Municipal Council Tender

Removing all loose / unsound concrete beyond corroded reinforcement to be removed upto 50mm and treating the exposed reinforcement with rust remover Reebaklens RR with brush for complete wetting of rusted metal surface and allowed to react it for 16-24 hours. Cleaning the bars with wire brush, finish by thoroughly washing down with clean water and completely drying the bars before application of Anti corrosive coating in 1 : 1 and 1 : 4 (Reebaklens RR {cleaning agent to water}) and then treat the steel with epoxy based zinc rich anti corrosive coating NITOZINC Primer over the steel rebarrs. The zinch rich primer shall be applied at 40 microns dry film thickness and shall have salt spray resistance of 5 mg for 96 hours as per ASTM B-117 and adhesive bond strength 1.5 MPa as per ASTM D4541 etc. all complete as per direction and entire satisfaction of Engineer-In-Charge.

Providing and applying bonding agent Sikka,Doncreat , Fosroc,IPSS,or equalant make of approved by engineer- in- charge. Nitobond EP which shall be a solvent free epoxy based two component resin system . The bonding agent shall be applied by brush & should remain in tacky state after application for a minimum period of 5-6 hrs at 20 deg C & 2-3 hrs at 30 deg C. The product shall achieve 50 N/mm2 compressive strength, 20 N/mm2 tensile strength, 35 N/mm2 flexural strength and 10 N/mm2 shear strength as per BS 6319 standards. The adhesive bond to the concrete substrate shall exceed the tensile strength of the host concrete etc. all complete as per direction and entire satisfaction of Engineer-In-Charge. It shall not be used in the influence zone of the Fosroc Galvashield anodes in case of installation in the periphery of patch. No bond coat shall be applied in case of installation in a grid pattern.

Providing and applying dual shrinkage compensated fiber reinforced polymer modified repair mortar Renderoc HS Xtra,Sikka, Doncreat , Fosroc ,IPSS,or Equalant make of approved by engineer- in- charge. on the prepared surface and curing with curing compound.The repair mortar used shall be single component and shall be mixed with water at water powder ratio of 0.16 and shall have drying shrinkage 300 microstrain as per ASTM C 157-93; permeability 5mm as per DIN 1048 Part 5 ; compressive strength 70 MPa ; Flexural Strength 9Mpa as per BS 6319 ; RCPT 1800 Coulumbs and Class A1 fire rating as per EN 1504-3 Cl 5.5 etc. 35 mm(Average) all complete as per direction and entire satisfaction of Engineer-In-Charge and as per existing pattron.

Supply and application of Concure AB white,Sikka,Doncreat , Fosroc, IPSS,or equalant make of approved by engineer- in- charge. water based, white pigmented, acrylic emulsion curing compound for concrete and mortar. The curing compound should compliance to ASTM C309 type2 class B. Concure AB White should be applied uniformly by brush, roller or spray, with no overlap of applications. Under standard site conditions, a single coat of Concure AB White applied at a uniform rate of 5.0 to 7.5m2 per liter. The applied film should not be trafficked until fully dry, and care should be taken to ensure that the film is not broken. The curing compound should be environmental friendly, should have excellent moisture retention having moisture loss 0.55 kg/sqm as per ASTM C156, and drying time of 3 hours at 23°C as per ASTM C135, M8.3 etc. all complete as per direction and entire satisfaction of Engineer-In-Charge.

Providing and applying water based primer + two coats of acrylic, breathable, elastomeric, water based, anti-carbonation coating Dekguard E2000 to all concrete members above ground. Coating must be applied to achieve total dry film thickness of not less than 200 microns and shall have Carbon dioxide diffusion resistance equivalent air layer thickness (DIN EN 1062-6) 50 m; Carbon dioxide diffusion resistance equivalent air layer thickness (Taywood Method) = 240 m; Carbon dioxide diffusion resistance equivalent thickness of 30N concrete (Taywood Method) 500 mm; Carbon dioxide diffusion resistance co-efficient (DIN EN 1062-6) 7.50 X 10^5; Elongation of cured film shall be (ASTM D 412) 200%; Chloride Ion Penetration (ASTM C 1202-03) = Very Low (100 to 1000 Coulombs); Tear Resistance (ASTM D 624) = 12 N/mm; Static Crack spanning capability (ASTM C 836-Modified) = 2mm; UV Resistance (ASTM D 4587,Condition E Cycle 1 from ASTM G154) 500 Hours; Reduction in Water Absorption (ASTM C642) 82%; Adhesion (ASTM D 4541) 1 N/mm2 and Solar Reflectove Index of 105 amd emissivity 93% as per ASTM E 1980 etc. all complete as per direction and entire satisfaction of Engineer-In-Chargeand matching with existing shade of facade.

Providing and applying Epoxy resin based putty Nitocote VF, Sikka,Doncreat , Fosroc,IPSS,or equalant make of approved by engineer- in- charge. having a density of 1.6 g/cc, volume of solids as 100%, compressive strength of 50 N/mm2. Mixing to be carried out using a slow speed srill with a suitable mixing paddle making sure all the components are throughly mixed. The prepared paste is applied over the prepared concrete surface to get an even concrete profile etc. all complete as per direction and entire satisfaction of Engineer-In-Charge.

Make "v" groove along length of crack, remove all dust and loose particles and place injection ports at spacing of 200 to 500mm center to center spacing depending on porosity of substrate, seal the cracks with epoxy putty followed by pressure grouting with Conbextra EP10 low viscous solvent free two component epoxy resin having density of 1050 kg/m3. The epoxy injecting materials shall have viscocity 0.6 poise as per ASTM D1200, compressive strength 80 MPa as per ASTM D 695 and bond strength 4 MPa as per ASTM C882 etc. all complete as per direction and entire satisfaction of Engineer-In-Charge. Product used shall have CE (CE-29842) marking and compliance according to Construction Products Directive 89/106/EEC (CPD).

Provide and install sacrificial zinc anodes Fosroc Galvashield XPI, sikka ,IPSS, or equal mak as per approved by engineer in charge , to prevent initiation of corrosion of steel reinforcement in chloride-contaminated or carbonated concrete or new construction. Zinc mass should be Min. 60 g/unit or More and the zinc surface area and spacing of anodes should be selected/designed in a way to achieve the target service life of 10/15/20 or more( to be confirmed by the consultant/end user before the design) Years. The quality of zinc should be in compliance with ASTM B418-95a, Type I, die-cast around steel tie-wires (in case of more than one tie wire they should be well seperated) and encased in a highly alkaline cementitious mortar (encapsulating mortar) with a pH of 14 or greater. The encapsulating mortar should not have sulphates, chlorides, bromides or any other elements corrosive to steel. The encapsulating mortar should have interconnected and fine pore structure to dissolve, transport and accommodate zinc corrosion products away from the zinc surface without causing additional stress to the cover concrete, and maintain a pH 14 at the immediate vicinity of uncorroded zinc for the desired service life. Anode units shall be supplied with integral well-separated tie wires without splices (in case of more than one wire) and with loop ties for directly tying to the reinforcing steel. For patches in grid pattern or periphery of patches with 2 to 8 anodes/m2 (to be confirmed as per designed) area of concrete, the spacing can be 430 to 610 mm or as per manufacturer's specifications. The anode size and shaping shall deliver a minimum current density to the steel adjacent to the repair of 0.4/0.8/1.6 mA/m2 (choose as per the chloride content) of steel surface area at the end of the design life based on the chloride level of 0.8% / 0.8-1.5% / 1.5% [choose as per the test results] by weight of cement taking into account an anode aging factor calculated from previous field installations and the in-service environment. Anodes should meet the target service life, which can be estimated using Galvanic Anode Performance (GAP) test developed at IIT Madras for severe exposure condition (high humid and high chloride conditions). The anodes shall be covered with bed-mortar of resistivity less than 50 kOhm-cm or similar to the parent concrete on the cleaned steel reinforcement as per manufacturers specification before applying passivation coating. All necessary design calculations for spacing of anodes, installation training, installation confirmation, monitoring of set of anodes to confirm current from anodes as per ISO 12696 or as per the design, etc. shall be carried out by a NACE Certified CP Technician, CP2 or higher, complete at all heights and including of all materials, labour, tools, plants and machineries as directed by Engineer-in-charge and/or consultant.RATES INCLUDES Supply, installation, spacing calculation, QAP etc. Approved brand shall be M/s Fosroc Galvashield Anodes The anodes shall be covered with bed-mortar of resistivity less than 50 kOhm-cm or similar to the parent concrete on the cleaned steel reinforcement as per manufacturers specification before applying passivation coating. All necessary design calculations for spacing of anodes, installation training, installation confirmation, monitoring of set of anodes to confirm current from anodes as per ISO 12696 or as per the design, etc. shall be carried out by a NACE Certified CP Technician, CP2 or higher, complete at all heights and including of all materials, labour, tools, plants and machineries as directed by Engineer-in-charge and/or consultant.RATES INCLUDES Supply, installation, spacing calculation, QAP etc. Approved brand shall be M/s Fosroc Galvashield Anodes

Provide sacrificial zinc anodes Fosroc Galvashield CC4 Sikka ,IPSS, or equal mak as per approved by engineer in charge , to control the ongoing corrosion and prevent initiation of corrosion of steel reinforcement in chloride-contaminated or carbonated concrete. Galvashield CC4 type anodes or equivalent of cylindrical shape with size of 36 mm dia. X 100 mm, and core should be star shaped with required high surface area of zinc, and spacing of anodes should be selected/designed in a way to achieve the target service life of 10/15/20 or more ( to be confirmed by the consultant/end user before the design) Years. The anode shall be able to supply a current of 0.6/1.2/2.4 mA/m2 (choose as per the chloride content) of steel surface area at the end of the design life based on the chloride level of 0.8% / 0.8-1.5% / 1.5% [choose as per the test results] by weight of cement. The quality of zinc should be in compliance with ASTM B418-95a, Type II, die-cast around an integral, unspliced, uncoated, nongalvanized steel lead wire and encased in a highly alkaline cementitious mortar (encapsulating mortar) with a pH 14 or greater.The encapsulating mortar should not have sulphates, chlorides, bromides or any other elements which are corrosive to the embeddding steel as per ACI 562-13, and the encapsulting mortar shall have interconnected and fine pore structure to dissolve, transport and accommodate zinc corrosion products away from the zinc surface without causing additional stress to the cover concrete, and maintain a pH 14 at the immediate vicinity of uncorroded zinc for the desired service life. Anode units shall be supplied with necessary rebar connector, anode connector from anode manufacturer to maintain the connection for design life for connection to rebar and anodes installed in Hole drilled of size 45 mm dia and 130 to 140 mm deep to be installed in grid pattern with 2 to 8 anodes/m2 area of concrete, the spacing can be 350 to 750 mm or as per manufacturer's specifications and design . The anodes shall be covered with bed-mortar of resistivity less than 50 kOhm-cm or similar to the parent concrete on the cleaned steel reinforcement as per manufacturer's specifications. All necessary design calculations for spacing of anodes, installation training, installation confirmation, monitoring of set of anodes to confirm current from anodes shall be carried out by a NACE Certified CP Technician, CP2 or higher complete at all heights and including of all materials, labour, tools, plants and machineries as directed by Engineer-in-charge and/or consultant.RATES INCLUDES Supply, installation, spacing calculation, QAP etc. Approved brand shall be M/s Fosroc Galvashield Anodes.

Disposal of building rubbish/ malba/ similar unserviceable, dismantled or waste material by mechanical means, including loading ,transporting and unloading the same at any C&D waste management site within 25 kms lead i.e. Shastri park/ Burari/ Mundka including weighing at plant etc complete as per direction of Engineer in charge. Weighing and unloading at plant shall be as per procedures/rules of the plant management. The rates are inclusive of all operations, labours, lead and lifts from site of work to the C&D waste plant. The processing fee of C&D management at prescribed rates will be deposited by the agency and the same shall be reimbursed by department on production of only original cash receipts.