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| 1 | Examining concrete by tapping with light hammer and marking of the loose concrete areas of structural elements in straight line geometrical forms, grooving the edges same with grinder upto 5-10mm depth without damaging existing rebars, carefully removing unsound weak/loose concrete/cover & concrete around the rebars upto 10 mm depth by low impact high frequency hammer/chipper without damaging the sound concrete, daily cleaning and stacking of debris at prescribed location in polypropylene/ paper bags, disposing off the debris outside the premises, complete all as directed. |
| 2 | Providing & applying a two components ready to use polymer modified cementatious coating certified for portable water in three coats with glass fiber mesh of =>45 GSM inside of the wall & floor of the tank.The thickness of coating shall not be less than 1.5mm complete all as manufacturers instruction and as directed. |
| 3 | M&L applying three coats water based epoxy coating certified for portable water on all over the concrete surface from inside, the coating shall be applied using roller brush application complete all as manufacturers instruction and as directed. |
| 4 | M&L making V groove of 10mm wide and 30mm deep or upto the extend of joint/crack present at site over joint/ crack line using electricity operated angle grinder with diamond concrete saw blade and cleaning it by air blower complete all as manufacturers instruction and as directed. Note:-The groove shall be cut on the concrete surface along the joint/crack over RCC structure to be repaired. |
| 5 | M&L Sealing of exposed 'V' groove of 10mm wide and 30mm deep solvent-free,moisture tolerant,thixotropic, two part structural adhesive and epoxy repair mortar cum surface levelling mortar complete all as manufacturers instruction and as directed. |
| 6 | M&L Drilling Holes of 12mm dia up to 100 mm deep holes in structural members at the interval of 300 mm in staggered manner or along the joint & crack line in Reinforced Concrete (RC) structural element including cleaning of the holes by air blower and inserting 12mm dia NRV (Non Returnable Valve) nozzle compatible with epoxy injector and having machined external end to receive outlet of Grouting Gun. Fix inside the hole by applying thixotropic epoxy adhesive to ensure complete sealing and allow curing the system for minimum of 8 Hrs before Grouting including nozzle projections, excess putty, if any, over concrete element by grinding, leveling and finishing the external surface, after completion of the work, etc. complete all as manufacturers instruction and as directed. |
| 7 | M&L Grouting injecting two part, low viscosity, moisture insensitive injection-liquid at damp substrate location, based on high strength epoxy resin by pressure and using pressure epoxy injector with accessories till nozzle refused to accept the grout including mixing of grout having Mixed Density 1.1 kg/l (at +27°C); Viscosity ~ 500 mPas at +30°C and should comply according to ASTM C 882 and should have below properties. Compressive strength >= 50 N/mm2 (7 days) according to ASTM C 579; Tensile Strength ~ 30 N/mm2 (after 14 days at +30°C cure) (According to ISO 527); Tensile Adhesion Strength >8 N/mm2 (failure in concrete) after 14 days at +30°C cure. Seal the nozzle with thixotropic epoxy putty after the refusal of grout material from the nozzle complete all as manufacturers instruction and as directed. Note: Leakage through other nozzle or cracks are required to be monitored while grouting and such points to be sealed as and when required without any extra cost. |
| 8 | M&L Prepration of existing surfaces like chipping of unsound weak/loose concrete/cover of reinforcement and removal of debries to a designated location (upto full height) block to support the structure proisionally during repair work and maintaining them in positioin till required, complete all as manufacturers instruction and as directed. |
| 9 | M&L cleaning existing reinforcement with wire brush/rotary wire brush to make surface free from rust scales, loose material, dirt etc complete and applying two coats of alkaline rust converting primer rust remover with brush on the existing rebar for complete wetting of rusted metal surface and allowed to react it for 16-24 hours. After 24 hours, a white layer will appear which will protect further corrosion of metal / steel for about 5-7 days including surface preparation. Before applying protective coating, the surface should be wire brushed and thoroughly cleaned for dust with dry cloth, complete all as manufacturers instruction and as directed. |
| 10 | Providing and Application of as passivator/Anti corrossion coating to the steel reinforcement shall be applied. The material shall be two component,cement based polymer modified two component coating for corrosion protection.The material shall be prepacked and ready to use. It shall be fully compatible with the reinstatement methods adopted complete all as specified and as directed by Engr-in-charge.This shall include surface preparation and errection of steel porps as required for the application complete all as manufacturers instruction and as directed. |
| 11 | Appplying & supply of two component solvent free epoxy bonding agent for bonding old to new concrete. The ready to use epoxy bonding agent shall be applied over old concrete using brush after cleaning of surface of all dust or latiance.The material is supplied as a two part material in preweighed quantities for ready onsite mixing and use. The material shall exhibits the following properties Compressive strength 50 N/mm2 at 7D Flexural strenght 35N/mms at 7 D, Shear strength 10N/mm2 at 7D and Tensile strength 20 N/mm2 and Bond Strength of 10N/mm2.The new concrete shall be placed within the open time as specified by the manufacturer to ensure maximum bonding and application shall be as per the manufacturer instruction ,complete all as specified and as directed |
| 12 | M&L Rebuilding the section of damaged RCC elements to its original size in thickness of upto 40mm by hand or spray application by Providing and applying make single component, fibre reinforced, sulphate resistant, low shrinkage, high performance cementitious structural repair mortar complete all as manufacturers instruction and as directed. |
| 13 | Rebuilding the section of damaged RCC elements to its original size or as per consultants recommendation in thickness of 40-100mm by providing and casting with ready to use non shrink, cementitious free flow micro-concrete or equivalent having compressive strength > 60 N/mm2 (28 days) according to ASTM C 1107-99 including providing and fixing of watertight foam faced finish shuttering of minimum 18mm thickness and supporting formwork, all lead lift, mixing, placing, de-shuttering, levelling the surface by grinding off cementitious slurry or cementitious joints differences if any complete all as manufacturers instruction and as directed. |
| 14 | Anti-Carbonation Protective Coating for Exterior Providing, and applying single component, high build, elastomeric, crack-bridging, resistant to CO2 & SO2 and Chloride ion diffusion, UV resistant, breathable acrylic coating, with elongation at break exceeding 200% applied in two coats (each coat 100 micron DFT) on acrylic based primer at an average total thickness of 200 microns DFT in two coats including acrylic resin based primer as per the recommendation of the manufacturers. Item rate inclusive of all materials, labours, supervision, tools, tackles, transportation, scaffolding/ temporary supports/working platform etc., complete all as manufacturers instruction and as directed. |
| 15 | Provision of Additional Rebar :Providing and fixing additional corrosion resistant hot dip galvanised steel rebar Fe415 or heigh grade as per required diameter in various structrural elements such as columns, beams, and slabs etc. to replace the lost rebar section due to corrosion including cutting, bending and fixing the bar by installing new rebar with Epoxy Acrylate based anchoring adhesive Drilling & Rebaring of 16mm dia x 160mm deep TMT bar complete all as manufacturers instruction and as directed. |
| 16 | M&L TMT Bars 10mm dia and overcut to length, bent to shape required including cranking, bending spirally for hooping for Columns hooking ends and binding with and including mild steel wire (annealed) not less than 0.90mm dia, complete all as specified and as directed. |
| 17 | M&L cleaning of under over head tanks internally from base to top including scraping the mud, silt from the base and walls, washing the complete internal surfaces with clean water removing the silt/mud outside the surrounding area and desilting / removal of mud from the connecting pipes cleaning the mouths of the internal pipes and depositing the same n. exc 100m away from site of any capacity and height upto 30 metre complete all as manufacturers instruction and as directed. |
| 18 | Surface Preparation & brick joint repairing:Cracks openings should be chiselled out to approximately 50mm X 25mm and should always be undercut to avoid formation of a ‘V’ shape and cut back to a minimum depth of 25 mm and given a good mechanical key to apply further crack filling material over and including zinc coating GI chicken wire mesh of mesh size 13 mm to 15 mm of 0.35 mm dia complete all as specified and directed by Eng-in-Charge. |
| 19 | Bond Coat :M&L applying first layer of bond coat of, Latex: Water : Cement – 1 :4 : 6 (By Weight) in single coat. Crack filling:Placement of ready to use cementitious fibre reinforced concrete to be done by using a trowel or other manual means when the bond coat is still tacky. Laying of glass fibre mesh of 45 gsm minimum and apply second layer of bonding coat over it :Water : Cement – 1 :4 : 6 by Weight. Plaster: Placement of ready to use cementitious fibre reinforced concrete to be done by using a screeding bar, trowel or wooden board when the bond coat is still tacky, application of plaster should be done. Please Enable Macros to View BoQ information |
| 20 | Bond Coat :M&L applying first layer of bond coat of, Latex: Water : Cement – 1 :4 : 6 (By Weight) in single coat. Crack filling:Placement of ready to use cementitious fibre reinforced concrete to be done by using a trowel or other manual means when the bond coat is still tacky. Laying of glass fibre mesh of 45 gsm minimum and apply second layer of bonding coat over it :Water : Cement – 1 :4 : 6 by Weight. Plaster: Placement of ready to use cementitious fibre reinforced concrete to be done by using a screeding bar, trowel or wooden board when the bond coat is still tacky, application of plaster should be done. Please Enable Macros to View BoQ information |
