Rehabilitation of Vettaikaranputhur canal sluice well at Aliyar Dam in Anaimalai Taluk of Coimbatore District

Amount

CEMENT GROUTING: The work involves treating the internal cavities of Course Rubble (CR) / Random Rubble (RR) masonry by means of pressure injection grouting. The grout mixture shall be prepared using cement and water, blended with the following additives to enhance performance:Styrene Butadiene Rubber (SBR): 1 litre per bag of cement, to improve adhesion, flexibility, and water resistance. Plasticized Expanding Grout Admixture (TOP FLOWCRETE or equivalent): 225 g per bag of cement, to impart controlled expansion and ensure complete filling of voids without shrinkage. For the grouting process, PVC nozzles of 16 mm diameter shall be fixed into the masonry to a depth of up to 500 mm, as required by site conditions. Grout shall then be injected through these nozzles using a grouting pump operating at a pressure of about 40 psi, ensuring that the internal cavities are completely filled and consolidated.The rate shall include Cost of all required materials including cement, water, SBR admixture, and expanding grout admixture, Hire and operation charges of necessary tools, plants, and equipment including grouting pump and accessories, Fixing, maintenance, and removal of PVC nozzles after grouting, Provision of scaffolding, staging, and safety arrangements for working on the dam face, Collection, removal, and disposal of debris, with stacking outside the submergence periphery of the reservoir, complete as per the direction of the departmental officers.

INJECTION GROUTING AT INNER SIDE SLUICE WALL: The work involves supply and application of low viscosity injection grouting to seal cracks, joints, or cavities in the sluice wall of the dam. The injection shall be carried out using TOP ACRYLIC GEL or equivalent, a four-component, special hydrophilic resin system with very low viscosity and adjustable reaction time, ensuring effective penetration and sealing even in fine cracks and porous masonry.The process shall include the following:Drilling of holes in the designated areas and fixing of suitable injection packers / nozzles,The resin system (TOP ACRYLIC GEL or equivalent) shall be prepared and mixed strictly as per manufacturer’s recommendations. Quick-fix products, wherever required, shall be used to ensure proper sealing around nozzles prior to injection, Injection shall be carried out using a double-component pneumatically operated injection pump capable of delivering resin at variable pressures, as required by site conditions and as directed by the Engineer-in-Charge. Injection shall be performed at a steady pressure as recommended by the manufacturer to ensure complete penetration into the cracks/cavities, An injection gun or grouting pump with suitable accessories shall be used for applying the high-strength injection resin under controlled pressure. Compressed air support may be used through the nozzles wherever required to aid penetration,The rate shall include Cost of all materials, including TOP ACRYLIC GEL (or approved equivalent resin), quick-fix products, injection packers, and consumables. Hire and operation charges of all equipment including pneumatically operated double-component injection pump, compressors, drills, and accessories. All preparatory works such as drilling, fixing of packers, sealing around nozzles, and cleaning of work areas.Provision of scaffolding, staging, and other arrangements required for safe working conditions.Safety arrangements, including providing all necessary Personal Protective Equipment (PPEs) to the workers and staff involved.All incidental works including removal and disposal of debris and ensuring site is left in clean condition after completion, complete as per the direction of the departmental officers.

RISED POINTING OF MASONRY JOINTS- EXTERNAL SURFACE: The work involves providing polymer-modified repair mortar for filling masonry joints to a depth of 50 mm on the external surface of the dam/masonry structure. The Work involves the masonry shall be shaped into a proper “T-joint” profile to ensure effective filling and bonding. Apply a priming coat of two-component, solvent-free epoxy-based bonding agent (such as Confix India or equivalent) inside the prepared joints with a brush.The bonding agent shall conform to the following properties:Bond strength: > 10 MPa, Viscosity: > 20 poise,Filling with Repair Mortar, Fill the prepared and primed joints with polymer-modified repair mortar (TOP CRETE 80 of Confix India or equivalent).The mortar shall be a single-component product mixed with water at a water–powder ratio of 0.11. The mortar shall be applied carefully to achieve full compaction and continuity in the joints, free of voids.After filling, cure the repair mortar using an approved curing compound to ensure proper hydration and strength gain. Performance Requirements of Repair Mortar: Drying shrinkage: < 300 micro strain (ASTM C 157-93),Compressive strength: > 45 MPa,Bond strength: > 2.1 MPa,Chloride ion content: < 0.03%,Elastic modulus: > 37 GPa, Flexural strength: > 10 MPa (BS 4551), Conforming to: BS EN 1504-03, Class R4,Rate to Includes Cost of all materials including bonding agent, repair mortar, water, and curing compound. Hire and operation charges of required tools, plants, and equipment, Provision of scaffolding, hanging platforms, pulley arrangements, and other access/safety facilities. Labour charges and all incidental works required for completing the work in accordance with specifications. etc complete as per the direction of the departmental officers.

FLUSH POINTING OF MASONRY JOINTS -INTERNAL SIDE : The work consists of providing polymer-modified repair mortar for filling masonry joints to a depth of 30 mm or beyond wherever required on the internal face of the dam/masonry structure. The joints shall be finished to a flush profile with the masonry surface, ensuring a uniform and smooth finish. After the joints are properly dried, apply a priming coat using a two-component, solvent-free epoxy-based bonding agent (M/s. Confix India or equivalent). The bonding agent shall be applied inside the prepared joints with a brush and shall meet the following properties:Bond strength: > 10 MPa, Viscosity: > 20 poise, Filling with Repair Mortar, The prepared joints shall then be filled with highly abrasion-resistant, non-shrink, fibre-reinforced, thixotropic repair mortar (Top Crete 80 of M/s. Confix India or equivalent).The mortar shall be a three-component system, mixed in the proportion of liquid : liquid : filler = 2.5 : 0.83 : 16.67 by weight. The mortar shall be carefully placed and finished flush with the masonry surface to achieve a dense, compact, and durable joint filling.After placement, the mortar shall be cured with an approved curing compound to ensure proper hydration and strength development. Performance Requirements of Repair Mortar:Non-shrink, fibre-reinforced, and thixotropic in nature for vertical/overhead application.Hire and operation charges of necessary equipment, tools, and plants.Provision of scaffolding, pulley arrangements, hanging platforms, and all necessary safety arrangements.Labour charges and all incidental works required for proper completion of the work as per specification.The entire work shall be executed in accordance with manufacturer’s specifications t, etc complete as per the direction of the departmental officers.

PROTECTIVE COATING WORKS OVER POINTING WORKS: The work consists of providing and applying a two-component, highly flexible, cementitious elastomeric waterproofing coating over the completed pointing works on the masonry surface.The Scope of Work involves:The surface shall be thoroughly cleaned by high pressure water jet to remove dust, laitance, and any loose particles in order to prepare the area for waterproofing treatment.Ensure that the surface is sound, free from oil, grease, and other contaminants. The mortar shall be applied in required profiles, cured, and allowed to dry completely before proceeding to the next stage. After proper surface preparation and curing of fillets, apply the two-component, highly flexible cementitious elastomeric waterproofing system (Top Seal 100 of M/s. Confix India or equivalent). The coating shall be applied in a uniform thickness of 1.1 mm, with a coverage rate of approximately 2.0 kg/sq.m. Application shall be carried out in two coats (or as per manufacturer’s recommendation) using brush, roller, or spray method, ensuring complete coverage and uniform finish. Material Properties (Waterproofing Coating):Elongation at break: > 150%, Density: 1940 kg/m³,Application temperature range: +5°C to +30°C, The rate to include Cost of all materials including waterproofing coating, polymer-modified mortar, water, and consumables.Hire charges of all required tools, plants, and equipment for grinding, mixing, and application. Provision of scaffolding, staging, and all necessary safety arrangements for working at heights. Labour charges for complete execution of the work, including preparation, mortar fillets, application, and curing. The rate is considered per sqm by coating area over the pointing mortar, which is calculated as: 6.5m/sqm × 0.05m = 0.325 sq.m per 1 sq.m of RR masonry

SURFACE PREPARATION OF CONCRETE SURFACE: The work shall consist of cleaning and removing all deteriorated or eroded portions of the existing concrete surface using a high-pressure water jet of up to 300 bar pressure. The water jetting shall ensure complete removal of all loose particles, laitance, dirt, dust, oil, grease, algae, and any weak or unsound material adhering to the surface. The process shall also create a sufficiently rough and profiled surface to achieve excellent bonding with the subsequently applied repair mortar. All surfaces shall be thoroughly washed and prepared in a uniform manner to expose a sound substrate free from contaminants. The preparation work shall include making necessary arrangements such as scaffolding, working platforms, electricity supply, and all required tools, tackles, and safety measures.The cost of the item shall include labor charges, hire charges for equipment, materials for staging, and all other incidental expenses required to complete the work by the standard specifications and as directed by the departmental officers.

HIGH ABRASION RESISTANT COATING: The work involves providing and applying a high abrasion-resistant protective coating of 15 mm thickness on the prepared masonry/concrete surface.The Scope of Work involves the surface shall be thoroughly cleaned using a high-pressure water jet to remove dust, laitance, weak particles, and contaminants. Ensure that the surface is sound, free from grease, oil, and loosely bound material. Application of High Abrasion Resistant Coating. After cleaning, apply a ready-to-use, pre-packed, single-component, polymer-modified, fibre-reinforced, high-abrasion-resistant polymeric mortar (M/s. Confix India or equivalent).The material shall be applied to a uniform thickness of 15 mm by one of the following methods: Spray application using wet or dry GUNMIX technology, or Manual application by hand trowelling, as per site requirements. Material Properties (Repair Mortar / Coating): Compressive Strength:43.5 N/mm² at 7 days , 57.3 N/mm² at 28 days, Dynamic Elastic Modulus: 27,500 N/mm², Water Penetration: Less than 1 mm at 5 bar pressure (EN 12390-8), Abrasion Resistance: Grade A6 (EN 13813), Chemical Resistance: Very high sulphate and chloride resistance; resistant to environments with pH range from 14 down to 3.3. Durability: Impermeable to water, resistant to continuous water exposure, yet open to water vapour diffusion. Standards Compliance: Class R4 according to EN 1504, Part 3. Finishing and Curing: The finished surface shall be dense, smooth, and free from voids or honeycombing. Curing shall be carried out strictly as per manufacturer’s recommendations to ensure strength and durability. Rate to Include: Cost of all materials including high abrasion resistant mortar and consumables.Hire charges of all required tools, tackles, spraying equipment, mixing equipment, and accessories. Provision of scaffolding, working platforms, and safety arrangements. Labour charges for surface preparation, application, finishing, and curing. All incidental works necessary to complete the coating in all respects as directed by the Departmental Officers.

SURFACE HARDNER COATING: This item consists of supplying and applying a two-component, water-based epoxy resin (of Confix India make or an approved equivalent) over the hardened coating surface to enhance the mechanical strength and chemical resistance of the substrate and pointing materials.The epoxy system shall have the following properties:Density: 1.05 kg/dm³,Viscosity: 250 mPa•s,Application Time: 45 to 60 minutes,Full Chemical & Mechanical Resistance: Achieved after 7 days of curing, Coverage: Approximately 250 g/m² per coat, The coating shall be applied uniformly by brush, roller, or spray, ensuring complete and even coverage without streaks, pinholes, or missed areas. Surface preparation must be carried out prior to application to ensure that the surface is sound, clean, and free from dust, grease, and loose particles.The cost of the work includes Supply of epoxy resin and hardener components Mixing, handling, and application of the coating Tools, tackles, scaffolding, and working platforms, Labor charges and all incidental expenses. The work shall be carried out in accordance with standard specifications, and as directed by the departmental officers.

stanely hitech construction company private limited (BID ID -1457806)