Mortar Pointing
Mortar Mixes For Gun Applied Pointing
Application
For fast and efficient mechanical mortar pointing or pumping it is essential that the mortar is either pre-bagged or if using bulk materials, that it is consistently batched and mixed
Sharp sand mixes are difficult to pump as the aggregate snags and the water is squeezed out of the mix leaving a slug that blocks the gun nozzle
Pre-bagged mortars offer consistent material quality, fast mixing and application rates
Pumping aids and plasticiser admixes will improve the workability of the mortar and can be used to replace the hydraulic lime that has been traditionally used for pointing mixes
Fine Sand Mix
6 parts river bed or playpit sand
1 part cement
1 part pumping aid or plasticiser admix
Traditional Pointing Mix
6 parts soft sand
1 part cement
2 part hydrated lime
Lime Mortar Mix
3 parts sand
1 part lime putty
Mixing
The mortar must be thoroughly mixed using a paddle mixer to achieve an homogeneous and lump free mix
It is recommended that the sand is sieved before use.
A pumping aid and plasticiser is suitable in some mixes in place of lime
A mortar mix with lime can be used with sharper sand
Mixes need to be wetter if small nozzle sizes are used
MATERIAL SUPPLIERS |
|
| Pre-bagged mortars | |
| Tecroc Ltd | tel 01827 711755 |
| Pumping aid & plasticizers | |
| Sika Ltd | tel 01707 394444 |
| Feb MBT | tel 0161 7947411 |
| Lime & lime mortar | |
| Masons Mortar Ltd | tel 0131 555 0503 |