Hole Preparation: For optimum performance, the holes must be dust free and rough sided. Rotary drilling is recommended followed by flushing with air or water.
Rod Preparation: The rods shall be cleaned to be free of rust, flakes, oils, grease, etc.
Mixing and Placing: Mixing of one pack should be done in a single operation. Placing should be done within the gel time, which decreases with an increase in temperature. Smooth, even consistency of grout should be ensured before placing. The following table may be used as a guideline for judging the gel time.
| Temp. range (in0C) |
Gel time range (in Min) |
Minimum time before loading (in Hours) |
| 20-30 |
40-80 |
3-7 |
| 30-49 |
15-40 |
1-3 |
Hole Diameter and Depth: The following table may be used as a guideline for deciding hole diameter for drilling.
| Rod dia in mm |
Hole dia in mm |
| 8 |
16 |
| 12 |
20 |
| 16 |
20 |
| 20 |
25 |
| 25 |
32 |
| 32 |
38 |
| 40 |
45 |
Hole depth may be decided based on the pull out strength of TEC GROUT PGA which can be derived from the following extract of a Test Report.
| Sample No. |
Depth of 12mm RTS embedded in concrete |
Diameter of Drilled hole |
Contact area in mm2 |
Ultimate load in KN |
Calculated bond stress in mm2 |
| 1 |
100mm |
20mm |
6283.185 |
38.00 |
6.048 |
| 2 |
100mm |
20mm |
6283.185 |
36.80 |
5.857 |
Compressive Strength
| Initial Set (at minimum loading time) |
20N/mm2 |
| Final setting (after 7days curing at RT) |
70N/mm2 |