Application of the Ultrasound Velocity Profiling+ Pressure Difference (UVP+PD) method in cement based grouts
2012 (English)Conference paper, Presentation (Other academic)
For grouting applications in underground construction, cement grouts with a water to cement ratio (w/c) typically 0.6 - 1.0 by weight, are used. Measurement of the rheological properties of the cement grouts and suspensions, consisting of a solid volume fraction up to 30 %, during field grouting operation directly in-line is of major interest from an industrial point of view. However, no such in-line monitoring device is available today. The present data recording system, to monitor and control the grouting operations in the field, are only performed by measuring the pressure and the grout volumetric flow in real time. Now for the first time, the ultrasound velocity profiling + pressure difference (UVP+PD) method has been applied directly in-line in field like conditions to determineits feasibility for cement based grouts. The experiments were performed with water to cement ratios 0.6 and 0.8 in a flow loop consisting of a standard grouting rig (UNIGROUT E22H) and LOGAC data recording system, to ensure field like conditions. The UVP+PD method was found successful to measure the rheological properties of micro fine cement suspensions during field like conditions. A further study in a laboratory based flow loop, consisting of a progressive cavity pump was also performed to measure the rheological properties during such conditions. The UVP+PD method was proven successful to obtain satisfactory and promising results and it was also found to be an effective tool for the determination of grout pump characteristics.
Place, publisher, year, edition, pages
Cement grouts, in-line rheometry, cement suspensions, UVP+PD method, grouting, cement rheology
IdentifiersURN: urn:nbn:se:kth:diva-107162OAI: oai:DiVA.org:kth-107162DiVA: diva2:574891
8th International Symposium on Ultrasonic Doppler Methods for Fluid Mechanics and Fluid Engineering, Dresden, September 19-21, 2012
QC 201212212012-12-212012-12-062012-12-21Bibliographically approved