SPECIAL REPAIRS / REPLACEMENT TO DISTRESSED CONCRETE IN STRUCTURAL MEMBERS IN BLDG NO P-26 AT DCA COMPLEX PHASE-III UNDER GE (SOUTH) BANGALORE

Amount

M&L for providing and erecting at site self -Supported steel H- Frame Scaffolding only for structural repairs of column with micro concrete or columns jacketing with cross bracings of good quality without dents and corrosion to reach place of work including approaches, extension, working platform ladders, lifting tackle necessary wall anchors for men and materials till completion of all structural repair items of work and curing period etc. complete. The work should be carried out with all the safety belt and adequate labour insurance under the supervision of qualified supervisor this item should be used only for structural repair work for entire period of building. (Payment should be only once irrespective of duration of scaffolding.) etc. complete all as specified & directed .

Demolition of brickwork or stone boulder masonry, built in cement mortar or cement lime mortar including all quoins, arches, pillars, etc, but excluding ashlar facings, dressed stone work and precast concrete articles complete all as specified and as directed.

M&L for demolishing cement concrete manually/ by mechanical means including disposal of unserviceable material within premises at a suitable stacking location at ground level including all lead & lifts as per direction of Engineer-in-charge without disturbing the other structural elements.

Demolishing reinforced cemet concrete Roofs, floors (other than ground floors), beams, staircases, landing, chajjas and similar suspended work including cutting of reinforcement complete all as specified and as directed.

Excavation in trenches, n exc 1.5 m wide and n exc 1.5 m in depth; for foundation, etc. or for shafts, wells, cesspits, manholes, pier holes, etc. n exc 10 sq m on plan and n exc 1.5 m in depth and getting out in soft/loose soil complete all as specified and as directed.

All as per item No here-in before but for each additional 1.5m or part thereof in depth beyond the first 1.5 m complete all as specified and as directed.

Returning, filling in, including spreading, levelling, watering and well ramming in layersnot exc 25 cm complete all as specified and as directed.

Removing excavated material exc. 250 m but n exc. 500 m and depositing where directed complete all as specified .

Pumping out water caused by springs, tidal or river seepage, broken water mains or drains or rising of water table while excavation complete all as specified and as directed

Breaking carefully the loose concrete of distressed member without damaging existing strong concrete by means of sharp means of sharp chisel which should tempered regularly of high frequency low impact hammers used, cleaning the surface by water jet pressure pump at 4 to 5 kg/ sqcm pressure to remove chlorides and loose particles , air drying the surface etc. The work should be carried out with all the safety measures like helmet, safety belt and adequate labour insurance under the supervision of qualified supervisor. ( The damaged ceiling / concrete will be measured) etc. complete all as specified and as directed

Providing and erecting steel tubular props of required height upto 14' feet, L head or flat head braced at center and supporting a continuous 2"x 3" wooden runner , resting on wedge and block minimum capacity 3 Ton to support the structure provisionally during repair and jacketing etc. and maintain them in position till required item etc. complete. The props are erected in perfect vertical in plumb taking /transferring the load equally/ uniformly . The location of every prop should be one over another floor and it should not be eccentric. The tightening of every prop should be uniform to all props to strain the building uniformly, removing the same as and when directed by structural engineer/ site Engineer. The work should be carried out with all the safety belt and adequate labour insurance under the supervision of qualified supervisor and remove the same completion of work etc. complete all as specified and as directed

Cleaning the existing reinforcement with hammer tapping and wire Brush/ rotary wire brush, fixed to hand drill machine, making the surfaces free form loose corrosion material, dirt scaling etc. complete. Applying two coats of polymer based alkaline rust converting primer confirming to ASTM-B 117 by means of paint brush, liberally all over in two coats of 1 hour between the costs, The product should converts the rust in to stable oregano metallic complex molecule layer, this should also act as primer to further treatment of steel etc. complete . The work should be carried out with all the safety belt and adequate labour insurance under the supervision of qualified supervisor. ( the damage celling/ concrete shall be measured) etc. complete all as specified and as directed Make: Sika, SP Concare, Chembond, Krishna Conchem, FOSROC Chemicals - Reebaklens RR, Dr. Fixit, ROFF, CICO, BASF, Hilti/Fischers, Sunanda Speciality Coatings Pvt. Ltd.

Providing and applying two coats of concrete penetrating hi- tech corrosion inhibition mechanism inhibits corrosion of steel in concrete at the poles, cathode & anodic simultaneously on concrete surface which is prepared earlier. The work should be carried out with all the safety measures like helmet , safety belt and adequate labour insurance under the supervision of qualified supervisor. ( The damage ceiling/ concrete all be measured) etc. complete all as specified and as directed. Make: Sika, SP Concare, Chembond, Krishna Conchem, FOSROC Chemicals, Dr. Fixit, ROFF, CICO, BASF, Hilti/Fischers, Sunanda Speciality Coatings Pvt. Ltd.

Making up lost section of concrete / mortar up to 50 mm thick thixotropic repair mortar is one component thixotropic dual shrinkage compensated fiber reinforcement formulation for structural members. Build up section by hand packing as per manufacturers specification , applied by mean of hand glues by expert applicator, the rehabilitee surface should be free from air gaps, voids should be in line with existing required line and line with existing surface, including curing, cleaning the area etc. complete. The work should be carried out with all the safety measures like helmet, safety belt and adequate labour insurance under the supervision of qualified supervisor etc. complete all as specified and as directed. Make: Sika, SP Concare, Chembond, Krishna Conchem, FOSROC Chemicals - Renderoc HS Xtra, Dr. Fixit, ROFF, CICO, BASF, Hilti/Fischers, Sunanda Speciality Coatings Pvt. Ltd.

Providing and applying 15 mm thick polymer mortar to load carrying R.C.C member in two layers in proportion of 1:5:15 by weight polymer of approved quality and make, cement and wash quartz sand with required W.C. ratio for desired floating, curing after initial setting time etc. complete all as specified and as directed. Make: Sika, SP Concare, Chembond, Krishna Conchem, FOSROC Chemicals, Dr. Fixit, ROFF, CICO, BASF, Hilti/Fischers, Sunanda Speciality Coatings Pvt. Ltd.

Replacing distressed / loose/ cracked/ porous carbonated, loose part of concrete and repairing the damaged surface of concrete , fix the form work/ structural element, pour the free flow ready mix micro concrete mix with water as per manufacturer’s instructions in the form work. Micro concrete with should be mixed in steel tray homogeneously make up concrete is based on types of structural element and its location. The work should be carried out with all the safety measures like helmet, safety belt and adequate labour insurance under the supervision of qualified supervisor etc. complete all as specified and as directed. . Make: Sika, SP Concare, Chembond, Krishna Conchem, FOSROC Chemicals - Renderoc RG, Dr. Fixit, ROFF, CICO, BASF, Hilti/Fischers, Sunanda Speciality Coatings Pvt. Ltd.

Providing and Fixing Shear connectors of 8mm dia. TMT steel with two component, styrene & cement free, epoxy-acrylate fixing and anchoring compound supplied in self-mixing Cylinder-in-cartridge form that avoids site mixing using standard sealant applicator gun after drilling holes of 12mm diameter to a minimum depth of 100mm at required locations, inclusive of all material, manpower and equipment. Make: FOSROC Chemicals-BLokfix E75, Sika, SP Concare, Chembond, Krishna Conchem, Dr. Fixit, ROFF, CICO, BASF, Hilti/Fischers, Sunanda Speciality Coatings Pvt. Ltd.

Mild steel TMT bars 8 mm dia and over, cut to length, bent to shape required, incl. cranking, bending spirally for hooping for columns, hooking ends and binding with and incl. mild steel wire (aneealed) not less than 0.9 mm dia or securing with clips complete all as specified and as directed.

S&F Mild steel TMT bars 5 mm dia and over upto 10mm, cut to length, bent to shape required, incl. cranking, bending spirally for hooping for columns, hooking ends and binding with and incl. mild steel wire (aneealed) not less than 0.9 mm dia or securing with clips as in stirrups, spacers and binders complete all as specified and as directed.

Providing and applying approved epoxy resin EPI / NITO Bond of Krishna conchem or equivalent before polymer plaster/ concrete to have the perfect bond between old concrete and new concrete/ polymer plaster surface confirming to ASTM-C- 882-87 using nylon brushes scaffolding labour etc. complete all as specified and as directed. .Make: Sika, SP Concare, Chembond, Krishna Conchem, FOSROC Chemicals, Dr. Fixit, ROFF, CICO, BASF, Hilti/Fischers, Sunanda Speciality Coatings Pvt. Ltd.

Providing and applying priming cum bonding coat of polymer of approved make and quality as approved by engineer- in - charge and cement slurry in 1:1 proportionate by weight to concrete area by brush or any other established method etc. complete. Make: Sika, SP Concare, Chembond, Krishna Conchem, FOSROC Chemicals, Dr. Fixit, ROFF, CICO, BASF, Hilti/Fischers, Sunanda Speciality Coatings Pvt. Ltd.

Drilling and fixing Teflon perforated nozzles in RCC member, including drilling 14 mm dia. 50to 100mm deep holes in structural members at in cle the intervals of 600 mm in staggered manner of as directed by the consultants in RCC structural elements. Clean the holes by air blower prior to fixing nozzles. fixing of nozzels in cleaned holes. External end of nozzles to be machined to receive outlet of grouting gun. nozzle is fixed by means of epoxy sea lent to ensure complete sealing . Cure the system for min. 12 hours. the work should be carried out with all the safety measures like helmet, safety belt and adequate labour insurance under the supervision of qualified supervisor. etc . complete all as specified and as directed

Injecting low viscosity grade epoxy grout by pressure by epoxy or grouting pump and compressor. Mixing: - Material components DR BECK 505C + EK 411 HARDNER + SOLVENT 100:50:50 weight batching. Grouting, fill the grouting gun with resin mix, maintain desired pressure at exit (7 to 10 kg /Cm 2) by monitoring pressure gauge at exit . Grout the material through prefixed nozzles in the structural elements till its refusal. Seal the nozzle with epoxy sea lent (EPCO 10) after the refusal. Monitor leakages through other nozzles while grouting and seal them as per the requirement. Repeat the process all the nozzles. Complete the operation at pot life of material , grouting is continued to all the nozzles from bottom to top and not from top to bottom . Cleaning the gun and accessories (Valves, pipes and other fixtures) with T- 60 thinner / or equivalent of dr. fixit , Krishna chemical, sunanda etc. The work should be helmet , safety belt and adequate labour insurance under the supervision of qualified supervisor etc. complete Make: Sika, SP Concare, Chembond, Krishna Conchem, FOSROC Chemicals

Drilling and fixing 8mm,10mm,12mm,16mm, 20mm, 25mm, re-bars with 'Fischer/Hilti' system and chemical, etc.The following sizes:- Note:Steel to be paid separately .

rahi consultant

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