Repair and repainting of external wall of Library and Computer Centre Building in IIT Guwahati Campus

Amount

Expansion Joints:

Step-1 Removal of all the filling materials from the joints. Clean and grind off edges to smooth of surface free from loose particle, pointing edges etc., and applying ABRO tape on either sides of the joints to earmark appliaction of adhesives, including cost of labour, consumables, tools and tackles etc., complete.

Step-2 Providing and applying Talrak Tenseal EP or equivalent adhesive for sealing the moving/ non moving joints between the structural members, as per manufacturers specification, including cost of materials, labour, consumables, tools and tackles etc., complete.

Step-3 Providing and laying Talrak Tenseal XS or equivalent joint tap of 150 mm to 200 mm width for sealing the separation joint between the structural members, as per manufacturers specification, including cost of materials, labour, consumables, tools and tackles etc., complete.

Damproofing in Walls

Surface preparation:

Step-1 Dismantling old plaster or skirting raking out joints and cleaning the surface including disposal of rubbish to the dumping ground within the campus as directed by Engineer in charge.

Step-2 Providing and applying Koster Polysil TG 500 or equivalent primer on the prepared surface as per manufacturers specifications, including cost of materials, labour, consumables, tools and tackles, etc., complete.

Step-3 Providing and applying Talrak Flexeal Elastic or equivalent waterproofing coating on the primed surface in two coats, as per manufacturers specifications, including cost of materials, labour, consumables, tools and tackles, etc., complete.

Step-4 15 mm thick plastering with cement mortar 1:4 (1 cement: 4 fine aggregate) over the water proofing treatment area admixed with Acrylic Polymer@ 10% by weight of cement.

Structural steel / bar repairing work:

(a) Cleaning rebars to remove corrosion scales/ rust using Talrak ® Cleaner GP or equivalent (Cleaning existing reinforcement with wire/ rotary wire brush,making the surfaces free from loose material, dirt etc. complete) on the rebars, including cleaning the reinforcement wire brushing to remove loose rust spalls, clean all rust with water as per the recommendation of manufacturer complete as per direction of Engineer-in charge. (Including scaffolding and working platform etc.suitable for safe working coditions)

(b) Providing and laying anticorrosive Treatment of Reinforcement with Zinc rich Primer of Talrakote ® ZE or equivalent (The application shall be by brush).Process is to be complete as per the recommendation of manufacturer and direction of Engineer-in-charge. (Including scaffolding and working platform etc. suitable for safe working coditions)

Providing and applying pre batched one componened Polymer modified cementious patch repair mortar of 10-12 mm thick in a layer as per manufacturer recommendation ans as direction of EIC: If any where additional thickness required more than 12 mm, need to applying in two layers. Product: rENDERCEM @ GO or equivalent Compressive strength ≥ 50 Mpa (28 days) as per ASTM C 109 Flexureal Strength≥ 3 Mpa (7 days) As per ASTM C 293-79 (including scaffolding and working platform etc. suitable for safe working conditions)

Curing compound application by brush/ spray of liquid surface curing aid Talrakcure @ AS or equivalent supplied in white fugitive pigment, Specific Gravity: ~ 1.25, Viscosity: 14 secs. In B4 Cup, When first applied to a fresh cementitious surface the product, forms a surface coat. this coating, dries to a form a contineous film which provides a barrier to moisture loss ensuring more efficient cement hydration, improved durability and reduced shrinkage. Finish as per the Manufacturer's specification (Including scaffolding and working platform etc. suitable for safe working conditions)

Major Cracks Repairing in Brick Wall:

Cutting the existing crack in a 'V' shape groove cleaning the same with proper means Application of one coats of Epoxy Bonding Agent followed by application of Sika 214 non- shrinkage powder over the entire crack area and let dry. Finally plaster the surface wherever necessary.

Providing and applying white cement based putty of average thickness 1 mm, of approved brand and manufacturer, over the plastered wall surface to prepare the surface even and smooth complete.

Applying one coat of water thinnable cement primer of approved brand and manufacture on wall surface :

(a) Water thinnable cement primer

Distempering with 1st quality acrylic distemper (ready mixed) of approved manufacturer, of required shade and colour complete, as per manufacturer's specification.

(a) Two or more coats on new work

Varnishing with flatting varnish of approved brand and manufacture one or more coats on old work

Finishing walls with Acrylic Smooth exterior paint of required shade :

New work (Two or more coat applied @ 1.67 ltr/10 sqm over and including priming coat of exterior primer applied @ 2.20 kg/10 sqm)