Sökning: "Cement-based grouts"

Visar resultat 1 - 5 av 12 avhandlingar innehållade orden Cement-based grouts.

1. 1. Bleeding and Filtration of Cement-Based Grout

   Författare :Almir Draganovic; Håkan Stille; Ulf Lindblom; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Building manufacturing engineering; Byggproduktionsteknik;

   Sammanfattning : Grouting is a common method of sealing rock around tunnels to reduce or stop water inflow. Successful grouting significantly minimizes the maintenance cost and safety of the tunnel. Some questions about bleeding and penetrability of the grouts have to be examined more closely to carry out a successful grouting. LÄS MER

3. 2. Penetrability due to filtration tendency of cement based grouts

   Författare :Daniel Eklund; Håkan Stille; Gunnar Gustafson; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Construction engineering; grout; grouting; penetrability; filtration tendency; Byggnadsteknik; Building engineering; Byggnadsteknik;

   Sammanfattning : Grouting as a method of strengthening and sealing rock, soil and concrete is widely used. The possibilities of sealing structures are of great importance from both an economical and environmental point of view. The cost of grouting has in certain projects been as high as the cost for the blasting and excavation of the tunnel. LÄS MER

4. 3. On the measurement and application of cement grout rheological properties

   Författare :John Shamu; Stefan Larsson; Ulf Håkansson; Johan Funehag; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cement-based grouts; grouting; yield stress fluid YSF ; thixotropy; critical shear rate; radial flow; wall slip; Bingham model; Civil and Architectural Engineering; Byggvetenskap; Materials Science and Engineering; Teknisk materialvetenskap;

   Sammanfattning : The rheological properties of cement-based grouts play a key role in determining the final spread in grouted rock formations. Rheologically, cement grouts are known to be complex thixotropic fluids, but their steady flow behavior is often described by fitting the simple Bingham constitutive law to flow curve data. LÄS MER

5. 4. An Experimental Study to Measure And Improve the Grout Penetrability

   Författare :Ali Nejad Ghafar; Stefan Larsson; Almir Draganovic; Ulf Erik Lindblom; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Penetrability; Filtration; Erosion; Cement-based grout; Grout spread; Grout penetrability measurement; Dynamic grouting; Instantaneous variable pressure; Byggvetenskap; Civil and Architectural Engineering;

   Sammanfattning : An essential demand in any underground facility is to seal it against the water ingress to reduce the time and cost of the construction and the corresponding environmental hazards. To achieve this, obtaining sufficient grout spread is of great importance. LÄS MER

7. 5. Rock grouting design: Rheological aspects and radial flow visualizations with ultrasound

   Författare :John Shamu; Stefan Larsson; Ulf Håkansson; Liangchao Zou; Chadi El Mohtar; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cement grouts; grouting; yield stress fluid YSF ; thixotropy; critical shear rate; radial flow; wall slip; Bingham model; Cementbaserade injekteringsmedels; injektering; icke-Newtonska vätskors; tixotropi; kritisk deformationshastigheten; radiella strömning; glidning; Bingham modell; Jord- och bergmekanik; Soil and Rock Mechanics;

   Sammanfattning : The rheological properties of cement-based grouts play a crucial role indetermining the final spread in grouted rock formations. In rheological terms,cement grouts are known to be complex time-dependent yield stress fluids,but their steady flow behavior is often described by the simple Binghamconstitutive law. LÄS MER