The following describes the procedure for filling core sonic pipes with cement grout. Prepare the mix as per the proposed mix design given below using following equipment’s:
- Mixer
- Piston Pump
- Grout hose of suitable length
Grout Mix Design For Filling Core Sonic Pipes
For Grout Strength 30N/mm2
| Mix Design | OD Weights |
| MSRC (Type II) | 1420 kg/m3 |
| Microsilica | 70 kg/m3 |
| Free Water | 510 ltr/m3 |
| Super Plasticizer (Conplast-SP432) | 7 ltr/m3 |
| Fresh concrete density | 2000 kg/m3 |
For 100 Liter Mix
| Mix Design | OD Weights |
| MSRC (Type II) | 142 kg |
| Microsilica | 7 kg |
| Free Water | 51 ltr |
| Super Plasticizer (Conplast-SP432) | 0.7 ltr |
For 100 kg Cement
| Mix Design | OD Weights |
| MSRC (Type II) | 100 kg |
| Microsilica | 5 kg |
| Free Water | 36 ltr |
| Super Plasticizer (Conplast-SP432) | 0.5 ltr |
GROUT MIX DESIGN (Alternative)
Grout Mix Design For Filling Core Sonic Pipes
For 100 kg cement
| Mix Design | OD Weights |
| Cement | 100 kg |
| Dune Sand | 88 kg |
| Microsilica (ELKEM) | 3 Kg |
| Free Water | 35 ltr |
| Super Plasticizer (Conplast-SP432) | 1.5 ltr |
Grout Strength: 30 N/mm2
Filling Core Sonic Pipes
- The grout has to be mixed for at least 5 minutes using Bauer’s mixer and piston pump.
- The grout hose will be connected at one end to the piston pump and the other end to the bottom of sonic pipe.
- The grout will then be allowed to slowly and continuously flow to the core sonic pipes through the grout hose.
- At the same time of pouring of grout, the grout hose has to be pulled up in a similar way as done in the tremie method.
- The quantity of grout entering the sonic pipe can be measured by counting the strokes of the piston pump (1 stroke = 0.3 ltrs of grout).