July 30, 2024
| MATERIALS | WEIGHT | RATIO BY WEIGHT |
|---|---|---|
| Portland cement | 94 lb (1 bag) | 1 |
| Water | 30 gallons | 2.5 |
| Bentonite | +/- 25 lbs. (See Notes Below) | 0.3 |
| Mix cement with water first. Then mix in the bentonite. Adjust the amount of bentonite to produce a grout with the consistency of heavy cream. If the grout is too thin, the solids and the water will separate. If the grout is too thick, it will be difficult to pump. The 28 day compressive strength of this mix is about 100 psi, similar to hard clay. The modulus is 10,000 psi. | ||