Repair of Bridges under SEN/Kankavali Section.

A-Repair of Cracks (Rate of items are based on CR-USSOR-2021)

052060 Providing and inserting nipples of size 12 to 20 mm dia. with approved fixing compound after drilling holes for grouting as per Technical Specifications including subsequent cutting/removal and sealing of the hole as necessary after completion of grouting.

052080 Applying epoxy mortar over leached, honey combed and spalled concrete surface and exposed steel reinforcement complete as per Technical Specification with average thickness of 10mm including priming coat, mortar plaster and seal coat of epoxy.

B-Supply of cement and grouting of masonary (Rate of items are Above/

052070 Grouting of masonry/concrete by injection process duly Sealing of cracks, 2 through nipples complete as per Technical Specification andprocedure given in IRBM Para No 209 including necessary admixture.Payment shall be as per use of cement by weight in case of neatcement/cement mortar grouting and weight of Epoxy in case of Epoxy Grouting. (Cement will be paid extra). 052071 Neat Cement Grout with 20% anti shrinkage compound w.r.t. cement. Above/

C-Repair of cracks

Injecting low viscosity high molecular weight thermosett polymer like monopol or equivalent compound which can penetrate in to the cracks while pouring or applying under pressure and provides excellent adhesion and chemical reaction in to the vertical.

Coating the exposed reinforcement, new reinforcement with anti corrosive coating like 2 IPNET_RB or similar component after thoroughly de-rusting with wire brushes and cleaning to enhance durability with all contractor, consumables, tools and plants, labours, protective aids etc complete.

Sealing of cracks with EPCO 1010 high Viscosity grade epoxy sealant or similar products after making V cuts to exposed the crack, cleaning the same with all contractor's consumables, tools and plants, labours, protective aids etc complete.

Providing coating the entire repaired pipe surface with IPNET an inter- penetrating 4 polymer network concrete coating system or similar product which provides chemical resistance, tensile strength, flexibility shear strength and hardness etc as three coats (primer , middle and top ) as per prescription of manufacturer with consumables, tools and plants, labours, protective aids etc complete.

D-Excavation in all kinds of soil and providing centering (Rate of Above/

025030 centering and shuttering including strutting propping etc. and removal of 2 form for : 025031 All types of bridge sub-structures ,e.g. pier, Abutment, wing wall, retaining wall, RCC box type foundations, Abutment cap, Pier Cap, Inspection Platform & Pedestal over Pier cap, Fender wall, Diaphragm wall etc upto 5m above ground level. Above/

E-Grouting of Cracks

Grouting with M60 grade cementious grout (non shrinkofapproved make by suitable 1 means (free flowing /pump) curing etc complete as per direction of Engineer-In- Charge at all heights inside tunnel. The payment shall be made on the basis of actual weight of approved material. Note: Payment of grout will be paid under schedule F. Above/

F-Supply of grout cement

Supply of Micro Concrete Emcecrete A-10 F or equivalent specially formulated with higher size aggregate not more than 10 mm size blended with super plasticizer and synthetic fibre for easy flowablity with flow of 250- 350 mm (M60grade concrete). Above/

G-Supply of thiner and chipping of existing morter

Chipping of existing mortar to remove spelled and loose concrete upto depth of 75 mm of any grade of concrete for distressed RCC materials with Contractor's labour, tools, equipment etc. with all lead sand lift and as directed by Engineer-in-charge.

Supplying of thinner T-50 for cleaning of cracks/ joints of concrete surface Including wire brushing with contractor's own materials labour tools, equipment etc. with all leads and lift and as directed by Engineer-in-charge.

H-Providing and laying CC 1:1 1/2:3 (Rate of items are based on CR Above/

I-Cutting of Trees (Rate of items are based on CR USSOR 2021)

J-Supply of Labour

Supply of competent look men/ misc labours for various works as per requirement by engineer-in-charge.