Assume that the hole takes 12.05 cu ft of grout [ 340 litres] in this period.
The rate of take of grout continues to decrease but evidently there are still plenty of well open cracks able to pass this very thick mix.
SUMMARY OF APPLICATION SO FAR - at 1 hour, 30 minutes:
Permeability before grouting is more than 100 lugeons (high)
Water:cement ratio = 0.5:1. Pressure builds up to 12 psi [0.8 bars]
Total cement injected so far
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