Search for dissertations about: "hans hedlund"
Showing result 1 - 5 of 8 swedish dissertations containing the words hans hedlund.
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1. Hardening concrete : measurments and evaluation of non-elastic deformation and associated restraint stresses
Abstract : If a structural member of hardening concrete is restrained to some degree against expansion and contraction during the heating phase of the hydration process and the subsequent contraction phase, stresses will be induced. The issue of primary interest is whether or not these induced stresses will lead to cracking. READ MORE
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2. Stresses in high performance concrete due to temperature and moisture variations at early ages
Abstract : This thesis presents results from laboratory tests and numerical analyses of stress states in concrete structures arising from volume changes due to temperature and shrinkage during hydration. The laboratory tests presented here deal with: the determination of heat transfer coefficients for cooling pipes measurements of self-desiccation and shrinkage under sealed conditions deformation measurements under temperature and moisture changes and measurements of stress development during hardening for a fully restrained structural member. READ MORE
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3. Electrified Integrated Kinetic Energy Storage
Abstract : The electric car is a technically efficient driveline, although it is demanding in terms of the primary energy source. Most trips are below 50 km and the mean power required for maintaining speed is quite low, but the system has to be able to both provide long range and high maximum power for acceleration. READ MORE
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4. Early age autogenous deformation and cracking of cementitious materials – Implications on strengthening of concrete
Abstract : .... READ MORE
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5. Self-Healing Concrete
Abstract : Concrete is a brittle material prone to cracking due to its low tensile strength. Crack repairs are not only expensive and time-consuming but also increase the carbon footprint. Designing a novel concrete material possessing the ability to self-repair cracks would enhance its sustainability. READ MORE