Repair / Replacement of water proofing treatment to magazine building no.1204,1205,1211, 1212 and building no.1010 of unit-10 inside factory area of OFBL .

Amount

REPAIR/REPLACEMENT OF WATER PROOFING TREATMENT TO MAGAZINE BUILDING NO. 1204,1205,1211, 1212 AND BUILDING NO. 1010 OF UNIT- 10 INSIDE FACTORY AREA OF OFBL.

Excavating over areas, n exc 1.5 m deep and getting out of soft/loose soil and removing excavated material n exc. 50m and depositing where directed at a level n exc. 1.5 m as per direction of E-I-C.

M & L for cleaning of top surfaces of concrete roof with wire brushing and removing existing damaged old water proofing materials of any including flashing and junction of parapets etc. as per direction of E - I - C.

Taking down cement or cement lime plaster any description on brick or stone wall, etc. including racking out joints, hacking for keys, scrubbing down with water , etc .

M & L for providing screed bed or bedding layer of mortar 15mm thick even and smooth surface in cement mortar 1:4 for base water proofing treatment.

M& L for brushing neat cement sluarry with 3.0kg of cement per Sq.mt as directed by EIC.

M & L for Cutting out cracks to V-section in existing roofs or terracing, cleaning out, wetting, grouting with cement and sand slurry 1:3 as directed by EIC. .

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 viscocity 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. (The test certificate of APP and bitumen primer to be produced separately) ( For Bldg.No. 1204,1205,1211, & 1212 of Unit-12) APP membrane of make / Name of manufacturer : Super Thermology of STP Ltd. /Asian Paint Ltd./ MOPLY FP of Texsa India Ltd./IWL India Ltd.

Returing filling in soft or loose soil including spreading levelling, watering and well ramming in layers not exceeding 25cm .

M & L for P.C.C type-1 graded M20 mixed (1:1 1/2 :3 ) using 12.5 mm graded coarse aggregate .

M & L for APP based polymeric membrane minimum weighing 3kg/sqm and minimum 3mm thick reinforced with polyster non wove fabric (wt. not less than 150 gms/sqm) land on primed surface by forced application complete all as specified as directed by EIC.(For Bldg.No. 1010 of Unit- 10)

PRABIRA PADHIARY

Prem Chand Jain