ROCKGROUT- SIMULATOR- by A.C.Houlsby. Easy hole 1-45 hours to Refusal. Hole A

GROUTING AN EASY, FAIRLY AVERAGE,
WELL BEHAVED HOLE

AFTER 0145 HOURS FROM START

After 0145 hours the rate of injection has slowed down to a refusal by 0245 hours. In this period the very small quantities of grout being injected are mainly to compensate for water bled out from the grout.The grout has largely ceased to move and has started to develop thixotropic stiffening.

SUMMARY OF APPLICATION SO FAR - at 0250 hours
Water:cement ratio = 2:1. Pressure = 25 psi [2 bar]
Total cement injected so far:

0.81 bags by 0015 hours

1.45 bags by 0030

1.61 by 0045

1.53 by 0100

1.13 by 0115

0.65 by 0130

0.40 by 0145

0.32 by 0200 (in 0.80 cu ft [21 litres] of grout)

0.20 by 0215 (in 0.50 cu ft [13 litres] of grout)

0.12 by 0230 (in 0.30 cu ft [8 litres] of grout)

NIL by 0245

= 8.22 bags total

The sketch shows the situation up to refusal at 0245 hours

Making changes at this stage would be futile.
So go to refusal

GROUTING AN EASY, FAIRLY AVERAGE, WELL BEHAVED HOLE

AFTER 0145 HOURS FROM START

GROUTING AN EASY, FAIRLY AVERAGE,
WELL BEHAVED HOLE