Pipeline rehabilitation works on 3200 mm Dia RC Pipeline using chemical compounds on targeted location between chainages 13.50 km to Teela Morh under 270 cusec Delhi Water Supply Maintenanace Scheme

Treatment of Joints

Dewatering from ditches, pits and trenches around 3200 mm Dia RC pipeline including hiring of pump set of. diesel operator etc. complete & suction pipe & delivery etc. complete.

Cleaning of Joints including removing of baker rod if any), filling and all other loose materials from the expansion joint and clean the surface around the joint to make it free from loose particles, dirt oil, grease etc and disposal of malba debris outside of pipeline including all labour T&P etc complete

Drilling and fixing injection packers in RC members including, Drilling Holes: Drilling holes in structural members at intervals as per the recommendation of the engineer in charge. Cleaning of holes: Clean the holes with air blower before fixing nozzles. Fixing of Packers: Insert 12 mm dia., 50~75 mm long injection packers in cleaned holes with moisture-insensitive epoxy resin-based putty or equivalent. Cutting of Packers: Cut the Packers by wheel after grouting completion without damaging structural elements. Patching Hole:- After cutting off the packer we patch the hole on epoxy putty

Supply and application of single component, Polyurethane Injection foam based system for wet conditions and temporary sealing, which cures to a dense flexible foam with a fine cellular structure. Minimum Product Requirements: Viscosity cps 500-1300 at 23°C

Supply and application of 2 components, elastic, low viscous, solvent-free, Polyurethane Injection resin based system for permanent sealing, that does not need the presence of water for hardening reaction Product Requirements: The viscosity of the mixture < 100 mPa*s (at +20°C) Capable of penetrating cracks>0.2mm wide with a CE Marking (European Conformity) -> Conformance label that the product is approved to the essential requirements and under market surveillance

Epoxy Grouting Fosroc (EP10) sealing of crack/porous concrete in Reinforced Cement Concrete Structure by injection process through nipples grouting complete as per Technical Specifications.

Repairing the edges of the joint (in case of weak concrete at the joint edge) and also configuring the joint width (in case of expansion joints with irregular width more than the width of the chosen Sikadur Combiflex Tape width) with epoxy repair mortar Sikadur 31 and Sikadur 41/ Sika Latex or its equivalent.

Filling the joints with Rubber compression seal for expansion joints of size next higher to the joint gap and apply Polysulphide sealant in the expension joint up to a depth equal to not less than 1/2 the width of the joint including insert bitumen impregnated board as filling material,T&P etc. complete.

Providing and applying the base coat of epoxy adhesive on both sides of the joint as per the width of the Sikadur Combiflex SG Tape. Product: Sikadur-Combiflex® Adhesive or its equivalent Consumption: 1.4 kg/m (strip width 200 mm) Product requirements: mixed density: 1.60kg/ltr; bond strength > 2 N/mm2.