Strengthening of Bus structure at SP Koil SS

All the areas whlch consideration for the repair & rehabilitation are to be providied with double legged scaffolding independent| of the work having two sets for Sam Vertical supports. The supports shall be sound and strong, tied together with horizontal pieces over whlch Scaffolding planks shall be fixed supply and fixing of scaffolding with bracing including cost of all material, all labour charges etc.

Labour charges for chiping the spalled and old concrete of the slab. Check the phenopthaline test and if there is no change in colour chip the same 730.00 Sqm further down untill, reaching the good or uncontaminated concrete. Clean the surface and make sure that surface is clean and free from loose particle at an average thickness of 50mm including cost of all material, all labour charges etc.

Drilling 1Omm dia holes up to a depth of 60mm maximum and fix 8mm dia L anchor rods 3 shaped as shear Connectors at where ever required on the surfaces of the slab or any other structural member as the case may be. Clean the same using water and make sure that there is no fine particle present in the nole.mix the base and hardner of the pölyester resig with the 2,425.00 Nos spatula thoroghly. Fll the drilled and cleaned holes to a minimum depth of 1/3 rd of the hole with the prepared polyester resin. Make sure that the resin has reached till the end of the hole. At this stage push the shear connector gently In to the hole and finish the excess resin which comes out of the hole and allow the shear connector to be undisturbed for minimum 20 minutees complete including cost of all material, all labour charges etc.

Check the dlameter of the existing rebar and if the diameter Is less than 30% of the orlginal dlameter and provide additional reinforcement. Cut the required reinforcement to the required length with proper development length. Tie them to the prefixed shear connectors dla bars as main ,180.00 Kg So that the additional rebar acts 12 25.00 Kg 2,72,500.00 monolithic with the existing ones. In case of the shear relnforcement also, if the diameter of the reabrs are reduced, provide 8mm dia stirrups in the form of 2 "U" ahaped. Tie them properly so that it has the tight Contact with the main bars.

Clean tne rebars Using the rust remover if there exists any rust, other wise clean the rebar free of foreign materlal. Mix the base and hardner of the zinc rlch epoxy resin mechanicly using a slow speed heavy duty drilling machine fitted with mixing paddle. Apply the mlxed materials to the cleaned rebar and allow it to dry complete.

Providing slurry tight form work including strutting, propping etc., which should not deform or leak due to pressure of micro concrete shall be fabricated in postlon using 6m thick Commercial plywood requlred Ine and length at all different floor levels as per the standard specification complete. Form work should be igid to prevent loss of micro Concrete at all stages & approprlate to the methods of palcng & compacting as per standard speclfication. it should be coated with shutter release agent prior to fixing. the rate shall include the cost of all the operations and etc.,

Micro concrete for the damged structural element like slab/beam/column by stocking sufficlent quaninty of micro concrete and 12mm downgraded chips on site to enbale the completion of the pouring In a continous operation. An approved concrete mixer or a sow speed heavy duty drllng machine fitted with mixing paddle shall be used. mix the mlcro concrete and the Qum 12mm down grade chips in the ratio of 1:0.5 (one part of Rendroc RG and 0.5 part 12mm down chip) by welght with required quaninty of water powder ratio 0.16 and place the same of the prefixed formwork well before he eproxy jointing compound dries up. Remove the formwork after 24 hours in the case of slab and beam check for any surface defects and if so apply the modified 18.00 54,000.00 m Each 9,72,000.00 polymer morator complete.The rate shall be include the cost of l the operations and complete

Prepare the surface neatly ensuirng ther is no fine dust accumalted over the area, and wash the surface and allow it to dry prior to the application of the prmier. Mibx the high performance, liphatic acrlate based anticarbonation protetive coating primer 8 fosroc 730.00Sqm Deckquard S Primerto the prepared 660.00 Each 4,81,800.0o surface and allow the same ro dry over a period of 2 hours over which Deckguard S top coat shall be applied two mutually perpendicular directions in order to obtaln a DFT of 150 microns over,the prepaerd area

SGST