Strengthening And Rehabilitation Of Rcc Bridge Over River Juri On Dharmanagar-Bagbassa Road Near Old Motor Stand At Dharmanagar, North Tripura Bridge Construction Items-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 2 50 Mm Average Thickness 3 75 Mm Average Thickness 4 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. 5 Providing, Mixing And Applying Bonding Coat Of Approved Adhesive On Chippedportion Of Rcc As Per Specifications And Direction Of Engineer-Incharge Complete In All Respect.Epoxy Bonding Adhesive Having Coverage 2.20 Sqm / Kg Of Approved Make. 6 Providing & Laying Design M-40 Grade Concrete ( Note : Min Cement Content Considered In M-40 Is @ 390 Kg / Cum ) 7 Centering And Shuttering Including Strutting, Propping Etc. And Removal Of Form For All Heights For Rcc Deck Slab, Crash Barrier, Longitudinal Girders And Cross Girders 8 Providing And Fixing Shuttering In Girders Forreconstruction Of Span 2 9 For Pier / Abutment Lumpsum Quantity Taken For Localisedwork 10 Thermo-Mechanically Treated Bars Of Grade Fe-500D Steel Reinforcement For R.C.C. Work Including Straightening, Cutting, Bending, Placing In Position And Binding All Complete Above Plinth Level. 11 Providing And Laying Of A Strip Seal Expansion Joint Catering To Maximum Horizontal Movement Upto 40 Mm, Complete As Per Approved Drawings And Standard Specifications To Be Installed By The Manufacturer / Supplier Or Their Authorised Representative Ensuring Compliance To The ManufacturerS Instructions For Installation Complete Work. 12 Dismantling The Existing Strip Seal Expansion Joint I / C Structrual Steel Edge Beam Anchor Plate Etc. Of The Existing Damaged Expansion Joint By Cutting With Gas Cutter And Breaking Of Concrete By Machanical Means I / C Disposal Of Rubbish & Malba Etc. Complete As Per The Direction Of Theengineer-In-Charge. 13 Providing And Applying 2.5 Mm Thick Road Marking Strips ( Retro- Reflective ) Of Specified Shade / Colour Using Hot Thermoplastic Material By Fully / Semi Automatic Thermoplastic Paint Applicator Machine Fitted With Profile Shoe, Glass Beads Dispenser, Propane Tank Heater And Profile Shoe Heater, Driven By Experienced Operator On Road Surface Including Cost Of Material, Labour, T&P, Cleaning The Road Surface Of All Dirt, Seals, Oil, Grease And Foreign Material Etc. Complete As Per Direction Of Engineer-Incharge And Accordance With Applicable Specifications. 14 Providing And Laying Bituminous Concrete Using Crushed Stone Aggregates Of Specified Grading, Premixed With Bituminous Binder And Filler, Transporting The Hot Mix To Work Site By Tippers, Laying With Paver Finisher Equiped With Electronic Sensor To The Required Grade, Level And Alignment And Rolling With Smooth Wheeled, Vibratory And Tandem Rollers To Achieve The Desired Compaction And Density As Per Specification, Complete And As Per Directions Of Engineer-In-Charge.40 / 50 Mm Compacted Thickness With Bitumen Of Grade Vg-30 @ 5.5% ( Percentage By Weight Of Total Mix ) And Lime Filler @ 3% ( Percentage By Weight Of Aggregate ) Prepared In Batch Type Hot Mix Plant Of 100-120 Tph Capacity. 15 Providing And Laying 70Mm Thick Weaing Course In Span-2 Over Deck Slab With Design M-40 Grade Concrete ( Note : Min Cement Content Considered In M-40 Is @ 390 Kg / Cum ) 16 Providing And Fixing Drainge Spouts Complete As Per Irc:Sp-42 With 150 Mm Dia Pvc Pipe And Downtake Length 1M As Per Engineer-In-Charge. 17 Providing And Fixing Glow Studs Of Size 100X20 Mm Made Of Heavy Duty Body Shall Be Moulded Asa ( Acrylic Styrene Acryloretrite ) Or Hip ( High Impact Polystyrene ) Or Abs Having Electronically Welded Micro- Prismatic Lens With Abrasion Resistant Coating As Approved By Engineer In Charge. The Glow Stud Shall Support A Load Of 13635 Kg Tested In Accordance With Astm D4280. The Slope Of Retro- Reflective Surface Shall Be 35 ( + / -5 ) Degress To Base .The Reflective Panels On Both Sides With At Least 12 Cm Of Reflective Area Up Each Side. The Luminance Intensity Should Be As Per The Specification And Shall Be Tested As Described In Astm I: 809 As Recommended In Bs: 873 Part 4 : 1973. The Studs Shall Be Fixed To The Road Surface Using The Adhesive Conforming To Is, As Per Procedure Recommended By The Manufacturer Complete And As Per Direction Of Engineer-In-Charge. 18 Providing And Applying Of Anticorrosive Treatment To Exposed Structural Reinforcement By Two Coats Of Ipnet Rb Or Equivalent With Time Interval Of Minimum 8 -10 Hours Between Each Coat After The Application Of Two Coats Of Alkaline Rust Converting Primer. The Application Shall Be Done By Brush Or Spray After Cleaning Existing Reinforcement With Wire / Rotary Wire Brush To Make The Surfaces Free From Loose Material, Dirt, Traces Of Corrosion Etc. And Throughly Washing With Water And Allowing It To Dry Inclusive Of All Labour, Materials, Equipment Etc. Complete In All Respect As Per Specifications And Instructions Of Engineer In Charge. 19 Providing And Painting Of Anticorrosive Paint On Exposed Surface Of Superstructures And Complete As Per Specifications And ManufactureS Recommendation By Approved Supplier As Per The Direction Of Engineer-In-Charge. 20 Providing & Applying Polymer Mortar Over Leached, Damaged And Spalled Concrete Surface And Exposed Steel Reinforcement Complete As Per Drawing / Engineer In Charge. ( For Area Of Avg Thickness 50Mm ) 21 Providing & Applying Polymer Concrete Over Leached, Damged And Spalled Concrete Surface And Exposed Steel Reinforcement Complete As Per Drawing / Engineer In Charge. ( For Area Of Avg Thickness 75Mm ) 22 Cleaning Of All Pier / Abutment Cap 23 Cleaning And Removing Vegetation As And Where Required 24 Providing And Fixing In Position And Level Elastomeric Bearings Of Size 500 Mm X 360 X 100 Mm Thick Confirming To Irc:83 ( Part-Ii ) Complete With All Respect And As Per Drawing / As Directed By Engineer-In-Charge. 25 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-Incharge, Beyond 50 M Initial Lead, For All Leads Including All Lifts Involved. 26 Drilling Suitable Holes Of 10 Mm Dia And 40Mm Depth In Concrete Structure For Filling The Cracks. 27 Providing And Inserting Nipples For Crack Filling With 8Mm Dia And 40 Mm Depth @ 300Mm C / C With Approved Fixing Compound After Holes For Grouting As Per Technical Specifications Including Subsequent Cutting / Removal And Sealing Of The Hole As Necessary Of Nipples After Completion Of Pressure Epoxy Grouting. ( Total Crack Length 190 Rmt ) 28 Drilling Suitable Holes Of 10 Mm Dia And 40 Mm Depth In Concrete Structure For Filling The Cracks. 29 Providing And Inserting Nipples For Filling Honeycombing With 16Mm Dia And 150 Mm Depth @ 500Mm C / C With Approved Fixing Compound After Holes For Grouting As Per Technical Specifications Including Susequent Cutting / Removal And Sealing Of The Hole As Necessary Of Nipples After Completion Of Pressure Epoxy Grouting. 30 Filling The Honeycombing / Cracks With Pressure Epoxy Grout By Injection Through Nipple Complete Work. 31 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 Engineer- In-Charge Note: Rates Shall Include The Providing Necessary Ground Wires Etc. The Levelling Gauges, If Used, Shall Be Paid For Separately. Payment Under This Item Shall Be Made Only After Proper Wet Curing Has Been Done And Surface Has Beensatisfactorily Evaluated By Sounding / Tapping With A Blunt Metal Instrument.75Mm Thick In Grade M 25 With Cement Content Not Less Than 330 Kg Per Cum 32 Providing And Fixing Retro Reflecting Sign Bords. 33 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. 34 Painting On Crash Barrier Complete Work As Per Engineer-In-Charge. 35 Dismantling Steel Work In Built Up Sections In Angles, Tees, Flats And Channels Including All Gusset Plates, Bolts, Nuts, Cutting Rivets, Welding Etc. In Span-2 At Road Level Including Dismembering And Stacking Within 50 Metres Lead. 36 Dismentling, Removing And Stacking Of Reinforcement Of Existing Deck Slab And Girders Including Cross Diaphragm Of Span-2 And Lead Within 50 Meters Including Cutting The Bar Complete Work. 37 Providing & Applying Pre- Stressed Carbon Fiber Laminates ( 1.2 Mm Thick And 100 Mm Wide ) With Compatible Structural Adhesive Including.Grinding Concrete Substrate, Cleaning It With Wire Brush Removing Oil, Laitance If Present, Etc. Complete. Applying Compatible Primer On Prepared Substrate, Filling The Holes And Uneven Surface With Thixo-Tropic Putty Etc.Complete. Marking The Application Area On Structural Element, Cutting The Plate To Require Size, Applying Compatible Structural Adhesive On Plate In Parabolic Manner By Adhesive Laminating Machine, Paste The Laminate On Desire Area By Using Tamping Roller To Avoid Any Air Voids Etc. Complete. Applying Second Coat Of Saturant After Min. 12Hrs, Rectify Air Voids If Any Paste The River Sand On It To Make Surface Rough To Take Any Further Finishes. 38 Providing And Fixing In Position Anchor Plates Made Up Of High Grade Aluminium For Prestressed And Non-Pre-Stressed Including Drilling Holes In Concrete Surface And Fixing Mechanical Anchor Bolts Or Equivalent To Fix Carbon Plates. 39 Strengthening Structural Elements With Nonmetallic Composite Fiber Wrapping System Comprise Of Uni-Directional Glass Fiber Sheet And Compatible Saturant. Grinding / Moulding Concrete Substrate, Cleaning It With Wire Brush Removing Oil, Laitance If Present, Rounding Sharp Edges To Min 25 Mm Radius Etc. Complete. Applying Compatible Primer On Prepared Substrate, Filling The Holes And Uneven Surface With Thixo-Tropic Putty Etc. Complete. Wrapping The Fiber Sheet To Structural Element At Desired Orientation Using Tamping Roller To Avoid Any Air Voids Etc. Repeat The Same Procedure For Multiple Layer With The Interval Of 8Hrs.Applying Second Coat Of Saturant After Min. 12Hrs, Rectify Air Voids If Any Paste The River Sand On It To Make Surface Rough To Take Any Further Finishes Sand Pasting: Applying Second Coat Of Saturant After Min. 12 Hrs, Rectify Air Voids If Any Paste The River Sand On It To Make Surface Rough To Take Any Further Finishes ( Mode Of Measurement: Per Sq.Mt Of Glass Fiber Sheet Consumed And Not Surface Area Of Application ) 40 Providing And Fixing Carbon Fiber Anchor Including Drilling Hole In The Base Concrete, Fixing The Anchor Using Epoxy 50X55 System Spreading Fibers In Star Pattern Including Application Of Saturant, Etc Complete
