Name of Work Na - e-Tendering

89 Dy. E. E.
ANNEXURE III
Item No. :- Providing cement based water proofing treatment to terrace (Indian water proofing or a like) with brick bats laid in required slope to drain
the water for any span after cleaning the base surface. Applying a coat of cement slurry admixed with approved water proofing compound and
laying the bricks bats on bottom layer in C.M. 1:5 admixed with approved water proofing compound, filling upto half depth of brick bats, curing
this layer for 3 days, applying cement slurry over this layer jointing of bricks bats with C.M. 1:3 admixed with approved water proofing
compound and finally top finishing with average 20 mm thick layers of same mortar added with jute fibre at 1 Kg. per bag including finishing
the surface smooth with cement slurry admixed with approved water proofing compound. Marking finished surface with false squares of
300mm x 300 mm marking the junctions at the parapet rounded and tapered towards top for required height, with drip mould at the junction of
plaster and parapet and curing and covering 10 years guarantee on court fee stamp paper of Rs. 100/- including bonding test etc. complete.
GENERAL :- The item pertains to the provision and laying waterproof layer on terrace and other floor including W/C and bath.
MATERIALS:- i) The water proofing compound shall confirm to relevant IS 2645-1964 with its latest edition, especially as regard to permability test.
ii) Brick Bat Coba -The bricks shall confirm to standard specification A-9. The brick bats shall be from 70 mm to 100 mm.
iii) Fine Aggregate - Shall confirm to standard specification A-6.
iv) Cement - Cement shall confirm to IS 269-1967 and all test shall be carried out as specified.
Item:- Preparing existing surface. All material on the existing surface slab/terrace/Raft shall be removed and surface shall be cleaned to receive the
treatment. All surfaces shall be cleaned.
INJECTION:-The new water proofing treatment shall be started by injecting cement slurry with water cement ratio as 40 to 45 with approved water proofing
compound at the rate of 2% by weight of cement. The holes of injection shall be fixed in such a staggered pattern that 11 inherent holes,
cavities voids, honey combing etc. shall be sealed properly and whole structure to be treated shall be consistent, homogeneous, and
resistant to water leakages, seepage, dampness and moisture etc. The drainage plan taking into consideration the existing water spouts
shall be prepared and got approved. The slab shall then be overlayed with brick bat coba to single course and in compact manner in
cement mortar 1:5 using manufacture specifications or as directed by Engineer In-charge. The necessary gradient for easy flow to drain
off water shall be maintained meticulously through the existing rain water drainage system. The treatment shall be continued along inner
side of the parapets of ever adjoining walls upto the height of 30 cm. (or as directed) and corners shall be rounded off properly. Finally
the top surface shall be covered with joint less water proofing plaster in cement mortar 1:3 of 12 to 18 mm average thickness, finished
smooth with travel in cement colour and marked into 30 cm. false square, if so directed. The average thickness of the complete treatment
shall not be less than 112 mm and shall be rendered hard and tough to with stand the weathering and normal domestic use. The
finished terrace shall be watered for a period of not less than ten days. All test for leakages shall be carried out without any extra cost.
The leakages if any shall be rectified forth with. The work shall not be accepted unless the rectifications work, if required, in carried out
satisfactorily and results of ponding test are satisfactory
Contractor No. of correction Executive Engineer