not only ensure mobility but also strengthen society’s economy. Considerable amount of energy and materials, that include bitumen, aggregates and asphalt, are required to build and maintain roads. LÄS MER