138WE/L-207/2025-26

Preparing of floor including repair and cleaning of old concrete by way of washing, removing loose concrete all as specified and/ or as directed by Engr-in-Charge.

Material and labour for cleaning the joints to remove all dust, dirt, oil & grease and the excessive laitance be removed by vacuum cleaning and filling dummy/ contraction/ expansion joint of size 10mm wide and 110mm deep from top by applying epoxy primer, Nitoprime 25 and filling the joint in two part with epoxy resin primer nitoflor TF5000 of Fosroc or equivalent of Sika India Ltd, Choksey Chemicals Ltd, Thermax Ltd, BOSTIK India Pvt Ltd or equivalent make as approved by GE, complete all as specified and / or as directed. Note : Only joint filling work to be carried out in the existing joint cut in cement concrete floor. 15mm wide and 10cm deep contraction/ dummy joints filled by epoxy grouting for a guarantee period of 03 years.

Material and labour for Scratch coating with Fosroc Nitoflor SL3000 UT/ Tremco (Flowfresh, flowcrete)/ Pidilite or equivalent at a coverage rate of up to a nominal 1mm thickness; actual coverage rate will depend on concrete surface texture and porosity without any extra cost. This scratch coat is designed to prime and seal the floor, mixed and spread evenly by trowel. The scratch coat should be allowed to cure for 12-48 hours at 20 degree celcius before applying the Nitoflor RT 6000 UT/Tremco (flowcrete)/ Sika or equivalent, complete all as specified and/or as directed by Engr-in-Charge.

Providing and applying trowel applied heavy duty Cementitious polyurethane floor topping at 6 mm thickness using Fosroc Nitoflor RT 6000 UT a five-component product/ Tremco (flowcrete, Flowfresh - RT /Pidilite or equivalent). A forced-action rotary paddle mixer is recommended for mixing the product. Topping applied at 6mm thickness over a scratch coat with Nitoflor SL 3000 UT/Tremco(flowcrete)/Sika or equivalent of 1mm to the designated area shall not be of slip resistant texture. The cured Polyurethane flooring shall exhibits the following minimum technical profiles and or as per relevant IS codes and standards of the make approved by GE :- Fire Resistance-Bfl-s(EN-13501-1) Slip Presistance :- Dry>40, Wet depends on specification (in accordance with (Method described in BS 7976-2 (typical values values for 4-5 rubber slider with HSE and UDSRG guidelines) Coefficient of Thermal Expansion :- 3.74x10.5oC (ASTM C-531) Abrasion Resistance :- 0.12g loss per 1000 cycles (ASTM D4060 (1 KG load using CS17 wheels). Compressive Strength :- >50N/mm2 (EN 13892-2) Impact Resistance :- 20Nm (EN ISO 6272) Flexural Strength :- 20 N/mm2 (EN 13892-2) Tensile Strength :- 10 N/mm2 (BS 6319) Water Permeability : Nil - Kasrsten test (Impermeable) Vapour Permeability :- 3g/m2/24 hrs. at 6mm thick (ASTM 96.90) Bound Strength :- Greater than cohesive strength of 25 N/mm2 concrete. >1.5MPs Temperature Tesistance : (Minus) -25o C to Plus (+) 100oC at 6mm thickness. Note for all Items : Resurfacing works of flooring shall be carried out as per manufacturer's instruction and work shall be got executed through authorised applicator of the manufacturer's only. A certifcate to this effect shall be obtained from the manufacturer about authorised applicator.