Retrofitting Works

← All sections of BMC USOR 2023 (Buildings)

Code	Description	Unit	Rate
R3-CS-RF-1	Application of Corrosion Inhibitor: Providing & applying One coat of Concrete Penetrating Corrosion Inhibitor (Surface applied) which works on Bipolar Inhibition Mechanism on entire concrete surface to be repaired by using brush or spray at 250 ml per Sq.Mt./Coat or as per manufacturer’s specification and prior to application of first coat of anti corrosive coating to reinforcement.	sqm	₹ 164
R3-CS-RF-2	Anti Corrosive coating to exposed reinforcement: Providing & applying Two coats of Anti Corrosive protective coating (CBRI / CSIR technology) for reinforcement bars by brush. Sprinkle dry sand when second coat is tacky so as to get rough surface.	MT	₹ 6,031
R3-CS-RF-3	Shear Connectors: Make 10/12 mm dia holes using heavy duty electrically operated hammer drills in the concrete of RCC members to a depth of about 75 mm at 500 mm c/c or at suitable grid in zig-zag fashion, clean the holes using air jet and fix pre- fabricated 100 x 50 mm L-shape 8 mm dia rebar using Anti Corrosive protective coating so that 75 mm out of 100 mm is inserted inside the concrete and 25 mm remain outside along with 50 mm bend. The shear connectors are used to tie the additional reinforcement bars	nos	₹ 561
R3-CS-RF-4	Additional Reinforcement: Cutting, bending and fixing in position steel reinforcement of specified/required sizes and shapes in the form or main rebars, stirrups & rings, distribution rebars etc., and tying them to shear connectors using GI binding wire. The additional rebars should be coated with TWO coats of Anti Corrosive protective coating & dry sand to be sprinkled on second coat.	MT	₹ 56,919
R3-CS-RF-5	Bond Coat: Providing & applying One coat of structural grade epoxy bond coat by brush conforming to ASTM-C-882- 87 to the prepared concrete surface to be repaired / strengthened. This is applied prior to the application of polymer repair mortar / epoxy mortar / Microconcrete to have monolithic action between old concrete surface and new concrete surface	sqm	₹ 520
R3-CS-RF-6	Repair with Polymer Modified Mortar (PMM): Repairs to the deteriorated / damaged areas of RCC elements in the structure shall be carried out by using powder Polymer Modified repair mortar. The polymer modified mortar is applied when the epoxy bonding coat is still tacky. In one application 25 mm thickness shall be built. Subsequent layer shall be built with one bond coat of Polymer modified cement slurry. The polymer modified repair mortar shall be mixed, applied and cured as per technical	sqm	₹ 1,598
R3-CS-RF-8	Repair with Microconcrete: Providing, mixing and placing 50 to 100 mm thick encasement with free flow high performance micro- concrete as per technical specification.	sqm	₹ 7,342
R3-CS-RF-9	Sealing of Plaster, IPS and non structural Cracks: Sealing of plaster, IPS and non- structural cracks with non-shrink compound using spatula or putty knife.	rmt	₹ 315
R3-CS-RF-10	Injection Grouting of Super low Viscosity Epoxy Grout System: Pressure grouting Super low viscosity epoxy resin using injector till nozzles refused to accept the grout under pressure of 3-4 Kg/cm2. Grout the material through pre-fixed nozzles in the structural elements and subsequently cutting /removal of nozzles and sealing of holes with putty Monitor the leakages through other nozzles while grouting and seal them as per the	cum	₹ 518,507
R3-CS-RF-11	Injection Grouting High Performance Polymer Cement Grout: Providing & injecting high performance non shrink, Anti- washout Polymer Cement Grout per pack of 225gm for 50kg bag of cement as per manufacturer’s specifications into honeycombing area / porous concrete with suitable pump at pressure of 2.0 Kg/Cm2 and subsequently cutting /removal of nozzles and sealing of holes with grout etc., complete. This does not include the rate of cement bag.	Per 50KG Bag Of Cement	₹ 500
R3-CS-RF-12	Glass Fiber Wrapping System: Providing & laying applying Glass Fiber sheet wrap at structural members Including, Providing & laying applying Glass Fiber sheet wrap at structural members Including , Profiling: Applying PRIMER on prepared substrate, filling holes and uneven surface with PUTTY etc., complete. Wrapping: Wrapping the Glass fibre wrap to structural element at desired orientation using tamping roller to avoid any air voids etc., Repeat the same procedure for multiple layer with interval of 8 hours. , Sand Pasting: Applying saturant, 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 Fiber consume and not application of surface area.)	sqm	₹ 4,140
R3-CS-RF-13	Carbon Fiber Wrapping System: Providing & laying applying Carbon Fiber sheet wrap at structural members including Surface Preparation: Grinding / moulding concrete substrate, cleaning it with wire brush, removing oil, laitance if present, rounding sharp edges to min 25 mm radius etc., complete. Profiling: Applying PRIMER on prepared substrate, filling holes and uneven surface with PUTTY etc., complete. Wrapping: Wrapping the Glass fibre wrap to structural element at desired orientation using tamping roller to avoid any air voids etc., Repeat the same procedure for multiple layer with interval of 8 hours. Sand Pasting: Applying saturant, 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 Fiber consume and not application of surface area.)	sqm	₹ 5,520
R3-CS-RF-14	Providing & mixing Bipolar Concrete Penetrating Corrosion Inhibiting Admixture to provide corrosion protection to both anodic and cathodic sites on the steels surface in fresh concrete	cum	₹ 856
R3-CS-RF-15	Galvanic Protection of Reinforcement in concrete: Providing & fixing zinc based galvanic anodes to the reinforcement. The anode shall be connected to the reinforcement steel by connectors provided with the anode application area is at the junction of repair. One anode per meter including tying to the bar etc., complete.	nos	₹ 1,201
R3-CS-RF-16	Application of Rust Converter: Providing & applying One coat of Alkaline Rust converting primer conforming to ASTM-B- 117, to exposed existing rebars after removing & cleaning loose rust by wire brush and leave it for 6- 8 hours.	sqm	₹ 142

Source: Unified Schedule of Rates 2023 (Buildings), Municipal Corporation of Greater Mumbai. Rates are shown as published; check the official book and its correction slips before you submit an estimate. BESTimate is not issued by or affiliated with this department.

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