SPL REPAIR TO LEAKAGE/SEEPAGE, EXTERNAL PLASTER, DRAIN PIPE AND CONNECTED ITEM IN CERTAIN BLDGS (OFFRS MD ACCN) AT SV COLONY MORAR CANTT GWALIOR

Taking down of old roof treatment of any description including mud phushka, concrete padding, tiles, cement plaster from roof surfaces etc including cleaning, brushing and watering to joints and grooves and throwing the same to a distance exc. 250 mtr and not exc 500 mtr from the roof etc complete all as specified and directed.

M&L for repair of all visible hairline cracks on concrete roof / screed more than 0.50 mm thick 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 & directed.

M&L for cutting grooves in brick /concrete wall, 75mm wide and 65mm deep and shaping horizontal face of groove with CM 1:3 complete all as specified and as directed.

M&L for Providing cement concrete 1:2:4 type B1 (using 20 mm graded stone aggregate) in roof kerbs or mud stops, rounded or chamfered on edges or water tank staging, coping etc finished even and smooth without using extra cement complete all as specified and directed.

M&L for applying Smartcare Damp proof, a fibre reinforced elastomeric liquid water proofing membrane formulated with reinforcing acrylic fibers having Sun Reflectivity Index (SRI) of 105 on horizontal/vertical surfaces of roof/wall/chajjas in multiple coats @2.0 litre/sqm. Primary coat is self-priming coat of elastomeric waterproofing liquid (dilution with water in the ratio of 3:1, damp proof: water) and other coats to be applied undiluted. (ii) The undiluted 2nd & 3rd coatings needs to be reinforced with 40 GSM geotextile to be sandwiched between them. (iii) After that final 4th coating shall be applied. The application shall be carried out after scrapping and properly cleaning the surface to remove loose particles with wire brushes complete all as specified and directed. Notes:- (a) The work shall be executed through authorised applicator of manufacturer only. (b) Authrised Applicator shall be approved by GE before starting of work. (c) All materials shall be procured directly form manufacturer. (d) The contractor shall furnish a written guarantee for the effectiveness of the water proofing treatment for a period of Eight years in favour of GE.

M&L the non shrink high mechanical strength properties epoxy based mortar @ 5kg/RM on all corner joints of wall to prevent the capillary formation from wall to roof area; by three component system comprising of base, hardener and quartz filler having ER Base and Hardener with Quartz filler etc complete all as specified & directed.

M&L for applying bonding agent for bonding old to new concrete surface likes chajja/ beam/ceiling/facia etc by high performance modified Styene- Butadiene Rubber (SSR) base binder. Applying of binder is as 10 Sqm/ per lits etc complete all as specified & directed.

M&L for applying 25 mm thick (average) repair mortar ready to use single component polymer modified repair mortar for repair of RCC members likes beams, columns, chajja and facia/ ceiling, mortar having good compressive strength and shrikage resistance etc complete all as specified & directed.

M&L for applying Injection grouting in all RCC members like beam, column, slab, corners of RCC joints etc of building complete all as specified and directed, procedure as follows:- (i) Drilling Holes of 12mm dia upto 100mm deep in structural members at the interval of 300mm in staggered manner or along the crack line in RCC structural member including cleaning of the holes by air blower and M&L for inserting 12mm dia NRV nozzles compatible with epoxy injector and having machined external end to receive outlet of Grouting Gun. Fix the nozzles inside the hole by applying thixotropic epoxy adhesive to ensure complete sealing and allow curing the system for minimum of 8 hrs before grouting: Cut and remove nozzle projections, excess putty, if any, over concrete element by grinding, levelling and finishing the external surface, after completion of the work, etc complete all as specified and directed. The rate shall include scaffolding and other necessary works. (ii) Providing and injecting two parts, low viscous, high strength epoxy resin based moisture insensitive liquid using pressure injector with accessories till nozzle refuses to accept the grout including mixing of grout material components in adequate proportions as per manufacturer's instructions by weight batching and grouting the mixed material into the structural member by grouting gun, maintaining desired pressure in the gun by air compressor and maintaining pressure at exit about 2 to 3 kg/cm2 by monitoring pressure guage at exit. The mixed grout should have following properties:- (i) Mixed Density 1.1 kg/I (at + 27°C); Viscosity ~ 250 mPas at + 30 °C and should comply according to ASTM C 881, Type II and IV, Grade-1, class E+F (i° Compressive strength >+ 70 N/ sqmm (7 days) according to ASTM C 579; Tensile Strength ~ 50 N/sqmm (after 7 days at +30°C cure) (According to ASTM D 638); Tensile Modulus ~2000 N/sqmm (after 7 days at +30°C cure) (According to ASTM D 638); (i) Bond Strength ~ 10.8 N/sqmm (failure in concrete) after 14 days at +30oC cure; Flexural strength ~ 50 N/sqmm according to ISO 178. (iv) Seal the nozzle with thixotropic epoxy adhesive after the refusal of grout material from the nozzle. Rate inclusive of all material, nozzle, tool & plants and any other necessary arrangements required for the procedure as mentioned above.

M&L for 20 mm thick screed bed or bedding layer in cement mortar 1:4 for laying floor finishes complete all as specified and directed.