WATERPROOFING WORKS OF INSTITUTES BUILDING TERRACES ROADS AT VARIOUS LOCATION IN TIFR MUMBAI

PART A: Dismantling tile work in floors and roofs laid in cement mortar including stacking material within 50 metres lead.For thickness of tiles 10 mm to 25 mm

Demolishing brick work manually/ by mechanical means includingstacking of serviceable material and disposal of unserviceable material within 50 metres lead as per direction of Engineer-in-charge.In cement mortar

Demolishing R.C.C. work manually/ by mechanical means including stacking of steel bars and disposal of unserviceable material within 50 metres lead as per direction of Engineer - in- charge.

Kota stone slab flooring over 20 mm (average) thick base laid over and jointed with grey cement slurry mixed with pigment to match the shade of the slab, including rubbing and polishing complete with base of cement mortar 1 : 4 (1 cement : 4 coarse sand) :25 mm thick

A. Crack opening & filling :- Providing & applying for identify, cleaning all the joints of center opening, wet joints, marking the same. Making "V" groove at the interface of joints. Filling the "V" joints with polymer modified mortar/Cebex 100 or Nitomortar 30 M/s Fosroc chemical Pvt. Ltd or equivalent.

A. Nozzle fixing:- Providing & applying for fixing Nozzles of 12mm dia by drilling holes & fixing using rendrog Plug M/s Fosroc chemical PVT. Ltd. Or equivalent B. Epoxy Grouting:- Providing & applying epoxy resin grout Concresive 1315 BASF/Cebex 100(Fosroc) or equivlent through the nozzle fixed already under pressure of 3-3.5 kg/cm 2.Above including all labour, material etc complete.

Structural Repairs :- Providing structural repairs in Old Damaged concrete structures/surfaces with approved Polymer with following operations 1)Removal of loose/Spalled or damaged concrete by chipping and cleaning the concrete surface and reinforcement steel with wire brush and with water jet. 2) Cleaning the re-bars with rust remover for complete rust removal and washing with water jet to make the surface free from Acid content. 3) Applying Protective coat /bond coat using Polymer and Cement in the proportion of1:1.5(1 part polymer and 1.5 parts of cement in synthetic enamel paint like consistency with brush. 4) Reinstate the area with polymer modified mortar in layers of maximum 20mm with the proportion of Cement 50kg : Washed and dried river sand 87.50; Silica sand 37.50 kg. mixed with 10 liters of polymer (or 1kg cement :1.75kg washed and dried river sand ; 0.75kg Silica sand : 200ml polymer) 5) If thickness of repair exceed 20mm,after every 20mm thick bond coat as per 2 above to be applied continuing further structural repair works.This work is inclusive of all material,labour etc complete as directed with approved chemical manufacturer and specified by the manufacturer for Structural repair shall be used.

Providing and laying integral cement based water proofing treatment including preparation of surface as required for treatment of roofs, balconies, terraces etc consisting of following operations: (a) Applying a slurry coat of neat cement using 2.75 kg/sqm of cement admixed with water proofing compound conforming to IS. 2645 and approved by Engineer-in-charge over the RCCslab including adjoining walls upto 300 mm height including cleaning the surface before treatment. (b) Laying brick bats with mortar using broken bricks/brick bats 25 mm to 115 mm size with 50% of cement mortar 1:5 (1 cement : 5 coarse sand) admixed with water proofing compound conforming to IS : 2645 and approved by Engineer-in-charge over 20 mm thick layer of cement mortar of mix 1:5 (1 cement :5 coarse sand ) admixed with water proofing compound conforming to IS : 2645 and approved by Engineer-in-charge to required slope and treating similarly the adjoining walls upto 300 mm height including rounding of junctions of walls and slabs. (c) After two days of proper curing applying a second coat of cement slurry using 2.75 kg/ sqm of cement admixed with water proofing compound conforming to IS : 2645 and approved by Engineer in-charge. (d) Finishing the surface with 20 mm thick jointless cement mortar of mix 1:4 (1 cement :4 coarse sand) admixed with water proofing compound conforming to IS : 2645 and approved by Engineer in-charge including laying glass fibre cloth of approved quality in top layer of plaster and finally finishing the surface with trowel with neat cement slurry and making pattern of 300x300 mm square 3 mm deep. (e) The whole terrace so finished shall be flooded with water for a minimum period of two weeks for curing and for final test.“All above operations to be done in order and as directed and specified by the Engineer-in-Charge :With average thickness of 120 mm and minimum thickness at khurra as 65 mm.

Providing and supplying 12 mm cement plaster of mix : 1:4 (1 cement: 4 fine sand) as directed by Engineer-In-Charge.

providing and supplying and sealing the tile joints with gun grade polysulphide sealent suitable for external tile joints and cleaning the surface neatly and applying approved primer to the surfaceof approved make and as per the manufacturer's specification and filling gun grade sealent into the joints, lines and levels complete all as per manufacturer's specifications and as directed by engineer in charge.

Providing and laying in position bitumen hot sealing compound for expansion joints etc. Using grade ‘A’ sealing compound.

Disposal of building rubbish / malba / similar unserviceable, dismantled or waste materials by mechanical means, including loading, transporting, unloading to approved municipal dumping ground or as approved by Engineer-in-charge, beyond 50 m initial lead, for all leads including all lifts involved.

Providing and applying two coats of polymeric cementitious coating over the concrete or plastered surface with the using polymer and cement in ratio specified with using approved manufacturers specification. Air cures the same for 24hrs. Apply potable water on surface to dampen the area before application of polymeric second coat.

Providing and applying Elastomeric (Polymer) transparent coating at various walls/terrace etc. including cleaning of surface thoroughly with potable water and removing all loose foreign material, filling surface cracks specifies with using approved manufacturer's specification and guidelines to make the surface completely waterproof. Complete job including material all tools and tackels, manpower etc. for two or more coats as per the direction of Engineer Incharge.

PART 'B" Any unforeseen item not covered above, executed from CPWD Delhi Schedule of Rates 2018 upto a base value of Rs. 1,32,500/- Hint: Bidder is supposed to quote rate for this item in column (green) at value which is at a certain percentage above or below the rate of DSR 2018. For e.g. if the estimated rate is Rs. 1,32,500/- then bidder should quote rate of Rs. 1,45,750/- in case he intends item in this part to be paid at the rate of 10% above DSR 2018 or Rs. 1,19,250/- in case he intends item in this part to be paid 10% below the DSR 2018 The value given in the rate for this item shall be used to derive the rate to be paid for the item from DSR 2018

Rajesh Infrastructure Pvt Ltd