SPL REPAIR TO BLDG No P73 AT SUNDERBANI MIL STN UNDER GE(NORTH) AKHNOOR

Taking down old existing roof treatment including PCC padding of any description mileld if any, plastering, removing existing bitumen felt treatment including brushing, cleaning top surface of roof slab, brooming etc incl disposal off debris from MoD land complete all as specified and directed.

15mm thick rendering in cement mortar 1:3 on concrete surfaces of roof and similar items, surface finished even and smooth without using extra cement, complete all as specified & directed.

Roof treatment :- Water proofing treatment to RCC roof slab including parapet as under :- (a) 1st Course : Apply a coat of bituminous primer conforming to IS-3384@ 0.40 Kg /Sqm on prepared surface of plaster and after drying of primer. (b) 2nd Course : Applying evenly a tack coat of industrial bitumen grade 85/25 conforming to IS-702 at rate of 1.2 Kg/Sqm. (c) 3rd Course : APP (Atactic Polypropylene) modified polymeric membrane, 5 layered, 3 mm thick weight not less than 3.0 Kg/Sqm with 160 Grams/Sqm non woven polyester made at centre core reinforced laid with 75 mm side overlap and 150 mm end overlap, membrane has to be laid with LPG torch and overlap sealed and finished neat, all joints. (d) 4th Course : Apply a coat of hot blown 85/25 grade bitumen conforming to IS-702 @ 1.2 Kg/sqm over membrane and dusted with dry sand @ 0.50 to 1 Kg/sqm. (i) On Non-accesible roof : After providing (a) to (c) provide aluminium paint as per manufacturer instructions to be measured separately. (ii) Coved fillet in PCC 1:2:4 type B0 (using 12.5 mm graded crushed stone aggregate) of required radius 75mm shall be provided at the junction of roof and vertical surface such as parapet wall/mumty around opening and treatment mentioned above shall be applied followed by a cement plaster 20mm thick in cement mortar(1:6). Note : (i) Roof treatment work shall be carried out through approved manufacturers only or through their authorised personal only.

Sunken Floor treatment :- Providing and laying of water proofing treatment to sunken portion including vertical portion by applying cement slurry mixed with acrylic based polymer modified cementitious composite compound of make as specified and approved including demolition and filling of sunken floor with & including PCC 1:5:10 type E-2 (using 40mm brick aggregate). (a) First layer of slurry of cement @0.488 Kg/Sqm mixed with acrylic based polymer modified cementitious composite compound @ 0.253 Kg/Sqm. This layer allowed to air cure for 4 Hours. (b) Second layer of slurry of cement @0.242 kg/Sqm mixed with acrylic based polymer modified cementitious composite compound @ 0.125 Kg/Sqm. This layer allowed to air cure for 4 Hours. (c) 15mm thick plaster in CM 1:3 mixed with WP compound to be provided while concrete is still green. (d) Joint of/Trap/WC/Soil pipes shall be properly sealed with sealing compound. Note:(a) Concrete for sunken slabs shall be mixed with WP compounds as per manufacturer's instructions. Before carrying out water proofing treatment the sunken slab shall be tested with water for 48 hours for any leakage /dampness is seen in ceiling below, then treatment is again carried out to RCC slab and it is again tested before passing for next stage. (The rate quoted includes water proofing compound as per manufacturers instructions). (b) Please note that only floor area shall be measured for payment purpose.

Preparation of new or unplastered surface of concrete not otherwise described over 10 cm width or girth and applying two coat of aluminium paint over roof surfaces complete all as specified and directed.

Demolition of brick work or stone boulder masonary built in cement mortar including all quoins, arches, pillars etc but excluding ashlar facings, dressed stonework, complete all as specified and as directed.

Brick work with sub class ‘B’ bricks straight or curved on plan exceeding 6m mean radius built in cement mortar 1:6, complete all as specified and as directed.

Description all as per Item No 7 above but except brick set in CM 1:6 complete all as specified and directed.

Taking down cement plaster of any description on stone or brick walls etc. including racking out joints, hacking for key scrubbing down with water etc.complete all as specified.

Rendering 15mm thick cement plaster with cement mortar(1:4) on other than fair faces of brick work or stone masonry surfaces or one side of lathing and finished even and smooth without using extra cement but including use of WPC as per manufactures instruction complete all as specified and as directed. Note: WPC to be measured separtely