ADDN AND ALTN TO ROOF TREATMENT AND STRUCTURAL REPAIRS OF CERTAIN SENIOR SAILORS MARRIED ACCOMMODATION AT NAVAL STATION KARANJA

Amount

Complete removal of existing water proofing treatment of any description and in any position including PCC padding any thickness and cleaning, wire brushing, watering and removal of debris outside MOD complete all as specified and as directed by Engr-in-charge. Note: Unit rate quoted shall also include for removal of PVC water storage tank wherever existing carefully and refixing at the same or other position after completion of roof repair work.

Material and labour for cutting out cracks to V-section in existing roofs or terracing, cleaning out and filling solidly with a hot mixture of bitumen and clean dry sand 1:1 (by weight) complete all as specified and as directed by Engr-in-charge.

Roughening surfaces of old concrete floors by picking, sweeping clean and washing down with waters to remove dusts etc., complete all as specified and as directed by Engr-in-charge.

Material and labour for brushing neat cement slurry with 3kg/ sqm complete all as specified and as directed by Engr-in-charge.

Material and labour for PCC 1:2:4 type B2 (Using 40mm graded stone aggregate) as in concrete padding laid to required slope including finishing the concrete surface fair and even without using extra cement complete all as specified and as directed by Engr-in-charge.

Material and labour for 10mm thick screed bed or bedding layer of mortar in cement mortar (1:4) for laying roof finish as padding finished with WPC 3% by weight of total cement complete all as specified and as directed by Engr-in-charge. Note: Integral WPC shall be measured and paid separately.

Material and labour for apply oil bound bitumen primer @ 0.40 Litre / Sqm manufactured by the same agency as that of APP with density of 0.87 to 0.89 Kg / Litre at 25 degree Celsius on the prepared dry roof surface complete all as specified and as directed by Engr-in-charge.

Material and labour for APP polymeric membrane minimum weighting 3 kg/ sqm and minimum 3mm thick reinforced with polyster non woven fabric (weight not less than 150 gms/sqm) laid on primed surfaces by torch application method complete all as specified and as directed by Engr-in-charge.

Material and labour for preparation of new surfaces of any description not otherwise described over 10cm width or girth and applying two coats of solar reflective aluminium paint @ 0.10 kg/sqm membrane surfaces complete all as specified and as directed by Engr-in-charge.

Chipping, removing carefullly concrete work by low impact hammer, breakar without damaging the structure and cleaning and disposal of debries out side the premises etc., complete all as specified and as directed by Engr-in-charge. Note: Hard concrete should not be removed by force.

Material and labour for carrying out application of ‘Bi-polar migratory corrosion inhibitor' EPCO-KP-100 on concrete surface. This inhibitor has migratory kind of property which permits the material to migrate to a virtual extent of 100mm, through pores of concrete, inhibiting the corrosion and de-passivating the Electro-chemical reaction. It has property to attack anode as well as cathode, which is purely alkaline in nature (pH-9.5), so it has no carcinogen activity with concrete complete all as specified and as directed by Engr-in-charge.

Material and labour for cleaning existing reinforcement with wire/ rotary wire brush, making the surfaces free from loose material dirt etc. complete and applying two coats of alkaline rust converting primer on the rebars, including cleaning the reinforcement, wire brushing to remove loose rust spalls, wash the rebars with clean water within 3 min and wipe it dry complete all as specified and as directed by Engr-in-charge.

Material and labour for drilling and fixing Rohibb Teflon nozzles in RCC members, including drilling holes of 12mm dia, 50 to 100mm deep holes. Works shall be carried out as under: (i) Cleaning of holes: Clean the holes by air blower prior to fixing nozzles. (ii) Fixing of nozzles: Insert 12mm dia. Rohibb Teflon nozzles in cleaned holes. External end of nozzles to be machine to receive outlet of grouting gun. Fix it inside the holes by applying thixotropic epoxy putty to ensure complete sealing. Cure the system for min.12 hrs. (iii) Cutting of nozzles: Cut the nozzles by chisel after completion of grouting without damaging structural elements. (iv) In case crack upto 2mm wide, fix the injection nozzels directly over the cracks, at intervals of 6 to 9 inches, using a drilling machine. Fix PVC/MS nozzels in these holes with fast-setting epoxy putty & let it dry for 2 to 3 days. Also, seal the crack between the ports with epoxy putty. (v) In case where the crack is wider than 2mm upto 4 to 5mm, drill holes at the sides of the crack in a staggered fashion, at intervals of 6 inches and affix them with epoxy putty as mentioned above. (vi) Also, seal the face of the carck with a liberal application of the epoxy putty.

Material and labour for injecting of site mixed cement slurry grout, mixed in specified proportion containing cement, sand water with addition of plasticizers (approved make) and migratory corrosion inhibitors, water cement ratio shall be varied between 0.5 to 1.0 for each hole, shrinkage compensating cement slurry mixed to a lump free fresh creamy consistency, Mixing shall be done by mechanical mixer continuously stirring mechanically to keep cement particles in suspension. Injection of approved/specified grout by means of pump at a pressure of 3-5 Kg/cm2 etc complete till the grout mix flows out from the nozzle indicating complete filling of grout in the holes drilled complete all as specified and as directed by Engr-in-charge.

Material and labour for Injecting low viscosity (3-5cps) high molecular weight monomer by pressure and using mechanized injector gun with accessories till nozzles refuses to accept the grout, Including, Mixing of materialas: Mixing of material components (part A&B) in the required quantities as per manufacturer's instruction by weigh batching. Grouting:Fill the grouting gun with concrete penetrating corrosion inhibitor EPCO-KP-100. Maintain desired pressure in the gun by air compressor; maintain the pressureat exit (2 to 3kg/cm2) by monitoring pressure guage at exit. Grout the material through prefixed nozzles in the structural elements @ 100ml per nozzle. Repeat the process for all the nozzles complete all as specified and as directed by Engr-in-charge.

Material and labour in replacement of corroded steel reinforcement with new /fresh reinforcement complete all as specified and as directed by Engr-in-charge. Note: Replacement of corroded steel reinforcement to be undertaken when 20% of cross section is reduce due to corrosion.

Material and labour for anticorrosive treatment to reinforcement by application of two coats of IPNET RB (CBRI Know how) by brush on exposed reinforcement with time interval of minimum 4 hours between each coats complete all as specified and as directed by Engr-in-charge.

Material and labour for providing and applying structural grade epoxy-latex bond coat prior to application of any type of mortar confirming to ASTM-C- 882-91 (Arizona Slant Shear Test) to ensure bond between old concrete and new concrete by brush application complete all as specified and as directed by Engr-in-charge.

Material and labour for building up the profile of structural members by using latex B2 modified air cured mortar system in damaged areas (1 Cement- 3 part graded cleaned pre-packed river sand- 5 to 10% latex mortar by weight of cement- 0.35% w/c ratio) in 20mm thickness including leveling profiling etc., complete all as specified and as directed by Engr-in-charge.

Material and labour for providing and applying jacketing around columns with Micro concrete (Molith-MC) M40 including all lifts, shuttering, drilling holes and fixing shear anchor as per specification complete all as specified and as directed by Engr-in-charge. Note: Reinforcement shall be measured and paid separately. Rates including jacketing, formwork and micro concrete all as per manufacturer's instruction.

Supply only water proofing compound complete all as specified and as directed by Engr-in-charge.

M/s Vishwakarma Enterprises

M/S Rana Enterprises