Special Repairs at Km.75/984 (Shriram Bridge) And Km 77/400 (Karjat ROB) of Patgaon Khopoli and MNB at Km. 3/656 Km.4/057 And Km.5/292 And Culverts of Wakan-Pali-Khopoli section of NH-548A in the State of Maharashtra during 2026-27

Removal of Vegitation/Plants:-Removal of entire root inside the bridge portion. Remains of the root shall be treated with special chemical Steripure MBT 20. Top 50mm shall filled with high strength grout including cost of all material, machinery, labour, scaffolding, etc.as per specification and as directed by Engineer-in-Charge. (Item No. 47.05)

Trimming of grass, shurbs and weeds from the shoulders/berms and disposing off the same to suitable locations etc. complete (Item No. 8.17)

Sealing of crack/porous concrete with Epoxy resin grout by injection through nipples complete as per clause 2804 of Technical Specification and as per approval of Engineer. (Item No. SDB Item no. 16.7)

Providing and fixing in position Guard Railing as per Drg. No. 15 Type C dt. 20-4-79, with 3 rows of 40mm dia. G.I. pipe 30cm a part and fixed in M.S. channels of section 100 x 50 x 6mm spaced 2.5 C/c 1:2:4 c.c. bedding of size 45 x 30 x 30cm. as per detailed drawing, with 3 coats of approved of yellow and black paint including necessary excavation in any strata. (Item No. 7.08)

Providing Polymer modified cement Mortar treatment after removing of existing, clading, plaster, gunite & cleaning and preparing the surface.Applying Polymer cement bond coat and Polymer modified cement Mortar as per manufacturer specification up to 50mm thick with 8% polymer by weight of cement to fill the all cavities & making protective cover plaster including shuttering (Item No. 51.153)

Structural Repairs to damaged concrete surface with polymer concrete/mortar with AC-ACRYLATE-REPAIR and AC-BOND-AID as detailed in the method statement including material, labour, etc., all complete as directed by engineer.(Repairs to deck slab, piers, abutment, girders and other locations up to 40mm thickness). (Item No. 19.44)

Remove loose, disintegrated and porous concrete at cracks and joints. Repair the same with epoxy or polymer modified mortar. Drill injecting holes to a depth of 2-4 inches in the concrete depending upon width of cracks, extent of damage and dimension of structural elements. Fix the grouting nozzles. Clean all loose dust particles from the cracks and holes by blowing compressed air through all the nozzles in succession. Whenever required grouting nozzle can be introduced for subsequent cementitious lime grout which is based on special limes with thixotropic agents, aldehyde based polymer and selected sands having high abrasion resistance by using Lime based Hydraulic Injection Suspension as approved by Engineer in charge. Before injecting the grout, it is advisable to make sure the nozzles are free of dust. Care is to be taken that the air pressure is monitored and maintained so as not to damage the matrix. Mix cementitious lime based hydraulic ready to use-Hydraulic Injection Suspension with 35-45% water by its weight in clean container using a low speed air driven mixer/stirrer to form a mix of uniform and flowable consistency. Depending on temperature, the water demand may vary. Lime based Hydraulic Injection Suspension should have following properties: 1. Bulk Density: 1.8 0.2 2. Compressive Strength(28 days): W/P(0.45)-Appx. 10 Mpa. It shall be applied as per manufacturer's specification.(If scaffolding is required, same shall be provided and will be paid under relevant item) (Item No. 52.40)

Repair of RCC railing to bring it to the original shape, cleaning and repainting as per drawings etc. complete (Item No. 8.20)

Providing uncoursed rubble trap/quartzite/gneiss stone masonary in cement mortar 1:5 for piers, abutments, wings, returns, head-walls, parapet etc. including bailing out of water, striking joints of the non exposed faces, pointing the exposed faces with cement mortar 1:3, scaffolding, watering to masonary and etc. complete. (Item No. 11.07)

Providing and applying epoxy paint primer with middle coat and top coat to superstructure including scaffolding etc complete. (Item No. 19.04)