Search for dissertations about: "cement"

Showing result 21 - 25 of 261 swedish dissertations containing the word cement.

2. 21. Portland Cement Clinker - Composition and Hydration

   Author : Anna Emanuelson; Centrum för analys och syntes; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Inorganic chemistry; mineralisation; hydration; polymorphism; substitutions; ferrite; aluminate; belite; alite; Portland cement clinker; phase analysis; Oorganisk kemi; Material technology; Materiallära; materialteknik;

   Abstract : The crystal structures of the main Portland cement clinker phases are reviewed and two anion centered models of Ca3SiO5 and Ca2SiO4 are presented. The effects of minor elements on the clinkering process, and on the qualitative and quantitative phase compositions of Portland cement clinker are discussed. READ MORE

4. 22. Non-ionic contrast media in acrylic bone cement

   Author : Fred Kjellson; Lund Ortopedi; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; traumatology; Kirurgi; ortopedi; traumatologi; Material technology; Materiallära; materialteknik; PMMA; Bone cement; particle size; contrast media; radiopacity; iohexol; iodixanol; Clinical physics; radiology; tomography; medical instrumentation; Klinisk fysiologi; radiologi; tomografi; orthopaedics; Surgery; medicinsk instrumentering;

   Abstract : Non-ionic, water-soluble, contrast media, iohexol and/or iodixanol, have been investigated for use in acrylic bone cement aimed for arthroplasty. Bone cement, containing the new particulate contrast media , was investigated for: quasi-static mechanical properties, water uptake properties, release of contrast media from the bone cement, biological responses from particulate bone cement, polymerisation reaction, polymerisation temperature, glass transition temperature, injectability and penetration into human cancellous bone, and radiopacity. READ MORE

5. 23. Sustainability measures in quicklime and cement clinker production

   Author : Matias Eriksson; Rainer Backman; Dan Boström; Flemming Frandsen; Umeå universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; limestone; quicklime; cement clinker; sustainability; oxygen; carbon dioxide; thermal decomposition; dynamic rate thermogravimetry; predictive multicomponent chemical equilibrium calculations; mineral carbonation;

   Abstract : This thesis investigates sustainability measures for quicklime and cement clinker production. It is the aim of this thesis to contribute to the effort of creating a more sustainable modus of industrial production. READ MORE

6. 24. Orthogeriatric anaesthesia - studies on the bone cement implantation syndrome, risk prediction and intraoperative haemodynamics

   Author : Fredrik Olsen; Göteborgs universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; bone cement implantation syndrome; cemented hip hemiarthroplasty; bone cement; Nottingham hip fracture score; cardiac output monitoring; continuous spinal anaesthesia;

   Abstract : The bone cementation implantation syndrome (BCIS), as seen in orthopaedic patients, is characterised by intraoperative hypotension and hypoxia and loss of consciousness around the time of bone cementation. In a retrospective study, the incidence of and risk factors for the BCIS and its impact on mortality during cemented hemiarthroplasty for hip fracture were evaluated. READ MORE

7. 25. Phase development, heat of hydration and expansion in a blended cement with b-hemihydrate and anhydrite as calcium sulfate

   Author : Cecilie Evju; Centrum för analys och syntes; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; dilatation; isothermal calorimetry; in-situ synchrotron powder diffraction; ettringite; calcium sulfate; Shrinkage compensating cement; expansive cement; Materiallära; Material technology; materialteknik;

   Abstract : Expansive cements are utilised in special applications to improve properties such as cracking caused by drying shrinkage. Several types of expansive cements exist and the main hydration product responsible for the expansion is ettringite, [Ca3Al(OH)6]2(SO4)3·26H 2O. READ MORE