Sökning: "cement paste"

Visar resultat 1 - 5 av 25 avhandlingar innehållade orden cement paste.

  1. 1. Moisture permeability of mature concrete, cement mortar and cement paste

    Författare :Göran Hedenblad; Avdelningen för Byggnadsmaterial; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; moisture transport; cement paste; moisture permeability; concrete; moisture flow; cement mortar;

    Sammanfattning : Moisture permeability tests were performed on specimens of concrete, cement mortar and cement paste with the bottom side in water or in moist air and the upper side in a relative humidity of 33 %. The distribution of the relative humidity within the specimen was measured, at stationary conditions, as well as the amount of water which pass through the specimen. LÄS MER

  3. 2. Binding of moisture in fly ash blended Portland cement paste and mortar : Impact of replacement level and curing temperature

    Författare :Oskar Linderoth; Avdelningen för Byggnadsmaterial; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cement; Mortar; Water vapor sorption; Supplementary cementitious materials; Fly ash; Hydration; Thermogravimetric analysis; X-ray diffraction; Rietveld analysis;

    Sammanfattning : .... LÄS MER

  4. 3. Structure of Hardened Cement-Fly Ash Systems and Their Related Properties

    Författare :Aimin Xu; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; water vapour sorption isotherms; thermogravity analysis; mortar; scanning electron microscopy; differential thermal analysis; X-ray diffraction analysis; fly ash; pore structure; microstructure; cement paste;

    Sammanfattning : The influence of fly ash on the pore structure and microstructure of cement paste and mortar has been investigated. The methods applied include water vapour sorption isotherms, scanning electron microscopy, X-ray diffraction analysis and thermogravity/differential thermal analysis. LÄS MER

  5. 4. A Study on the Mechanism of Plastic Shrinkage of Cement-Based Materials

    Författare :Adrian Radocea; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; capillary pressure; shrinkage; climatic conditions; cement;

    Sammanfattning : The work presented in this thesis has been concentrated on describing the mechanism of plastic shrinkage and on developing a method of calculating the progress of plastic shrinkage. The origin of plastic shrinkage and plastic shrinkage induced cracks has been investigated by many researchers during the last four decades, but no generally accepted theory could be found in the literature. LÄS MER

  7. 5. Mechanisms of salt frost scaling on portland cement-bound materials: studies and hypothesis

    Författare :Sture Lindmark; Avdelningen för Byggnadsmaterial; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Deterioration; Durability; Freeze-Thaw; Frost; Salt; Mechanism; Chloride; Diffusion; Adsorption; Building construction; Cement; Concrete; Byggnadsteknik;

    Sammanfattning : A hypothesis regarding the mechanism causing salt frost scaling on Portland cement-bound materials is described. It is assumed that deterioration is due to osmotic micro ice body growth, as has been previously proposed for frost deterioration of moisture-isolated specimens of cement-bound materials. LÄS MER