Providing water proofing treatment in the School of Medical Science in UoH campus

Amount

1) The estimated amount is exclusive of GST. 2) The Bidder should quote basic rates exclusive of GST and quote GST percentage separately. GST should be revised from time to time.

Retaining walls, return walls, walls (any thickness) including attached pilasters, buttresses, plinth and string courses fillets, kerbs and steps etc.

Providing and fixing double scaffolding system (cup lock type) on the exterior side, up to seven story height made with 40 mm dia M.S. tube 1.5 m centre to centre, horizontal & vertical tubes joining with cup & lock system with M.S. tubes, M.S. tube challies, M.S. clamps and M.S. staircase system in the scaffolding for working platform etc. and maintaining it in a serviceable condition for the required duration as approved and removing it thereafter. The scaffolding system shall be stiffened with bracings, runners, connection with the building etc wherever required for inspection of work at required locations with essential safety features for the workmen etc. complete as per directions and approval of Engineer-in-charge. The elevational area of the scaffolding shall be measured for payment purpose. The payment shall be made once irrespective of duration of scaffolding. Note: - This item to be used for maintenance work judicially, necessary deduction for scaffolding in the existing item to be done.

Chipping of unsound/weak concrete material from slabs, beams, columns etc. with manual Chisel and/ or by standard power driven percussion type or of approved make including tapering of all edges, making square shoulders of cavities including cleaning the exposed concrete surface and reinforcement with wire brushes etc. and disposal of debris for all lead and lifts all complete as per direction of Engineer-In-Charge. 75 mm average thickness

Corrosion Protection to Existing Reinforcement: Supply and apply of single component liquid rust remover that temporarily prevents further rusting of steel structures by providing a passivating coat. Consumption: 0.2 Kg./m2/coat with the following specifications. Density: 1.01 Kg./l at 300C. Make of product: Sika/Fosroc/Dr Fixit.

Supply and apply a 1-component, cementitious, polymer modified bonding primer Cu.m reinforcement corrosion protection coating containing corrosion inhibitors and recycled materials to reduce enviromental waste with the following specification. Mortar Density : 2.0 ± 0.05 Kg./L Consumption: 1.5–2.0 Kg. of powder per m2 per 1 mm layer thickness Compressive Strength: ~50 MPa after 28 days as per EN 12190; Tensile Strength: ~2.0 MPa after 28 days as per EN 1542; Corrosion Test : pass as per EN 15183. Corrosion Test : pass as per EN 15183. Make of product: Sika/Fosroc/Dr Fixit

Structural Crack Treatment: Supply and apply a shrinkage free low viscous, structural grade epoxy resin based injection grout with under mentioned specification. Mixed Density 1.1 kg/l (at +27°C) Viscosity ~ 250 mPas at +30°C Product should comply according to ASTM C 881, Type II and IV, Grade-1, Class E+F and should have below properties.Compressive strength >= 70 N/mm2 (7 days) according to ASTM C 579; Tensile Strength ~ 50 N/mm2 (after 7 days at +30°C cure) (According to ASTM D 638); Bond Strength ~ 10.8 N/mm2 (failure in concrete) after 14 days at +30°C cure; Flexural strength ~ 33 N/mm2 according to ISO 178. Make of product: Sika/Fosroc/Dr Fixit.

Supply and apply Sealing of exposed 'V' groove of 5mm deep and 5mm wide with solvent-free, moisture tolerant, thixotropic, two part structural adhesive and repair mortar, based on epoxy resins and special fillers, designed for use at temperatures between +10°C and +40°C. with the following product specification. Yield: 0.6 ltr/kg. Product requirements: Conforms to ASTM C 881-78, Type I, Grade 3, Class B+C; compressive strength > 60 N/mm2 (14 days) according to ASTM C 881; Tensile Strength in Flexure ≥ 25 N/mm2 (14 days) Tensile Strength ~ 7 N/mm2 (7 Days) Bond strength > 10 N/mm2 (7 days) according to ASTM C 882 Make of product: Sika/Fosroc/Dr Fixit.

Supply & Apply an epoxy resin based, 2-part, thixotropic, high performance anchoring adhesive for anchoring threaded rods and reinforcing bars in both cracked and un-cracked concrete dry or damp concrete whereever required in RCC members including power drilling, cleaning of holes, then rebars should be inserted in holes that should be filled with epoxy to ensure the bond as per manufacture recommendation complete as per site requirement and directions of Engineer-incharge. Product characteristics should have Long open Time, Can be used in damp concrete, High load capacity, ETA for anchoring in cracked concrete, ETA for post installed rebar connections, Seismic tested (C1 & C2), Suitable for contact with drinking water, Fire resistant and Styrene-free with the following product specification. Compressive Strength ~95 N/mm2 (7 days, +20 °C) as per ASTM D 695, Tensile Strength in Flexure ~45 N/mm2 (7 days, +20 °C) as per ASTM D 790, Tensile Strength ~23 N/mm2 (7 days, +20 °C) as per ASTM D 638, Modulus of Elasticity in Tension ~5500 N/mm2 (7 days, +20 °C) as per ASTM D 638. Make of product: Sika/Fosroc/Dr Fixit.16 mm x 160 mm

20 mm x 200 mm

For Patch Works on the Slab: With Polymer Modified Mortar: Supply and apply a pre-batched one component polymer modified cementitious, dual shrinkage compensated, patch repair mortar with the following product specification. System requirements: compressive strength >= 45 N/mm2 (28 days) according to ASTM C 109 The product shall be built 50 mm layer thickness at once. Make of product: Sika/Fosroc/Dr Fixit.

Supply and apply a polymer modified site batched patch repair mortar. Ratio SBR based multipurposal polymer. Water:Cement:Sand = 1:4:8:32 with the following product specification. Modified cementitious mortar Yield: 0.02 ltr/Kg. of mortar (considering 10% polymer by weight of cement) Product requirements: styrene butadiene rubber emulsion; Polymer content > 35%. Tensile Adhesion Strength > 1.5 Make of product: Sika/Fosroc/Dr Fixit.

Wall dampness: Anti-Carbonation Coating Supply and apply one part, plasto-elastic coating based on UV-curing acrylic dispersion with excellent crack-bridging properties, protective coating system to achieve DFT (Dry Film Thickness) of 150 microns in two coats after application of one coat of Silane Siloxane modified Primer on concrete surface including Surface preparation by high pressure water jet or manually as per direction of Engineer-In-Charge in recommended RAL Shades. Primer: Elastic Primer in 2 coats (Solvent based polymer binder) Consumption: 0.2 kg/m2. Coating: In 2 coats. Consumption: 0.2 kg/m2/coat Technical requirements for coating Specific gravity of 1.4 kg/l, Solid content > 70%, Adhesion with concrete > 1.5 N/mm², Equivalent air layer thickness, SDCO₂ shall be >50m, Equivalent air layer thickness, SDH₂O < 4m, Elongation at break > 200%, Crack Bridiging Capacity > 2.0 mm.

Supply and apply a ready to use, factory designed pourable, shrinkage compensated, free flowing and self-compacting superior performance micro concrete with the following product specification. Product requirements: compressive strength > 65 N/mm2 (28 days) according to ASTM C 109. Flexural Strength : 9 Mpa in 28 days (ASTM C 293) Splitting tensile strength : >3.5 Mpa (28 Days) as per ASTM C496. Make of product: Sika/Fosroc/Dr Fixit.

Terrace & Chajjas Water Proofing System: Core Cut Treatment: Providing & applying shrinkage compensated cement based flowable, expanding grout in pipe penetration & keep 20mm minimum gap from front side. The grout should comply to ASTM C 1107 and should have following physical properties: Compressive Strength at ambient temperature of +30°C according to ASTM C 109 in 1 day ~25 N/mm2, in 3 days ~35 N/mm2, in 7 days ~45 N/mm2 and in 28 days ~65 N/mm2; Flexural Strength at ambient temperature of +30°C according to ASTM C 293 in 7 days ~7 N/mm2 and in 28 days ~9 N/mm2; E-Modulus ~37,000 N/mm2. Fill the gap with solvent free, moisture insensitive epoxy resin based patch repair putty on pipe penetration surfaces. The putty shall be applied to a thickness of minimum 20mm on pipe penetration joint to concrete Yield: 0.6 ltr/kg. Product requirements: suitable for submerged condition; compressive strength of 40 N/mm2 (1 day) according to IS 9162-1979. Make of product: High strength non-shrink pourable cementitious precision grout product in Sika/Fosroc/Dr Fixit. Coving - Providing and making coving using 1:3 CM with dual shrinkage compensated mortar. Sealing of of cracks and construction joints: making grroove & filling with PU sealant followed by application of PU waterproofing followed by of fleece reinforcement over crack. Surface Preparation Cleaning the internal surface thoroghly shall be free of loose concrete, sharp protrusions this shall be assured using mechanical grinding of substrate Waterproofing Layer: On the prepared surface providing and applying epoxy primer at 250-300g based on surface porosity followed by application of providing and applying >65% solids, two component PU waterproofing @ 1.5mm DFT. Waterproofing shall have following performance property a) Tensile: 1.5 Mpa b) Elongation: >300% as per ASTM D 412 c) Shore A hardness > 50 d) Tear Strength : >20 N/mm e) SRI Index: 106 Terminations of waterproofing:- Waterproofing membrane shall be terminated on verticals at 300mm above finished floor level . Use GSM 150 as embedded membrane to the waterproofing system.

VAARAAHEE STRUCTURAL REPAIRS (BID ID -3127486)