Indian Institute Of Science Tender

Providing and fixing Fiber glass Reinforced Plastic GRATING placed on catwalk width& length of the catwalk 40mm thick FRP GRATING including cost of all materials, labour charges, and hire charges of machineries with necessary scaffolding for cutting & erection with all lead and lift, transportation, etc., complete as per specification.,As per engineer in charge (MR)

Providing 18mm thick cement plaster in signle coat with cement mortar 1:4, to brick masonry including rounding off corners wherever required smooth rendering, Providing and removing scaffolding, including cost of materials, labour, curing complete as per specifications. As per engineer in charge.

ISO Proof Sealer Providing waterproof treatment to roof slab using 2 coats of acrylic co polymer elastomeric ISOPROOF sealer & protector. The surface shall be prepared free of tar, dust, fungus, loose particles etc., The surface shall be applied with basecoat of crystallization liquid and then ISOPROOF, wetting agent and liquid (1:1:6) over the prepared surface. In addition the surface shall be provided with polysulphide/acrylic sealant to V groves, making haunch at junction of parapet and roof slab and at damaged portion using patching mortar to drain off rain water. Over this one coat of flexible cementatious membrane (FCM), Spreading 2 layers of 40 gsm non woven geotextile membrane as reinforcing material (over FCM) with one primer coat of ISOPROOF & applying second coat of ISOPROOF liquid over the primer coat conforming to ASTM D 412 - 1992. The work shall be carried out as per the directions of the Engineer-in-charge. Standards & Methodology: 1) Surface Preparation The surface shall be made free from all dirt, fungus, loose particles by using wire brush. The surface shall be cleaned with solvent like xylene, Toluene, Benzene, dilute hydro chloric acid. A) Cutting of 'V' - Grooves: The V shaped grooves shall be cut along the location of all the visible cracks. The 'V'-grooves shall be of size 5mm as directed by the Engineer-in-charge. 2) Primary reduction of water permeability: The concerntrated crystallization lequid of specific gravity 1.09 is lightly diluted and applied on the prepared surface. The sodium acetate formed during the chemical reaction penetrates insi8de the pores of the concrete and reacts with water to form crystals to block the pores of the concrete, there by reducting water permeability. 3) Porosity and voids reduction (Base coat Application) Applying wetting agent consisting of acrylic monomer, co-polymer liquid and crystallization liquid as base on the prepared surface and V groove and cracks etc., 4) Application of Sealant/Patching Mortar: Cracks will be sealed using suitable sealant or patching mortar, these make them ideally suited for joint treatment. Its adhesion is very strong and binds with the building materials such as concrete, and take care of expansion and contraction in the structures. 5) Levelling course using Flexible Cementatious Material: A concrete mix in the ratio 1:1.5:3 (1: cement : 1.5 quartz powder : 3 graded stone) is laid to make haunch at junction of parapet and roof slab and at damaged portions to drain off water. The factory made dry CEMENTATIOUS silica sand power consisting of dry cement mortar (1 cement : 4 silica sand) shall be mixed with additives like ISOPROOF chemical and acrylic polymer and water to arrice at workable consistency. The same shall be applied over the prepared surface to give even surface and act as base for geo-textile fabric. with necessary scaffolding 6) Non woven Geo Textile fabrick application: Two layers of Non-Woven Geo fabric 40gsm (40=40=80gsm) shall be applied on FCM coating. Geo fabric shall be saturated with acrylic co polymer applied in wet condition. Over this layer, flexible monolithic membrane shall be laid by mixing single component ISO PROOF with water in the ratio of 1:1. 7) Primer coat: A mixture of acrylic monomer (1:1) ISOPROOF & water mixed in proper proportion will be applied on the geotextile membrane. 8) Final coat: Application of ISOPROOF shall be applied at right angles to the primer coat and drying time is about 3 hours. The rate of completion of ISOPROOF for primer and final coat shall not be less than 1.25 Kg per Sq.mtr.

Providing and installing of pre painted Galvolume iron trapezoidal profiled sheet of approved make 1060mm width (1000mm cover width), 28-30mm crest height with crest distance of 200mm c/c with2 ribs at the centre for stiffening. The total coated thickness (TCT) of the sheet will be 0.47mm +/-1.02mm tolerance Zinc-Alu Alloy coating AZ150 gsm as per ASTM 1397/A755-550 mpa steel grade, 5-7 microns epoxy primer on both side of the sheet and polyester top coat 20-22 microns using self drilling/self tapping screws of 25mm length, to be fixed over the existing purlines, rafters, channels and trusses. with necessary scaffolding