Sökning: "curing"

Visar resultat 21 - 25 av 141 avhandlingar innehållade ordet curing.

  1. 21. Development of strength and heat of hydration of young concrete at low temperature - influence of granulated blast furnace slag, silica and limestone

    Författare :Monica Lundgren; Avdelningen för Byggnadsmaterial; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; låga temperaturer; värmeavgivning; betong; betonggjutning; hållfasthet; hydratation;

    Sammanfattning : The work presented in this licentiate thesis was carried out within the project task Use of industrial by-products and filler in concrete, part Early-age strength development at low temperatures in concrete with mineral additions/fillers. To improve the understanding and to increase the data available, the study investigated the development of compressive strength and heat of hydration while curing at 5°C compared with curing at 20°C. LÄS MER

  3. 22. Synthesis and characterisation of thermoset-clay nanocomposites

    Författare :Xavier Kornmann; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polymera konstruktionsmaterial; Polymeric Composite Materials;

    Sammanfattning : Polymer-clay nanocomposites are materials reinforced on a molecular scale by 1 nm-thick clay layers dispersed in a polymer matrix. Thermoset-clay nanocomposites were synthesised from unsaturated polyester and epoxy resins with two different approaches. LÄS MER

  4. 23. Variables affecting stress development and resin conversion in light-cured dental composites

    Författare :Nazanin Emami; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machine Elements; Maskinelement; Polymeric Composite Materials; Polymera konstruktionsmaterial;

    Sammanfattning : The general aim of this dissertation was to identify and investigate factors that can be used to minimize stress development in light cured dental resins without compromising the conversion level of the polymer. Modulus of elasticity, polymerization contraction strain, degree of conversion and shrinkage of light-cure dental composites were determined after curing with three different light power densities where total irradiated energy (J/cm2) kept constant. LÄS MER

  5. 24. Radiation crosslinking of cellulose fibers to obtain rigid lightweight paperboard

    Författare :Mikaela Börjesson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Paper; Modification; Ester; Crosslinking; Cellulose; UV radiation; Acrylates; Packaging;

    Sammanfattning : Cellulosic materials are used in a wide range of areas of application, and one of these is paperboard for packaging solutions. Paper or paperboard as a packaging material has benefits like low density, low costs, high stiffness, good printability, and paper is environmentally friendly. LÄS MER

  7. 25. Influence of the Processing Atmosphere on Binder Jetting of Stainless Steel: From Printing to Sintering

    Författare :Kai Zissel; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Carbothermal Reduction; Powder Reusability; 17-4 PH; Oxidation; Binder Jetting; Debinding; Sintering; Additive Manufacturing; Processing Atmosphere; Stainless Steel;

    Sammanfattning : Binder Jetting (BJT) is considered a promising Additive Manufacutring (AM) technology for the production of complex metal components due to its high productivity and cost efficiency compared to other AM technologies. The BJT technology is a multi-step process that consists of printing, curing, depowdering, debinding and sintering. LÄS MER