Sökning: "Capillary suction"

Visar resultat 1 - 5 av 17 avhandlingar innehållade orden Capillary suction.

  1. 1. Moisture transport processes in Scots pine - Anomalous capillary suction. Nonisothermal diffusion

    Författare :Ingemar Segerholm; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; moisture transport coefficients; nonisothermal; anomalous capillary suction; flux equation; phenomenological approach; wood;

    Sammanfattning : Moisture transport processes in wood have become increasingly important with the growing use of wood as construction material. This thesis deals with two key processes: capillary suction and nonisothermal diffusion. In the study on capillary suction, several methods were used. LÄS MER

  3. 2. Moisture transport and fixation in porous materials at high moisture levels

    Författare :Mårten Janz; Avdelningen för Byggnadsmaterial; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; building construction; water retention curve; diffusivity; suction; Moisture transport; moisture fixation; absorption; capillary transport; byggnadsteknik;

    Sammanfattning : The work presented in this thesis focuses on developing methods of measuring moisture properties at high moisture levels. Paper I deal with a new method of measuring moisture diffusivity at high moisture levels. Papers II to IV present methods of measuring moisture storage capacity as well as results from such measurements. LÄS MER

  4. 3. Transport and Sorption Phenomena in Concrete and Other Porous Media

    Författare :Björn Johannesson; Göran Fagerlund; Avdelningen för Byggnadsmaterial; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Durability; Sorption; Capillary suction; Diffusion; Convection; Concrete; Byggnadsteknik; Mixture Theory; Building construction; Byggteknik; Civil engineering; Durability; Sorption; Capillary suction; Diffusion; Convection; Concrete; Byggnadsteknik; Mixture Theory; Building construction;

    Sammanfattning : The work presented in this thesis is mainly focused on transport processes involved in service life predictions of concrete. Two papers and three reports deal with ion transport in pore solution of concrete. LÄS MER

  5. 4. Material Properties of Bulk Hydrophobic Concrete in a Nordic Environment

    Författare :Patrick Rogers; Johan Silfwerbrand; Tang Luping; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; alkyl alkoxysilane; capillary suction; chloride ingress; concrete; hydrophobic agents; triacylglycerides; Betongbyggnad; Concrete Structures;

    Sammanfattning : Concrete in its unaltered form allows the mass transfer of fluids into and out of its microstructure. These fluids can contain detrimental solutes which change the chemistry of the cement paste and/or the corrosion properties of the reinforcement bars, most noticeably hydrogen carbonates (HCO3-), oxygen (O2) and chloride ions (Cl-). LÄS MER

  7. 5. Fat contamination of pericardial suction blood in cardiac surgery : clinical and experimental studies in perspectives of transfusion logistics

    Författare :Micael Appelblad; Gunnar Engström; Krister Lindmark; Anders Jeppsson; Umeå universitet; []
    Nyckelord :Surgery; blood transfusion; cardiopulmonary bypass; pericardial suction blood; fat contamination; lipid microemboli; density separation; surface adsorption; Kirurgi; Surgery; kirurgi;

    Sammanfattning : Introduction: During cardiac surgery aided by cardiopulmonary bypass (CPB) the autotransfusion of pericardial suction blood (PSB) is regarded mandatory to limit allogeneic blood exposure. PSB is however proposed as a source of lipid microemboli and to contribute to brain damage. LÄS MER