Search for dissertations about: "KTH"

Showing result 21 - 25 of 9447 swedish dissertations containing the word KTH.

  2. 21. Structural behaviour of shotcrete in hard rock tunnels

    Author : Andreas Sjölander; Anders Ansell; Richard Malm; Fredrik Johansson; Eivind Grøv; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; shotcrete; structural behaviour; material models; rock support; bond strength; fibre-reinforcement; Concrete Structures; Betongbyggnad;

    Abstract : Tunnels in hard and jointed rock are normally excavated in an arch shape to enable the rock mass to support its weight. Since the beginning of the 1980's, fibre reinforced shotcrete (FRS) in combination with rock bolts have been the dominating support method for hard rock tunnels. READ MORE

  4. 22. Study of solid oxide systems from first principles calculations : energetics and magnetic properties of native defects and dopants in ZrO2 and MgO

    Author : Cecilia Århammar; Rajeev Ahuja; KTH; []
    Keywords : ;

    Abstract : .... READ MORE

  5. 23. IronArc a New Process for Pig Iron Production : A Numerical and Experimental Investigation Focusing on Mixing

    Author : Kristofer Bölke; Mikael Ersson; Pär Jönsson; Stein Tore Johanssen; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mixing time; Penetration depth; CFD simulations; IronArc; Water modeling; Mixing time Experiments; Omrörningstid; Penetrationsdjup; CFD simuleringar; IronArc; Vattenmodellering; Omrörningsexperiment; Metallurgical process science; Metallurgisk processvetenskap;

    Abstract : I den här studien så var syftet att undersöka omrörningen och relaterade fenomen i den nyutvecklade IronArc processen. Processen använder sig av gasinjektion genom plasmageneratorer för att smälta och reducera en slagg bestående av järnoxid. READ MORE

  6. 24. Advanced Functional Materials for Intermediate-Temperature Ceramic Fuel Cells

    Author : Zhan Gao; Bill Bergman; Mogens Mogensen; Ceramics; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : Low to intermediate-temperature solid oxide fuel cell (SOFC, 500 oC-700 oC) based on doped ceria (DCO) electrolyte has attracted much attention during the last decade. However, DCO suffers from electronic conduction caused byreduction of Ce (IV) to Ce (III) at high temperatures and low oxygen partial pressures and has a high grain-boundary resistivity. READ MORE

  7. 25. Studies of Steel/Slag Equilibria using Computational Thermodynamics

    Author : Lina Kjellqvist; Bo Sundman; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; steel slag equilibria; thermodynamic modelling; thermodynamic assessment; CALPHAD; phase diagram; Thermo-Calc; Other materials science; Övrig teknisk materialvetenskap;

    Abstract : The main focus in the present work concerns calculations on steel/slag equilibria. Thermodynamic software and databases are now powerful and accurate enough to give reliable results when applied to complex metallurgical processes. One example is the decarburization process of high alloyed steels. READ MORE