SPECIAL REPAIR TO BLDG NO 09 (ADM BLDG) OF 1 UP GIRLS BN NCC UNDER GE (EAST) AGRA

Taking down existing roof treatment and all loose and de-bonded concrete/ screed, loose particles, dirt etc & Debris should be removed from Bldg, roof substrate must be pressure-washed with water with, a minimum working pressure of 1,400 psi is to be used to and/or remove all dirt, dust, chalking and waste products. Remove algae, mold by using bleach solution or biowash etc complete all as specified & directed.

M&L for repair of all visible hairline cracks on concrete roof / screed more than 0.50 mm and not giving hollow sound, should be cut and widen in V shape with mechanical cutter in the size (10mm W x 6mm D). Fill cracks with PU sealant / Hybrid Sealant with suitable gun and smoothed with a putty knife or trowel. Allow sealant to cure a minimum (72 Hrs.) 3 days etc complete all as specified & director.

M&L for remove loose and damaged concrete roof screed in pockets with mechanical cutter. Clean the concrete screed with high pressure water jet to remove dirt and loose particles. Brush apply a bond coat of Pidicrete URP mix in the ratio of 1:1 (URP 1: Cement 1) by volume to make it lump free slurry when applied on in the pre wet surface. Laid to fall roof screed in correct slope and gradient. Mix Dr. Fixit Pidicrete URP 10% by weight of cement in (M20) concrete in ratio of 1:1.5:3 i.e., one bag of 50kg cements: 1.5 times volume of sand: 3 times volume of aggregates: 25L water. Level the repair mortar and finish with trowel average 25mm thick. Moist cure should be done for 7days. Air cure screed for 7days, before application of roof top coat coating system etc complete all as specified & directed.

Apply one coat of Cipoxy 16D primer in the ratio 1:1 spreading at the rate of 0.200 kg-0.250 kg /sqm in complete dry condition where moisture contain below 7% (should be checked with moisture meter)Allow the primer coat to dry for 6 to 8 hours. Apply 1st coat of Roofseal Classic without dilution spreading at the rate of 0.70/litre/Sq.mt/Coat until all surface is covered. Lay a 45 GSM Fibre glass mesh as a reinforcing material which is incorporated in the coating when the first coat is still in wet condition. Allow the first coat to dry for approximately 4 to 6 hours. Apply the second of chemical with the same application coverage, but in a direction perpendicular to that of the first and second coats. Allow each coat to air cure for a minimum of 4-6 hours after application. Check to see no void surface is left untreated / uncoated.Allow the system to air cure for 7 days minimum etc complete all as specified & directed.

Diasmantling bricks (laid flat or on edge) or brick tiles in floors, channels,kerbs, aprons, etc. (each layer) laid bedded and pointed in nay mortor complete all as specified and directed.

M & L brickwork with sub- class ‘B’ bricks ( laid dry/mud mortor) straight or curved on plan exc 6 m mean radius complete all as specified and directed.

All as per item No 06 as above but except brick complete all as specified and directed.

M & L for flush pointing to brick work in CM (1: 3) on laid dry brick work as mentioned in above complete all as specified and directed.

Dismantling floor, hearth wall tiling including cement mortar bedding (but not backing) including rubbish off the premises complete all as specified and directed.

M&L for vitrified colour Ceramic joint free tiles 10 mm thick (square/ rectangular) polished, area of each tiles exceeding 0.18 sqm but not exceeding 0.38sqm, in floors etc. set and jointed in neat cement slurry and pointed in white or coloured cement to match ceramic coloured tiles joint free decorative (square/ rectangular) area of each tiles sqm in floors etc set and jointed in neat cement slurry and pointed with white cement and coloured pigment to match the tiles over 15mm thick screed bed in CM 1:6.complete all as specified and directed.