Water proof treatment at some places in campus at HRI, Prayagraj

Amount

Repair to plaster of thickness 12mm to 20 mm in patches of area 2.5 sqm and under, including cutting the patch in proper shape, raking out joints and preparing plastering the wall surface with white cement based polymer modified self curing mortar, including disposal of rubbish, all complete as per the direction of Engineer-In-Charge.

For sealing cracks and faulty construction joints, routed out/making U-shape groove size 25x25mm and then primed the area with integral crystalline slurry @0.05kg/ running metre and while the surface is tacky filled the groove upto surface with crystalline mortar @1.50kg/ running metre. Once crystalline mortar is touch dry then finally applied two coats of integral crystalline slurry @0.05kg/running metre per coat

Providing and laying APP (Atactic Polypropylene Polymer) modified prefabricated five layer 3 mm thick water proofing membrane, black finished reinforced with non-woven polyester matt consisting of a coat of bitumen primer for bitumen membrane @ 0.40 litre/sqm by the same membrane manufacture of density at 25°C, 0.87-0.89 kg/ litre and viscosity 70-160 cps. Over the primer coat the layer of membrane shall be laid using Butane Torch and sealing all joints etc., and preparing the surface complete. The vital physical and chemical parameters of the membrane shall be as under : Joint strength in longitudinal and transverse direction at 23°C as 650/ 450N/ 5cm. Tear strength in longitudinal and transverse direction as 300/ 250N. Softening point of membrane not less than 150°C. Cold flexibility shall be upto -2°C when tested in accordance with ASTM,D - 5147. The laying of membrane shall be got done through the authorised applicator of the manufacturer of membrane or as directed by Engineer-in-charge.

Providing & Applying polymer modified, flexible cementations 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.

Providing and filing of Thermocole in the gape of Expansion Joint as per requirement and direction of Engineer- in - Charge

Providing and fixing in position 4 mm tk. APP sheet to cover expansion/wall joints as per requirement and direction of Engineer- in - Charge

Providing and injecting cement slurry grouting by fixing 10 to 20 mm dia. suitable nozzle of suitable length, over the surface of PCC/RCC/ beam/ etc and along the construction joint line, cracks, wherever required. Fixing of nozzle shall be in the required portion and the Nozzles shall be fixed with suitable size holes preferably by using repercussive hammer drill (electrically operated) including neat cement slurry admixed with water. Soluble non - shrink based chemical shall be injected through the network of nozzles with low pressure grout pumps (PDP) at a pressure of about 2.0 Kg /cm2, preparing cement slurry by mixing cement with non-shrink @ 500 gms/50 kg bag of cement and water, ensuring that Water : Cement ratio does not exceed 2 (by weight). The viscosity of the resultant solution water/cement/non-shrink should not be more than 1.2 centipoises. Plasticizing agent shall be added wherever required. The grouting shall be started at very low pressure and increased gradually to a required pressure. The grouting shall be continued till the hole refuses to take any further grout, even at an increased pressure. Applied pressure shall not be more than the strength of the PCC/RCC/brick masonry. All the required materials i.e cement, water proofing materials etc. will be provided by the party. After completion of grouting operation, the nozzles shall be sealed properly to the satisfaction of the Engineer-in-Charge.

M/S SHARDA CONSTRUCTION