GROUT

GROUTS AND CEMENTITIOUS SUSPENSIONS

 

 

 

Photo of a typical grouting rig (left) and grouting in the field (right)

BENEFITS

 

  • In-line measurement of grout rheology
  • Flow visualization and velocity profile measurements
  • In-line determination of yield stress
  • Improve grouting results by adjusting steering parameters in real-time
  • Monitor time-dependent behaviour of grouts
  • Adjust w/c ratio according to rock conditions

Measurements of the viscosity of non-Newtonian fluids and suspensions having a solid volume fraction of about 30% or more is of major interest from an industrial point of view. Cement paste and cement grouts for injection grouting applications, with water to cement ratios typically in the range of 0.4 and 0.6 - 0.8 by weight, are two examples of industrial fluid systems. No in-line techniques are available on the market that can be used to measure complex rheology for these fluid systems and under realistic field conditions.

Our developed technology has now been optimized for cement-based grouts measured under field-like conditions. The new electronics features simultaneous acquisition and on-board processing of ultrasound, pressure and temperature signals for real-time velocity estimation and rheological characterization. The results show that the new system combined with the non-invasive sensor technology allows true in-line flow visualization and can be used for measurement of the rheological properties continuously and non-invasively in-line during a practical grouting operation.

Measured spectra of grout suspensions with w/c=0.8 and w/c=0.6.

RHEOGRAM - GROUT w/c = 0.8

Our ILR instrument was in this example used to measure velocity profiles, yield stress and viscosity of cement grout suspensions with a water cement ratio w/c = 0.8.

 

 

RHEOGRAM - GROUT w/c = 0.6

Our ILR instrument was in this example used to measure velocity profiles, yield stress and viscosity of cement grout suspensions with a water cement ratio w/c = 0.6.

INCIPIENTUS ULTRASOUND FLOW TECHNOLGIES AB

Frans Perssons Väg 6, SE-412 76 Gothenburg, Sweden

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Prodly associated with RI.SE-Research Institutes of Sweden