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25 results • Latest
Provision of Fire Retardant Coating Powder to the EB Panel Boards, PDB Boxes and LDB Boxes of various substation at Rajiv Gandhi Government General Hospital, Chennai-3
Charges include the supply and application of fire-retardant cable coating for HV, MV, or LV electrical cables in the 11 kV Sub-Station. The coating shall be a latex-based/water-based intumescent formulation, designed to prevent flame propagation along single or grouped electrical and communication cables. Compliant with IEEE 383, IEEE 1202, IEC 60332-3, and BS 476 standards, the coating forms a carbonaceous barrier when exposed to heat, effectively restricting both horizontal and vertical flame spread and ensuring up to 2-hour circuit integrity. It shall be compatible with new or existing cable installations and ideal for critical power and communication systems, including cable trays and vertical risers. The paint shall be thixotropic for high-build application, with high solids for better coverage, non-halogenated, flexible, auto-bonding, water and weather resistant, and low abrasion to ensure longer pump life and reduced maintenance. Prior to application, cables and support structures shall be thoroughly cleaned of dust and dirt, degreased with a neutral cleaner, and surrounding floors, walls, and equipment properly masked.
School of Pure and Applied Physics - Rectifying leakage from the roof Water proofing works
Providing & Applying polymer modified, flexible cementatious negative side waterproofing coating with elastic waterproofing polymers on interior wall plaster surface in three coats @14.35 kg /10 sqm. one coat of self priming of cementatious waterproofing polymer(dilution with water in the ratio of 1:1) and two coats of cementatious waterproofing polymer (dilution with water in the ratio of 3:1 ) after scrapping and properly cleaning the surface to remove pre-existing paint film & loose particles till plaster is visible, complete in all respect as per the direction of Engineer-in-Charge.
Waterproofing of Terraces in ISC,KTIZ,Kalamassery
Providing and applying two component, instant setting, 100% solids, spray applied polyurea waterproofing coating having tensile strength greater than 18 MPa (As per ASTM D412), elongation of >300% (as per ASTM D 412), adhesion to concrete of 2MPa (as per ASTM D 4541), puncture resistance of 1000N (as per ASTM 154) and static crack bridging of up to 2mm (as per ASTM C836). The coating shall be applied with a total consumption of 1.7 Kg/sqm to achieve a DFT of 1.5mm satisfying the requirements of LAM as per ASTM C 898 and shall be applied on the entire horizontal surface continuing up to entire height of the parapets and covering the upstands. The system includes base preparation of cleaning, brushing and removal of flacky materials, angle fillet treatment, priming the surface with two component solvent free epoxy primer applied with a total consumption of 200grams/sqm, followed by spray application Polyurea with a plural spraying machine in 2 or more coats. On completion of the work the area needs to be tested by ponding of water as per the instruction of engineer in charge. Mode of measurement will be actual area treated
Improvement works to AEE office building MNM
Civil Works
PROVIDING CEMENT BASED WATERPROOFING ON JAYANTIA BUILDING ROOF SLAB.
Chemical based Waterproofing works for New Engineering Halls, MSRs, Service Building for New Engineering Halls, CFB, Animal House, Field House, Animal House Service Building, NG Portals and other civil works in various buildings at North Site
Providing and applying cold liquid Polyurethane waterproofing system on Horizontal surfaces including coving (if any) having following layers: (a) Primer / base coat: Providing and applying (Pre-Measured Packed) silver grey coloured 2 (two) component solvent free, odourless, Epoxy-based Primer with excellent adhesive property on the clean and grinded surface/substrate. The substrate can be slightly moist (in concrete, the moisture must be less than 20 %), sound and free from any material that would hinder good adhesion. Mix component 'A' into component 'B' in ratio of 1: 0.16 by weight thoroughly with a clean stirring stick. The mixture should be of uniform colour & free from streaks and be applied evenly with roller. The primer should be completely dry for further application of liquid applied polyurethane based membrane/ coating. The consumption, depending on the nature and condition of the substrate for priming, should be within the range of 250 – 400 gm/sq.m. The rate shall including cost of all material, labour, tools & plants, consumables etc. complete all as directed by EIC. (b) Top coat: Providing and applying cold liquid applied waterproofing based on highly flexible solvent free single component Polyurethane system and special needle punched non woven, system compatible polyester fleece of minimum 120 GSM as reinforcement. The cold liquid applied reinforced system shall have high crack bridging property and shall be UV stable, solvent-free, Cool Roof system. Application procedure: (i) Stir the material well before use. (ii) 2/3rd of the waterproofing mix material to be applied on the primed substrate and the special polyester fleece of min. 120 gsm to be rolled with roller including removal of air bubbles with an overlap of min. 5 cm. (iii) The remaining 1/3rd of the waterproofing material to be poured onto the surface until complete saturation is achieved. The layers should be applied on wet surface of earlier coat and there should not be any time lag during the laying of the system. (iv) After curing, one coat of material approx. 300g/sq.m. to be applied after 24 hours. (v) The total system of waterproofing for material and components shall be procured from single manufacturer. (vi) The total thickness achieved from the application should be from 1.4 to 1.7 mm. (vii) The total consumption of mix waterproofing depending on the nature, porosity and condition of the substrate should be in the range of 2.3 to 2.7 kg/sq.m. The rate shall including cost of all material, labour, tools & plants, consumables etc. complete all as directed by EIC. Specifications/Technical Parameters: The tensile strength of the membrane shall be min. 8.60 N/sq.mm and Elongation at break with fleece shall be min. 83.0 % (with fleece). The Tear Resistance of the membrane shall be min. 41.0 N/mm, Solar Reflection Index (SRI) Value of membrane shall be min. 100, Degree of solar reflectance of the membrane shall be min. 85% and adhesive strength shall be min. 2.40 N/sq.mm. etc. Note : The contractor shall provide min. 10 (ten) years Leak Proof Performance warranty for the complete waterproofing work.