SPL REPAIRS/IMPROVEMENT TO WATER SUPPLY INSTALLATION / PUMP HOUSE, SEMI UG SUMPS,RING MAIN WATER CI/DI PIPE LINES WITH CONNECTED VALVES AT RED QTR AT CHAFB

M&L Making V groove of 10mm wide and 30mm deep or upto the extent of joint/crack present at site over joint/ crack line using electrically operated angle grinder with diamond concrete saw blade and cleaning it by air blower as directed by Engineer-ln-Charge. The groove shall be cut on the concrete surface along the joint/crack over RCC structure to be repaired complete all as specified and directed. Note: Work shall be executed by the authorized applicator of manufacturer only.

M&L for Drilling Holes of 12mm dia up to 100 mm deep holes in structural members at the interval of 300 mm in staggered manner or along the joint & crack line in Reinforced Concrete (RCC) structural element including cleaning of the holes by air blower and inserting 12mm dia nozzle compatible with injector and having machined external end to receive outlet of Grouting Gun. Fix inside the hole by applying thixotropic epoxy adhesive SikaDur 31 or equivalent to ensure complete sealing and allow curing the system for minimum of 8 Hrs before Grouting including nozzle projection. Excess putty, if any, over concrete element shall be cleaned by grinding, leveling and finishing the external surface, after completion of the work complete all as specified and directed. Note: Work shall be executed by the authorized applicator of manufacturer only.

M&LSealing of exposed 'V' groove of 10mm wide and 30mm deep with Sikaguard 694 F(l) or Quick Fix or equivalent solvent-free, moisture tolerant, thixotropic, two part structural adhesive and repair mortar cum surface levelling mortar complete all as specified and directed. Note: Work shall be executed by the authorized applicator of manufacturer only.

M&L for injection grouting of construction joints with non shrink cement slurry admixed with epoxy grouting Cebex 100 of M/S Fosroc Chemical /SikaGrout -214 IN @ 300 mm C/C including of opening of cracks to a groove of size 12mm X 12 mm, Nozzle at 300 mm C/C including of opening of cracks to be grooved of size 10mm X 10mm fixing of nozzles with fast setting plugging compound Renderoc plug, cutting the extra length of nozzle after grouting complete all as per manufacturer's instructions including necessary scaffolding as required and as per the directions of Engineer incharge complete all as specified and directed. Seal the nozzle with Sikagard 694 F(l) or equivalent thixotropic epoxy putty after the refusal of grout material from the nozzle. Note: Leakage through other nozzle or cracks are required to be monitored while grouting and such points to be sealed as and when required without any extra cost.Work shall be executed by the authorized applicator of manufacturer only.

M&L Providing & Applying Two coats of Aqua Arm Top Guard inside of the wall & floor of the tank, a two components ready to use polymer modified cementatious coating . First Coat should be applied horizontally and second coat should be applied vertically and the thickness of coating shall not be less than I .5 mm. complete all as specified and directed. Note: Work shall be executed by the authorized applicator of manufacturer only.

M&L Applying two coats Sikagard 67 or Aqua Arm Tank Coat, a water based epoxy coating certified for portable water on all over the concrete surface from inside. Apply the first coat by brush allow it to dry for 6-8 hrs and then apply 2nd coat and allow it to cure complete 24 hrs.The coating shall be applied using brush application. The Thickness after two coating should not be less than 500 microns complete all as specified and directed. Note: Work shall be executed by the authorized applicator of manufacturer only.

M&L Examining concrete by tapping with light hammer and marking of the loose concrete areas of structural elements in straight line geometrical forms, grooving the edges same with grinder upto 5 -10 mm depth without damaging existing rebars, carefully removing unsound weak/ loose concrete/ cover & concrete around the rebars upto 10 mm depth by low impact high frequency hammer/ chipper without damaging the sound concrete, daily cleaning and stacking of debris at prescribed location in polypropylene/ paper bags, disposing off the debris so generated on weekly basis outside the premises, etc, including necessary scaffolding complete all as specified and directed.

M&L for cleaning existing reinforcement with wire brush/rotary wire brush to make surface free from rust scales, loose material, dirt etc complete and applying two coats of alkaline rust converting primer Sika Rust Off 100 or ReArm Rust Remover with brush on the existing rebar for complete wetting of rusted metal surface and allowed to react it for 16-24 hours. After 24 hours, a white layer will appear which will protect further corrosion of metal / steel for about 5-7 days including surface preparation. Before applying protective coating, the surface should be wire brushed and thoroughly cleaned for dust with dry cloth, complete all as specified and as directed. Note: Work shall be executed by the authorised applicator of manufacturer only.

M&L for Drilling & Rebaring of 10 mm dia x 120mm deep, thoroughly coated with Zinc based reinforcement epoxy AquaArm CoatZP complete all as specified and as required.

M&L Providing and Application Aqua Arm Coat-Zp as passivator/ Anti corrosion coating to the steel reinforcement shall be applied The material shall be two component, cement based polymer modified two component coating for corrosion protection. The material shall be prepacked and ready to use. It shall be fully compatible with the reinstatement methods adopted complete all as specified and as directed. This shall include surface preparation and erection of steel porps as required for the application complete all as specified and directed. Note: Work shall be executed by the authorised applicator of manufacturer only.