Water Resources Department Tender

Grouting Packers Placement & Removal : - Drilling and fixing injection packers in RCC members including, drilling 14 mm Ø holes in structural members at the intervals as per site conditions, clean the holes by air blower prior to fixing nozzles, insert 12 mm dia., minimum 75-100 mm long injection packers in cleaned holes with moisture insensitive epoxy resin based putty grouting, the packers approved material using suitable grouting pump under 3 - 5 Kg/cm2 pressure as per site requirement & cutting the packers by mechanical means after completion of grouting work without damaging structural elements i/c dewatering and pumping of working area including all connected operation of laying of pipe line, removal of all seepage and other operations required for maintaining cleanliness including cost of material and labour and all scaffolding, equipment, tools & tackles i/c all lead & lift of all materials & equipment etc. complete in all respect and as directed by Engineer-in-charge.

Grouting :- Supply & application of two part, low viscosity,moisture insensitive epoxy resin based injection grout. The product should be suitable to seal damp, wet and submerged cracks; having mixed density of ῀1.1kg/litre, Compressive strength of40 N/mm2 at 1 Day & 75 N/mm2 at 14 Days, 30 Deg C as per ASTM C - 579, Tensile strength of 40N/mm2 at 14 Days as per ISO 527, Bond Strength of 10 N/mm2 (failure in concrete) according to ASTM C - 882 i/c dewatering and pumping of working area including all connected operations of laying of pipe line, removal of all seepage and other operations required for maintaining cleanliness i/c cost of all materials and labour, transportation, scaffolding, equipment, tools & tackles i/c all lead & lift of all materials & equipment etc. complete in all respect and as directed by Engineer-in-charge.

Dismantling: Chiseling thoroughly damaged R.C.C. member of teeth & cleaning by sand blasting & washing the surface using air/water pressure jet, making the surface dry, i/c dewatering and pumping of working area including all connected operations of laying of pipe line, removal of all seepage and other operations required for maintaining cleanliness i/c cost of all materials, & labour and equipment, scaffoding with all lead & lift of all materials & equipment etc. complete in all respect and as directed by Engineer in-charge.

Repair of concrete :- Providing and applying 20mm to 100mm VHS a non-shrink, cementitious precision grout powered by ViscoCrete technology and designed to achieve high early strength and exceptional ultimate strengths at a fluid consistency. The grout should be non metallic and contains no chlorides, comply with ASTM C-1107. The grout should have following physical properties: Compressive Strength at ambient temperature of +300C according to ASTM 1107 in 1 day ῀ 40 N/mm2, in 3 days ῀ 60 N/mm2, in 7 days ῀ 70 N/mm2, and in 28 days῀ 85 N/mm2; Flexural Strength at ambient temperature of +300C according to ASTM C 293 in 7 days ῀ 10 N/mm² and in 28 days ῀12N/mm²; Bond strength should be minimum 10N/mm2 at water: powder ratio 0.12 at 0.025 mm slip at 28 days; E-Modulus ῀ 37000 N/mm2. Adding of 6mm aggregates will be permitted in the proportion of grout: aggregates = 2:1 (by weight) only as per manufacturers recommendation without compromising the strength. The rate shall include cost of all materials and labour charges for mixing,pouring, cost of tools, and equipment i/c dewatering and pumping of working area including all connected operations of laying of pipe line, removal of all seepage and other operations required for maintaining cleanliness and all lead & lift of materials, and all equipment & scaffolding, transportiation etc., to carry out the complete work, complete with all respect and as directed by Engineer-in-charge.

Bond coat :- Providing, mixing & applying two component epoxy resin concrete bonding coat on prepared RCC surfaces as per manufacture specification including prepartaion of surface by sand blasting/air blower /shoft brushes/ chipping and throughly cleaning of surface complete whereever required and as per directions of Engineer-in charge with consumption of 0.4 kg/m2. The product should comply with ASTM C-881, Type -II, Grade 2, Class B+C and Bond strength should be 10 MPa i/c dewatering and pumping of working area including all connected operations of laying of pipe line, removal of all seepage and other operations required for maintaining cleanliness i/c cost of all materials & labour & equipment and all scaffolding with all lead & lift of all materials and equipment etc. complete in all respect and as directed by Engineer-in-charge.

Resurfacing :- Providing and applying 5mm. thick solvent-free, three component thixotropic epoxy mortar based on a combination of epoxy resin and selected quartz aggregates on glacis, bucket, teeth, syphone portion, wall surface of dam including preparation of old surface of concrete after a lapse of three months or more for laying fresh epoxy mortar surface cleaning by chiseling, sand blasting, etc. complete. The manufacturer must be an ISO 9001 & 14001 certified and valid certificates must be produced as proof. The resin system (resin & hardener) should be tested in accordance with ASTM, C881, Type I& IV, Grade 1, Class C specifications except for gel time, should have a mixed density of Neat Resin: 1.1 ± 0.05 kg/l and for Mortar(1:5): 1.96 ± 0.1 kg/l at +27°C, should have heat deflection temperature (HDT) of 50°C in (7 days) at +25°C according to ASTM D-648. The material should exhibit following physical properties: 1. Compressive Strength for neat resin/Mortar (1:5) according to ASTM D 695 at 25oC in (1 day) should be 70 N/mm2/65 N/mm2, in (3 days) should be 75 N/mm2/70 N/mm2, in (7 days) should be 80 N/mm2/75 N/mm2, in (14 days) should be 85 N/mm2/80 N/mm2 and in (28 days) should be 90 N/mm2/85 N/mm2. 2. Tensile Strength according to ASTM D 638 at +25°C in (7 days) for neat resin/Mortar (1:5) should be50 N/mm2/15 N/mm2 respectively. 3. Tensile Elongation in % according to ASTM D 638 at +25°C in (7 days) for neat resin/Mortar (1:5) should be 2/0.3 respectively. 4. Water absorption according to ASTM D 570 for Neat resin/Mortar (1: 5) under water immersion for 24 hours after 7days cure should be 0.25% & 0.56% respectively. Consumption /Yield : Primer (Part A + Part B): consumption is 0.1 - 0.2 kg/m2, Mortar (Part A+B+C): Consumption is 2.2 kg/m2 per mm of thickness. All three components pack (resin, hardner & filler) sould to be factory made and sourced from same manufacturer. i/c dewatering and pumping of working area including all connected operations of laying of pipe line, removal of all seepage and other operations required for maintaining cleanliness and rates are including cost of all material and labour and equipment, arrangments of all scaffolding, i/c all leads and all lifts of all materials and equipment including curing, finishing and other operation required for maintaing cleanliness of construction etc. complete in all respect and as directed by the Engineer in Charge.

Top coat :- UV Resistant top coat :- Provision & application of waterborne modified Polyurethane dispersion based, an ultra violet resistant, food grade (USFDA 175.300) based surface coating, shall have a specified mixed density of ῀1.3kg/liter 27 degree C. Solid content of ῀57% by weight, viscosity 2230cps, elongation at break100% as per (ISO 527-3), Tensile strength῀1.5 MPa as per (ISO 527-3),Tensile adhesion strength 1.5 MPa (Concrete) (according to EN 1542), water vapour transimission ῀ 32 g/sqm/24h(ASTM E 96 : 2000), layer thickness DFT῀100-110 micron (Two coat) having coverage of ῀ 0.15 kg/sqm per coat in 2 coats applied either by spray or roller or as recommended by the manufacturer and chemical action; weather proof i/c dewatering and pumping of working area including all connected operations of laying of pipe line, removal of all seepage and other operations required for maintaining cleanliness and i/c cost of all materials and labour & equipment, all scaffolding with all lead & lift of all materials and equipment etc. complete in all respect and as directed by Engineer-in-charge.

Pointing:- Raking out the horizontal and vertical joints of R R masonry in the outer face of the wall to remove all the loose and hard pointing using hand grinding machine with diamond wheel, chipper (manual/and or mchanical means) at a depth of 2 times width providing and filling the pointing mortar in the horizontal and vertical joints of R R masonry in outer surface of the walls to a depth of 2 times width by applying a priming coat with epoxy bonding agent inside the joints with a brush and filling properly these joints with " dual shrinkage controlled - non shrink, fibre reinforced, UV resistant, thixotropic polymer modified cementitious, high performance cementitious repair mortar.The minimum desired porperties of the polymer modified mortar material are enlisted below: i) Compressive strength 50N/mm2 in 28 days as per ASTM C-109,70mmCube ii) Flexural strength of min 9 N/mm2 in 28 days as per EN 196 -1 iii) Bond strength 10 N/mm2 as per ASTM C-882 V)Bond strength with fresh cement mortar with primer at interface 1.5N/mm2 vi) Bond strength with rock with primer at interface 1.5 N/mm2 vii) Modulus of Elasticity (x105) 3kg/cm2 viii) Water absorption less than 2% ix) Abrasion resistance:0.42 to 0.44 gm/cm2 x) Rapid chloride permeability 1800 columbs xi) Permeability (k) : 10-12 m/s xii)UV resistant: Certification by ARAI xiii) Non Toxic: Certification by NTC xiv) Porosity: 1% i/c cost of all materials and labour and equipment, all scaffolding with all lead & lift of all materials & equipment etc. complete in all respect and as directed by Engineer-in-charge .