In-Line Rheological Measurements of Cement Based Grouts Using the UVP-PD Method
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
In underground construction grouting is performed to seal tunnels and caverns against excessive water inflow or to reduce the lowering of the ground water table. The rheological properties, such as viscosity and yield stress, of the used grouts play a fundamental role in grouting. No method has been developed yet to measure these properties in-line in the field during grouting. Methods used today are rather primitive and not robust enough for field use and they are mainly performed in order to verify and fulfil stipulated quality criteria. Modern grouting rigs are today equipped with continuous measurement of flow and pressure but instruments for continuous monitoring of rheological properties and their changes with time in the field are still lacking. A relatively new method, known as ‘UVP-PD’, for continuous in-line measurements of the rheological properties of cement grouts, was tested in this work. Standard grouting equipment (UNIGROUT) and flow meter (LOGAC) was used to ensure field conditions. The objective of this work was to determine the feasibility of the ‘UVP-PD’ method for cement based grouts. After performing full scale experimental works, this method was found feasible for measuring the rheological properties of cement based grouts directly in-line.
Place, publisher, year, edition, pages
Examensarbete Jord- och bergmekanik, ISSN 1652-599X ; 10/06
Rheology, In-line measurements, Cement grouts, UVP-PD method
IdentifiersURN: urn:nbn:se:kth:diva-33878OAI: oai:DiVA.org:kth-33878DiVA: diva2:418246