In case of leakages in the base slab, socketing work should be done in the following manner.
Fill up the W.C. slab with 7 cm of water (after plugging trap hole), preferably a day before.
Keep the slab filled with water overnight (i.e. for at least 12 hours).
Check for any leakage in base slab or underneath, the next morning.
If a major leakage is observed, locate the spot with porous concrete and provide a socket for grouting. In addition, provide four sockets at each corner of the slab. Grout the sockets with cement slurry, with consumption rate of 1 bag of cement to 75 to 100 liters of water. To spread the slurry in the porous portion of the concrete, it is required to flow the slurry with velocity. It can be achieved by passing the slurry with velocity. It can be achieved by passing the slurry through G.I. pipe with a head of about 1.5 m to 2.0 m or by using the pressure pump.
If there is a minor leakage in the base slab, put the cement slurry (rala) directly over the base slab with the help of a trowel and brush spread this slurry all over the base area of W.C.
It is further understood that the process of socketing and grouting is to be continued until the leakage in the base slab is totally stopped.
After completion of cement grouting and testing for leakages, remove the sockets.
