Roof treatment at various buildings, Laitkor Grn

M&L for dismantling/taking down unserviceable cement plaster loose/unsound weaken cement concrete of any description and in any position from existing internal/External surfaces with power driven of pneumetic chisel and removal upto the approval municipal dumping ground outsides land complete all specified and directed by engineer-in-charge. , complete all as specified and directed by Engineer-in-Charge.

M&L for cleaning and removing all corrosion scales , rust , etc using emery / wire brush and finally cleaning using rust remover & cleaning agent that is one part alkaline based material, with corrosion inhibitors and dispersing agents and supplied as a clear brown solution. The specific gravity shall be 1.2 – 1.22 @ 25°C. The pH value shall be between 9.5 to 10. The coverage shall be 5 – 6 m2/ L, complete all specified and directed by Engineer-in-charge. Make : Thermax Ltd., Trimurti (India), Tikitar Danosa (Pvt) Ltd.

M&L for providing and crack sealing cementitious material in powder form. It is easy to apply and can be finished or smoothened off with a putty blade or a damp sponge. It sets quickly on application and can be over coated with common paints / coatings, white coloured with setting time of 15min and Compressive strength as per ASTM C 109 of 22N in 7 days. Mixing Ratio to 1: 2.5 (Water: Powder) Cutting groove of less than 6mm X 6mm. complete all as specified and directed by Engr-in-Charge. Make : Thermax Ltd., Trimurti (India), Tikitar Danosa (Pvt) Ltd.

M&L for repair to damaged existing surfaces of upto 15 m height from plinth level by structural strengthening using epoxy injection grouting Complete all as specified and as directed by Enginer-in-charge and as under :- (a).High strength epoxy resin based Injection, Automatic NRV packers from all access side Distance of injections will be 500 m c/c in matrix pattern until column is submerged in dampness of chemical etc (b) injection grouting using two component grouting polymer having low viscosity, high molecular weight, thermosetting to reach very deep pores, voids, cracks and honeycomb in the concrete, specific gravity of which shall be 0.95, pH of 2-4,viscosity of 20-25 sec by B/4 ford cup and having curing time of 30-90 minutes area by suitable gun/pump at required pressure (100 bar to 150 Bar, including cutting of nipples after curing etc and sealing the nozzles with Epoxy FIller and preparing the surface to match with the existing surfaces all as directe, complete all specified and directed by Engineer-in-charge. Make : Thermax Ltd., Trimurti (India), Tikitar Danosa (Pvt) Ltd.

M&L for providing and fixing welded MS wire mesh weighing not less than 1 kg/sqm on the prepared surface which should be cleaned and should be removed from dirt, fungus and all foreign material.complete all as specified and directed by Engineer-in-Charge.

M&L for applying two coats of amine cured epoxy coating for steel reinforcement having Mixed density of 2.01-2.05, Adhesive bond strength - 1N/mm², touch drying time of 10-15 minutes at 35 Degree Cand recoatable time 30 minutes. Coating to be applied in two coats @ 1-2mm thickness in two coats, coverage @ 2 Kg/sqm for 1 mm thickness, after proper surface preparation, cleaning & removing rust completely etc. complete all as specified and directed by Engineer-in-Charge. Make : Thermax Ltd., Trimurti (India), Tikitar Danosa (Pvt) Ltd.

M&L for applying, elastoplastic Coating modified with special additives and ready to use.It should complies to ASTM D4541 ASTM C836, DIN 1048p 5 ASTC D412 having shore hardness D-scale-20 Non volatile,low temperature feasibility test, tensile strength > 0.4 MPa, Elongation >20% , this membrane shall have a minimum pot life of 40 mins Mixed with water, it cures forming a coating, with limited thickness which resists the penetration of water to achieve compressive strength of 36 N/mm in 3 days, adhesion bond strength of 8.2 N/mm Coating to be applied after proper surface preparation to remove loose dust, Cleaning, Mixing using slow speed electric drill and application of 2 coats. complete all specified and directed by Engineer-in-charge. Make : Thermax Ltd., Trimurti (India), Tikitar Danosa (Pvt) Ltd.

M & L for providing and applying a layer of high solids resin based pigmented concrete compound (application 4.00 to 5.00Sqm/lit). It forms a continuous membrane that controls hydration for strong and durable concrete .It should have specific gravity of 1.02. It can be applied by brush or can be sprayed, If sprayed the nozzle of the spray should be held approximately 450mm from the concrete surface and should be passed back and forth to ensure complete and even coverage. The pump pressure should be maintained at a level to produce a fine spray ensuring complete coverage of the surface, complete all specified and directed by Engineer-in-charge. Make : Thermax Ltd., Trimurti (India), Tikitar Danosa (Pvt) Ltd.

M&L for providing and applying a blend of Portland cement, graded fillers and chemical additives which impart controlled expansion, should be ready to use and can fill convoluted voids, componsates shrikage at both plastic and Hardened states. Minimum thickness to be used is 50mm with addition of 10mm down aggregates of 25% of the weight of ready to use powder with W/P ratio of 0.18. Strength of 1 day to be 20N/mm2. Time of expansion to start after 20min of mixing and finish in 120 min of mixing. Epoxy bonding agent having mix density of 1.45 to 1.5 kg/ltr, compressive strength (BS-6319 PT 3)-25 Mpa at 7 days bond strength (ASTM C 881)-11 N/mm2 at 7 days, having an over lay time of 3 hrs at 30°C pouring of ready mixture into the formwork using suitable arrangement or if required using pumping device for and the bottom shuttering after 7 days ensuring proper bond between the poured mixture and existing concrete substrate etc including all tools and tackles as per accepting officer, complete all as specified and directed by Engr-in-Charge. Make : Thermax Ltd., Trimurti (India), Tikitar Danosa (Pvt) Ltd.

M&L for applying 25 mm mm screed with one component fibre reinforced PMM with water producing thixotropic consistency using heavy-duty slow speed drill or with spiral mixing paddle or a Pan type mixer where ambient temperature if 30°C or more use of chilled water for conditioning the bagged product in an air-conditioned store prior to use. Mixing temperature shall be between 5 and 40°C. Mixed material shall achieve compressive strength of 15 MPa in 1 day & 45 MPa in 28 days and a flexural strength of 7 MPa @ 7 days.cement and sand can be used for finishing purpose. It shall compensate both plastic and hardened shrinkage and have minimum direct adhesive bond strength of greater than 2 MPa. It shall be alkaline, compatible with host concrete with similar thermal properties and shall achieve a elastic modulus of minimum 25 kN/Sqmm.,complete all specified and directed by engineer-in-charge Make : Thermax Ltd., Trimurti (India), Tikitar Danosa (Pvt) Ltd.

M&L for applying two coats of water based copolymer emulsion, formulated to achieve specific performance characteristics. It should have Excellent adhesion to concrete & cementious surfaces, Excellent water retention after film formation, Excellent penetration into the substrate there by providing the best adhesion. Substrate should have sufficient strength to receive the top coating. Any defects in the substrate like surface undulations, cracks, pin holes etc., should be rectified/filled before starting application.It should have specific gravity between 1.00± 0.02, Touch Dry @ 30 C -1 -2 hours. complete all specified and directed by Engineer-in-charge. Make : Thermax Ltd., Trimurti (India), Tikitar Danosa (Pvt) Ltd.

M&L for protecting and plastering of waterproofed surface Using cement based, micro- silica restoration mortar.The product needing only addition of water at site which can be applied by trowel.cement, sand can be used for finishing purpose. It is reinforced with specially designed bean shaped, alkali resistant synthetic fibers for exceptional resistance to cracking. It is recommended for repair situations requiring application of mortar up to 10 mm thickness in one layer.The product shall achieve a compressive strength of 11 MPa in 1 day & 30 MPa in 28 days and a minimum flexural strength of 6 MPa @ 7 days. It shall have a tensile strength of minimum 2 MPa. It shall have a minimum bond strength of 2 MPa, complete all specified and directed by Engineer-in-charge. Make : Thermax Ltd., Trimurti (India), Tikitar Danosa (Pvt) Ltd.

M&L for drilling hole chemical anchoring of reinforcement on existing columns/chajja/beams with Hilti HIT-HY 70 , minimum hole depth 100mm, steel bar 12mm dia and drill bit dia 14mm, complete all as specified and directed by Engineer-in-Charge. Make : Thermax Ltd, Trimurti (India), Tiki tar Danosa (Pvt) Ltd

M&L for applying two coat of two component amine cured solvent free apoxy resin based epoxy mastic coating (application 2.00 to 2.50 Sqm/lit) using Light brush blasting using nonmetallic abrasive leaving a clean, rough and even pattern.it should be based on a 100% epoxy formulation and contains no solvents or water diluents. Apply two coats with brush or squeeze to the existing surface, working well into the substrate.it should achieve Compressive Strength of >70 MPa after 14 days, having pot life, minutes at 27⁰C, 100 g >40 mass, complete all specified and directed by Engineer-in-charge. Make : Thermax Ltd., Trimurti (India), Tikitar Danosa (Pvt) Ltd.

M&L for providing and applying two coats of water based Aliphatic acrylate -Anti-Carbonation coating for concrete surfaces over a coat of acrylic polymer primer. The coating to be applied on surface shall be liquid applied highly durable waterproof coating system for surface , based on high quality acrylic emulsion, functional filler, sunlight stable pigment and quality fungicides. It shall have properties that provide features like crack bridging ability, breathability, flexibility & exterior durability and resists micro-organism growth.It shall cover hairline cracks up to 0.5 mm effectively. It shall have excellent crack bridging ability and shall bridge cracks up to 2 mm width. The elongation at break is approx. 220 %. The tensile strength is 0.7 Mpa. It has a hardness shore ‘A’ scale of 80, with an adhesion strength of 3.4 Mpa. The coating is UV resistant, algae and fungus resistant, and has a water vapor permeability of 40 gm/m²/day and a crack bridging ability of 1-2 mm. The coating must be applied with temperature above 5°C and below 45°C. The coating shall be applied in two coats of by roller or brush application at the interval of 4-6 hours.Allow applied coating to dry or cure for 7 days , complete all specified and directed by Engineer-in-charge. Make : Thermax Ltd., Trimurti (India), Tikitar Danosa (Pvt) Ltd.

M&L for MS TMT bars 8mm dia and over as in reinforcement cut to length, bent to shape required including cranking bending spirally for hooping for columns, hooking ends & binding with and including MS annealed wire not less than 0.9mm dia complete all as specified and directed by the Engineer-in-Charge

M&L for form work to sides and soffits of lintels, beams, columns, shelves, chajjas including overhangs etc for fair finished flat surface, complete all as specified and directed by Engr-in-charge

M&L for treating the existing pipe penetrations using non-shrink, free flowing, cementitious grout. The compressive strength of the grout must exceed 50 N/mm2 at 7 days and 60 N/mm2 at 28 days. The flexural strength of grout must exceed 9 N/mm 2 @ 28 days. Fresh wet density of the mixed grout must exceed 2150 Kg /m3. Further flashing the area using solvent based UV resistant polyurethane based water proofing material having minimum tensile strength on 4 N/mm2 and minimum elongation of 800%, complete all as specified and directed. Make : Thermax Ltd., Trimurti (India), Tikitar Danosa (Pvt) Ltd.

M&L for applying two coats of waterproofing and protective coating on walls, floors and ceiling etc. The non-toxic waterproofing system should have multiple corrosion inhibiting synergies with. and should comply with ASTM D4541, ASTM C836, DIN 1048p 5, ASTC D412 having Hardness - Shore 'D' scale of 20,wet density of 1.66 g/cc, flexibility at low temperatures, tensile strength > 0.4 MPa, Elongation > 20%, adhesion to substrate greater than 1.5 N/mm², waterproofing to withstand 330 KPa positive pressure and 160 KPa negative pressure, having crack bridging properties upto 1mm. Make : Thermax Ltd., Trimurti (India), Tikitar Danosa (Pvt) Ltd.

M&L for treatment of crack in concrete by injection grouting using two component grouting polymer having low viscosity, high molecular weight, thermosetting to reach very deep pores, voids, cracks and honeycomb in the concrete, specific gravity of which shall be 0.95, pH of 2-4, viscosity of 20-25 sec by B/4 ford cup and having curing time of 30-90 minutes at locations as directed by Engineer-in-charge. Make : Thermax Ltd., Trimurti (India), Tikitar Danosa (Pvt) Ltd.

M&L for providing and applying two coats of anti-yellowing coating, The coating to be applied on wall shall be liquid applied highly durable waterproof coating system for wall, based on high quality acrylic emulsion, functional filler, sunlight stable pigment and quality fungicides. It shall have properties that provide features like crack bridging ability, breathability, flexibility & exterior durability and resists micro-organism growth.It shall cover hairline cracks up to 0.5 mm effectively. It shall have excellent crack bridging ability and shall bridge cracks up to 2 mm width. The elongation at break is approx. 220 %. The tensile strength is 0.7 Mpa. It has a hardness shore ‘A’ scale of 80, with an adhesion strength of 3.4 Mpa. The coating is UV resistant, algae and fungus resistant, and has a water vapor permeability of 40 gm/m²/day and a crack bridging ability of 1-2 mm. The coating must be applied with temperature above 5°C and below 45°C. The coating shall be applied in two coats of by roller or brush application at the interval of 4-6 hours.Allow applied coating to dry or cure for 7 days complete all as specified and directed Make : Thermax Ltd., Trimurti (India), Tikitar Danosa (Pvt) Ltd.

M&L for applying Polyster Resin based Anchoring material in concrete before fixing nozzle it should typically attains a compressive strength in excess of 20N/mm @ 3 hours and and ultimate compressive strength of 70N/mm in 7 days (50mm x 50mm x 50mm)when tested as per BS 6319 Part 2 : 1983. complete all as specified and directed by Engr-in-charge. Make : Thermax Ltd., Trimurti (India), Tikitar Danosa (Pvt) Ltd.

M & L for providing and applying a layer of high solids resin based pigmented concrete compound (application 4.00 to 5.00Sqm/lit). It forms a continuous membrane that controls hydration for strong and durable concrete .It should have specific gravity of 1.02. It can be applied by brush or can be sprayed, If sprayed the nozzle of the spray should be held approximately 450mm from the concrete surface and should be passed back and forth to ensure complete and even coverage. The pump pressure should be maintained at a level to produce a fine spray ensuring complete coverage of the surface, complete all specified and directed by Engineer-in-charge. Make : Thermax Ltd., Trimurti (India), Tikitar Danosa (Pvt) Ltd.

neeraj construction company (BID ID -3106632)