A.R.M. Of Ohts (Over Head Tanks) At Ss Bn Itbp For The Year 2023-24 , Chipping Of Unsound / Weak Concrete Material From The Chajjas, Lintels, Sunshades , Balconies, Parapets, Slabs And Other Similar Rcc Works With Standred Power Driven Precussion Type Of Pneumatic Chiesel Of Standred Make As Directed By Engineer- In- Charges Including Tapering All Edges, Making Squre Shoulders Of Cavities And Cleaning The Concrete Steel Reinforcement From Rust Complete By Using Emery Paper , Spatula , Wire Bursh Etc. Disposal Of All Malba For All Leads & Lift Complete As Per Direction Of Engineer-In-Charges. 50Mm Average Thickness , Cleaning Of Reinforcement From Rust From The Reinforcing Bars To Give It A Total Rust Free Steel Surface By Using Alkaline Chemical Rust Remover Of Approved Make With Paint Brush And Removing Loose Particles After 24 Hours Of Its Application With Wire Brush And Thoroughly Washing With Water And Allowing It To Dry, All Complete As Per Direction Of Engineer-In-Charge.Bars Above 12 Mm Diameter , Providing And Laying Sbr Polymer Modified (Of Approved Make @ Minimum 2% By Wt. Of Cement Used) Plain/Reinforced Concrete Jacket For The Structural Members E.G. Columns, Pillars, Piers, Beams Etc With Concrete Having The Specified Minimum Characteristic Compressive Strength [With Ordinary Portland Cement, Coarse Sand And Graded Stone Aggregate Of 10Mm Maximum Size In Proportion As Per Design Criteria] With Specified Average Thickness All-Round Existing Core Of Rcc Member. 75Mm Thick In Grade M 25 With Cement Content Not Less Than 330 Kg Per Cum , Centering And Shuttering Including Strutting, Propping Etc. And Removal Of Form For :Edges Of Slabs And Breaks In Floors And Walls Above 20 Cm Wide , Shotcreting R.C.C. Columns, Beams And Slabs Etc. In Layers With Approved Design Mix Concrete Having The Specified Minimum Characteristic Compressive Strength [With Ordinary Portland Cement, Coarse Sand And Graded Stone Aggregate Of 10 Mm Maximum Size In Proportion As Per Design Criteria] Including The Cost Of Centering And Shuttering At Edges And Corners Etc. As Directed By Engineerin- Charge 50Mm Thick In Grade M 25 With Cement Content Not Less Than 330 Kg Per Cum , Providing And Fixing Hard Drawn Steel Wire Fabric Of Size 75 X25 Mm Mesh Or Other Suitable Size Wire Mesh To Be Fixed & Firmly Anchored To The Concrete Surface By Means Of L Shaped Mild Steel Shear Key Welded With Existing Reinforcement Including The Cost Of Materials, Labour, Tool & Plants As Approved By Engineer-In-Charge. , Steel Reinforcement For R.C.C. Work Including Straightening, Cutting, Bending, Placing In Position And Binding All Complete Above Plinth Level. Thermo Mechanically Treated Bars Of Grade Fe-500D Or More. , 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 There After .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 Engineerin-Charge .The Elevational Area Of The Scaffolding Shall Be Measured For Payment Purpose.The Payment Will Be Made Once Irrespective Of Duration Of Scaffolding , Applying Priming Coats With Primer Of Approved Brand And Manufacture, Having Low Voc (Volatile Organic Compound ) Content. With Water Thinnable Cement Primer On Wall Surface Having Voc Content Less Than 50 Grams/Litre , Finishing Walls With Premium Acrylic Smooth Exterior Paint With Silicone Additives Of Required Shade: Old Work (Two Or More Coat Applied @ 1.67 Ltr/ 10 Sum) On Existing Cement Paint Surface). , Cleaning Of Under Ground Sump, Over Head R.C.C. Tank ( Independent Staging) Including Disposal Of Slit And Rubbish, All As Per Direction Of Engineer-In-Charge. The Cleaning Shall Consist Following Operations:- (I) Tank Shall Be Emptied Of Water By Pumping & Bottom Shall Be Cleaned Of Silt And Other Deposits. (Ii) Entire Surface Area Of The Sump Shall Then Scrubbed Thoroughly With Wire Brush Etc. And Pressure Washed With Water. (Iii) Chlorination Of Rcc Internal Surface By Liquid Chlorine. (Iv) The Treated Surface Shall Be Dried Using Air Jetting And All Loose Particles Shall Be Removal From The Surface. , Providing And Applying Integral Crystalline Slurry Of Hydrophilic In Nature For Waterproofing Treatment To The Rcc Structures Like Retaining Walls Of The Basement, Water Tanks, Roof Slabs, Podiums, Reservior, Sewage & Water Treatment Plant, Tunnels / Subway And Bridge Deck Etc., Prepared By Mixing In The Ratio Of 5 : 2 (5 Parts Integral Crystalline Slurry : 2 Parts Water) For Vertical Surfaces And 3 : 1 (3 Parts Integral Crystalline Slurry : 1 Part Water) For Horizontal Surfaces And Applying The Same From Negative (Internal) Side With The Help Of Synthetic Fiber Brush. The Material Shall Meet The Requirements As Specified In Aci- 212-3R-2010 I.E By Reducing Permeability Of Concrete By More Than 90% Compared With Control Concrete As Per Din 1048 And Resistant To 16 Bar Hydrostatic Pressure On Negative Side. The Crystalline Slurry Shall Be Capable Of Self-Healing Of Cracks Up To A Width Of 0.50Mm. The Work Shall Be Carried Out All Complete As Per Specification And The Direction Of The Engineer-In-Charge. The Product Performance Shall Carry Guarantee For 10 Years Against Any Leakage. 22.23.1 For Vertical Surface Two Coats @ 0.70 Kg Per Sqm , Providing And Applying Integral Crystalline Slurry Of Hydrophilic In Nature For Waterproofing Treatment To The Rcc Structures Like Retaining Walls Of The Basement, Water Tanks, Roof Slabs, Podiums, Reservior, Sewage & Water Treatment Plant, Tunnels / Subway And Bridge Deck Etc., Prepared By Mixing In The Ratio Of 5 : 2 (5 Parts Integral Crystalline Slurry : 2 Parts Water) For Vertical Surfaces And 3 : 1 (3 Parts Integral Crystalline Slurry : 1 Part Water) For Horizontal Surfaces And Applying The Same From Negative (Internal) Side With The Help Of Synthetic Fiber Brush. The Material Shall Meet The Requirements As Specified In Aci- 212-3R-2010 I.E By Reducing Permeability Of Concrete By More Than 90% Compared With Control Concrete As Per Din 1048 And Resistant To 16 Bar Hydrostatic Pressure On Negative Side. The Crystalline Slurry Shall Be Capable Of Self-Healing Of Cracks Up To A Width Of 0.50Mm. The Work Shall Be Carried Out All Complete As Per Specification And The Direction Of The Engineer-In-Charge. The Product Performance Shall Carry Guarantee For 10 Years Against Any Leakage. For Horizontal Surface One Coat @1.10 Kg Per Sqm.
