Pre-Construction AntiTermite Treatment Chemical
Chemical used for Pre-Construction AntiTermite treatment is Chlorpyrifos. For soil treatment anti-termite chemicals used are as per IS 8944 CHLORO-PYRIPHOS 20 % EC @ 1 % concentration in aqueous emulsion, Imidacloprid 30.50% SC @ 0.075 % this all are as per the recommendation in IS 8944.
For soil treatment by the process of Pre-Construction AntiTermite Treatment at the different stages of construction is as per IS to safeguard the building against termite.
Soil treatment Methods
During the Soil treatment methods by the chemical emulsions CHLORO-PYRIPHOS 20 % EC @ 1 % concentration in aqueous emulsion, Imidacloprid 30.50% SC @ 0.075 %, it should be applied uniformly at the in all the stages of the Soil treatment. It can be done by the Hand operated pressure pump or an electrically operated pump should be used for uniform spraying of the chemical from graduated containers. It should be done in the manner that proper specified quantity of chemical should be used for the required area during the operation.
If water get collected in the foundation, the water should be removed out and the chemical emulsion applied when the soil is in dry state.
There are many methods of Pre-Construction AntiTermite Treatment are mentioned below-
1. AntiTermite Treatment for Masonry Foundations and Basements
AntiTermite Treatment on the sides (up to a height of about 300 mm) of the excavations made from masonry foundations and basements should be treated with the chemical at the rate of 5 l/m2 surface area
2. AntiTermite Treatment to Vertical Backfilled Soil along masonry Foundation/AntiTermite Treatment retaining wall
After the masonry foundations treatment and the retaining wall treatment , the backfilled soil in immediate contact with the foundation structure should be treated at the rate of 7.5 l/m2 of the
Vertical surface of the sub-structure for each side. If water issued for compaction of the earth fill, the chemical treatment should be done out after the ramming operation is done by rodding the earth at 150 mm centres close to parallel to the wall surface and spraying the chemical emulsion at the above dosage. After the treatment, the soil should be filled in place.
The chemical emulsion should be done in the manner that the masonry surfaces so that the earth in contact with these surfaces, should be well treated with the AntiTermite chemical .
3. AntiTermite Treatment of top Surface of Plinth Filling
The top surface of the compacted soil filled within the plinth walls should be treated with Anti termite chemical emulsion at the rate of 5 l/m2 of the surface before the sand bed or subgrade layer is laid. This treatment should also also be done on DPC provided of plinth wall. If the filled earth has been well compacted and the earth surface does not allow the emulsion to go inside the soil then holes up to 50 to 75 mm deep at 150 mm centers both ways may be made with 12 mm diameter steel rod on the surface to allow the chemical to sweep in the soil.
4. AntiTermite Treatment at Junction of the wall and the floor
.For AntiTermite Treatment at Junction of the wall and the floor a small channel of size 30 mm x 30 mm should be made at all the junction of wall and columns with the floor before we lay the sub-grade on the soil, the holes with the help of the rod is to be made in the channel up to the ground level 150 mm apart and the iron rod should be moved backward and forward and chemical emulsion poured along the wall at the rate of 7.5 l/m2 of vertical wall or column surface. The soil should be placed back into holes after the process.
5. AntiTermite Treatment Soil along External Perimeter of Building
After the building work is complete, the soil along the external perimeter of the building or the apron area should be rodded at intervals of 150 mm and to a depth of 300 mm. The rods should be moved in the manner of backward and forward parallel to the wall to break up the earth and chemical should be put along the wall at the rate of 7.5 l/m2 of the vertical surface.
6. AntiTermite Treatment Soil Surrounding Pipes, Wastes and Conduits
When pipes, wastes and conduits placed inside the area of the foundations, soil surrounding the point of entry should be loosened around each such pipe, waste or conduit for a distance of 150 mm and to a depth of 75 mm before treatment is start. If the pipes, wastes and conduits enter the soil external to the foundation, they should be treated at a distance of over 300 mm in a same manner as in case of internal unless they are clear of the walls of the building by about 75 mm.
7. AntiTermite Treatment for Expansion Joints
The soil below these joints should receive major attention when the treatment process is done. This treatment should be done by treating through the expansion joints with the chemical after the sub-grade is laid, at the rate of 2 liters per linear meter.
8.AntiTermite Treatment to soil along the retaining wall
The soil retained by the walls (soil coming in contact with retaining wall) shall be treated at the rate of 7.5 l/m2 of the vertical surface. After The treatment the backfilling is done in stages of 30 cms but it should not exceed a depth of 1 meter.
Pre-Construction Chlorpyrifos AntiTermite Treatment Mode of measurement
Pre-Construction Chlorpyrifos AntiTermite Treatment measurement is done in in Sq. M. based on the treatment provided. (No co-efficient shall be applied)