Search for dissertations about: "Andrzej Cwirzen"

Showing result 1 - 5 of 9 swedish dissertations containing the words Andrzej Cwirzen.

  1. 1. Shrinkage and Related Properties of Alkali-Activated Binders Based on High MgO Blast Furnace Slag

    Author : Abeer Humad; Andrzej Cwirzen; John L. Provis; Karin Habermehl-Cwirzen; Andrzej Garbacz; Luleå tekniska universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Alkali-activated slag; alkali-activated materials; high-MgO blast furnace slag; shrinkage; creep; carbonation; strength; heat curing; Byggmaterial; Building Materials;

    Abstract : Concrete is the second most used material in the world just after water. A drawback is that it is mostly based on Portland cement, which has an extremely high carbon footprint reaching a staggering 900 kg/tonne. The carbon dioxide emissions related to the production of the Portland cement accounts for nearly 8 % of the global total. READ MORE

  2. 2. Early age autogenous deformation and cracking of cementitious materials – Implications on strengthening of concrete

    Author : Katalin Orosz; Andrzej Cwirzen; Hans Hedlund; Andrzej Garbacz; Luleå tekniska universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; concrete; mortar; strengthening; composites; shrinkage; autogenous deformation; alkali activated materials; alkali activated slag; Structural Engineering; Konstruktionsteknik;

    Abstract : .... READ MORE

  3. 3. Self-Healing Concrete

    Author : Magdalena Rajczakowska; Andrzej Cwirzen; Karin Habermehl-Cwirzen; Hans Hedlund; Erik Schlangen; Luleå tekniska universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cementitious materials; self-healing; exposure; fly ash; calcite; C-S-H; cracking; Byggmaterial; Building Materials;

    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

  4. 4. Aggregates in Concrete Mix Design

    Author : Yahya Ghasemi; Mats Emborg; Andrzej Cwirzen; Martin Nilsson; Gram Hans-Erik; Hans-Erik Gram; Luleå tekniska universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mix design; water layer theory; particle packing; aggregates; specific surface area; Byggproduktion; Construction Engineering and Management;

    Abstract : The importance of studying the behaviour and properties of concrete can be highlighted by considering the fact that concrete is the most used man-made material in the world. The very first step in making concrete is its mix design and deciding the type and amount of constitutes used in the production of concrete which should fulfil the requirements of the final product. READ MORE

  5. 5. Flowability and proportioning of cementitious mixtures

    Author : Yahya Ghasemi; Mats Emborg; Andrzej Cwirzen; Martin Nilsson; Stefan Jacobsen; Luleå tekniska universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Particle packing; excess layer theory; mix design; Structural Engineering; Konstruktionsteknik;

    Abstract : Understanding the role of constituents of cementitious mixtures as the most globally used human-made material and their effect on the flowability of the blends is of great importance. A comprehensive understanding of the ingredients of mixtures allows for optimized proportioning of constituents and can lead to a reduction in cement and water demand of the blends. READ MORE