Sökning: "diffusion in cement"

Visar resultat 1 - 5 av 22 avhandlingar innehållade orden diffusion in cement.

1. 1. 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

3. 2. Studies on the Effect of Concrete on the Chemistry in a Repository for Radioactive Waste

   Författare :Stellan Holgersson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; radioactive waste; diffusion in grano-diorite; organic degradation products; sorption onto cement; alkaline degradation of grano-diorite; diffusion in cement;

   Sammanfattning : In Sweden, the disposal method for long-lived low- to intermediate-level radioactive waste is proposed to be the long-term storage of the waste in a concrete repository deep in a geological formation. The use of concrete and steel for the waste containment will affect the chemical conditions inside the repository and in the host rock. LÄS MER

4. 3. Mercury immobilization : a requirement for permanent disposal of mercury waste in Sweden

   Författare :Margareta Svensson; Bert Allard; Anders Düker; Björn Öhlander; Örebro universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mercury; mercury sulphide; cinnabar; stabilization; solidification; encapsulation; monolith leaching; solubility; mercury speciation; diffusion; apparent diffusion coefficient; Chemistry; Kemi; Enviromental Science; Miljövetenskap;

   Sammanfattning : The Swedish Government states that mercury in the Swedish industry and private use shall be collected and waste containing more than 1% of mercury shall be conditioned for permanent storage in proposed groundwater-saturated repository in deep bedrock. The owners of mercury waste in Sweden are responsible for finding ways to the conversion of the mercury waste to insoluble forms. LÄS MER

5. 4. Studies of the efficiency of granulated blast furnace slag and limestone filler in mortars - long term strength and cloride penetration

   Författare :Dimitrios Boubitsas; Avdelningen för Byggnadsmaterial; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; k-value; beständighet; durability; kloridinträngning; cement; limestone filler; bruk; långtidsegenskaper; kalksten; chloride diffusion; slagg; chloride migration; compressive strength; granulated blast furnace slag;

   Sammanfattning : This report is the first part of the project Use of industrial by-products and filler in concrete - long term properties/durability. The aim is to improve the knowledge of long term properties/durability of cement and concrete produced using industrial by-products/fillers in order to promote an efficient, safe, reliable and increased use of such types of materials. LÄS MER

7. 5. Experimental studies of sorption and transport of moisture in cement based materials with supplementary cementitious materials

   Författare :Mahsa Saeidpour; Avdelningen för Byggnadsmaterial; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cement; Concrete; Moisture transport; Hysteresis; Supplementary cementitious materials; Water vapor sorption; Sorption isotherms; Anomalous sorption;

   Sammanfattning : Most deterioration processes in cement based materials are closely related to moisture sorption and moisture transport properties. Therefore, it is important to study these properties, both theoretically and practically. This work is an experimental investigation in this field. LÄS MER