Sökning: "calcite"

Visar resultat 1 - 5 av 54 avhandlingar innehållade ordet calcite.

  1. 1. Self-Healing Concrete

    Detta är en avhandling från Luleå tekniska universitet

    Författare :Magdalena Rajczakowska; Luleå tekniska universitet.; [2019]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cementitious materials; self-healing; exposure; fly ash; calcite; C-S-H; cracking; Byggmaterial; Building Materials;

    Sammanfattning : 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. LÄS MER

  2. 2. REACTIVE TRANSPORT MODELLING OF DISSOLVED CO2 IN POROUS MEDIA Injection into and leakage from geological reservoirs

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Nawaz Ahmad; KTH.; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CO2 geological storage and safety; leakage of brine saturated with dissolved CO2; reactive transport; fracture; advection; dispersion and diffusion; sorption; carbonate minerals kinetic reactions; calcite; dolomite; siderite; porosity; permeability; heat transport; Mark- och vattenteknik; Land and Water Resources Engineering;

    Sammanfattning : The geological sequestration of carbon dioxide (CO2) is one of the options of controlling the greenhouse gas emissions. However, leakage of CO2 from the storage reservoir is a risk associated with geological sequestration. Over longer times, large-scale groundwater motion may cause leakage of dissolved CO2 (CO2aq). LÄS MER

  3. 3. Cryptic Orogeny uplift of the Al Hajar Mountains at an alleged passive margin

    Detta är en avhandling från Stockholm : Department of Geological Sciences, Stockholm University

    Författare :Reuben Johannes Hansman; Stockholms universitet.; [2018]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; uplift; mountains; structural; low-temperature; thermochronology; dating; fission-track; U-Th He; U-Pb; calcite; structure-from-motion; photogrammetry; UAV; trishear; fault-propagation; Hafit; Al Hajar Mountains; United Arab Emirates; Oman; Geology; geologi;

    Sammanfattning : Mountains evolve and grow because of the large forces that occur from the collision of tectonic plates. Plate boundaries change and move through time, and regions that were once stable, shallow-marine environments can be dragged into subduction zones and get transformed into vast mountain ranges. LÄS MER

  4. 4. Split flotation of calcite from wollastonite and microcline Jokkmokk calcite rich wollastonite ore

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Huang Fugen; [1989]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mineral Processing; Mineralteknik;

    Sammanfattning : .... LÄS MER

  5. 5. Arctic Ocean benthic foraminifera preservation and Mg/Ca ratios Implications for bottom water palaeothermometry

    Detta är en avhandling från Stockholm : Department of Geological Sciences, Stockholm University

    Författare :Natalia Barrientos; Stockholms universitet.; [2018]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Arctic Ocean; benthic foraminifera; Mg Ca-temperature; calcite preservation; maringeologi; Marine Geology;

    Sammanfattning : Reconstructions of Arctic Ocean palaeotemperatures are needed to disentangle natural variability from anthropogenic changes and understand the role of ocean heat transport in forcing or providing feedbacks on Arctic climate change. Despite known complications with calcareous microfossil preservation in Arctic Ocean sediments, calcareous benthic foraminifera can be common in interglacial sequences. LÄS MER