Sökning: "concrete"

Visar resultat 16 - 20 av 1184 avhandlingar innehållade ordet concrete.

  1. 16. Durability of fire exposed concrete : Experimental Studies Focusing on Sti„ffness & Transport Properties

    Författare :Joakim Albrektsson; Johan Silfwerbrand; Lars Boström; Manouchehr Hassanzadeh; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Concrete; Fire; Polypropylene fibres; Durability; Tunnel; Damage assessment; Ultrasonic pulse velocity; Water absorption; Chloride migration; DIC; Byggvetenskap; Civil and Architectural Engineering;

    Sammanfattning : Road and rail tunnels are important parts of the modern infrastructure. High strength concrete (HSC) is commonly used for tunnels and other civil engineering structures, since it allows high load carrying capacity and long service life. In general, Swedish road and rail tunnels should be designed for a service life of 120 years. LÄS MER

  3. 17. Material Properties of Bulk Hydrophobic Concrete in a Nordic Environment

    Författare :Patrick Rogers; Johan Silfwerbrand; Tang Luping; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; alkyl alkoxysilane; capillary suction; chloride ingress; concrete; hydrophobic agents; triacylglycerides; Betongbyggnad; Concrete Structures;

    Sammanfattning : Concrete in its unaltered form allows the mass transfer of fluids into and out of its microstructure. These fluids can contain detrimental solutes which change the chemistry of the cement paste and/or the corrosion properties of the reinforcement bars, most noticeably hydrogen carbonates (HCO3-), oxygen (O2) and chloride ions (Cl-). LÄS MER

  4. 18. Chemical interactions in concrete systems

    Författare :Susanne Börjesson; Chalmers tekniska högskola; []
    Nyckelord :diffusion; caesium; geochemical modelling; concrete; iodine; actinides; sorption; solid solution;

    Sammanfattning : .... LÄS MER

  5. 19. Moderate Nominalism and Moderate Realism

    Författare :Christer Svennerlind; Göteborgs universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; analytic ontology; moderate nominalism; moderate realism; particular; universal; abstract; concrete; abstract particular; abstract universal; concrete particular; concrete universal; trope; moment; complex unity; collection; instance; unit attribute; intensional aspect; predicational aspect; continuous composite; articulated composite;

    Sammanfattning : The subject matter of this thesis is analytic ontology. Chapters II and III deal with two versions of trope theory, or moderate nominalism; these are defined as ontologies which recognise properties and relations but no (real) universals. The key notion of both theories, trope, is characterised as an abstract particular. LÄS MER

  7. 20. Design of concrete pavements : design criteria for plain and lean concrete

    Författare :Johan Söderqvist; Johan Silfwerbrand; Anders Lenngren; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Building engineering; Byggnadsteknik;

    Sammanfattning : New road infrastructure projects are important and constitute of large investments that have to serve the society for a long time. The investments have to be durable at the lowest life cycle cost and the pavements have to sustain loads from increasing traffic intensity and heavy traffic loads. LÄS MER