SPECIAL REPAIRS (B/R) OF WATCH TOWERS AT NAD KARWAR

Dismantling/ Taking out existing hessian-based felt or any other existing waterproofing treatment from roof, including cement plaster and exposing the top surface of RCC slab, including removing the dismantled debris to a distance exceeding 200 m and not exceeding 250 m, complete all as specified and directed.

Surface preparation: - Preparing the concrete surface to remove dust, dirt, laitance, etc., using mechanical means and treating minor defects in concrete with polymer-modified mortar using SmartCare Repair Polymer (SBR).

Application: Providing and Installing SmartCare TPO Membrane Reinforced Membrane or Equivalent is a high performance, heat weldable, scrim reinforced thermoplastic polyolefin (TPO) sheet manufactured & supplied in thickness of 1.5mm as per UNI EN 1849-2, designed for waterproofing and heat shielding roofs of new and existing buildings. The membrane shall have elongation at break >15% as per UNI EN 12311-2 , Hydrostatic Pressure Resistance (6 hrs @5 bar) as per UNI EN 1928 met B ,Tearing Strength (N) >300 as per UNI EN 12310-2, Puncture resistance (mm) of >700 as per DIN 16726-5.12 , Tensile Strength (N/5 cm) is >1100 as per UNI EN 12311-2, the joint of membrane should welded with double seam welding machine and detailing of membrane can be done through hand applied welding tools. The membrane shall be terminated at min height of 300mm above FFL in the vertical areas using termination bar and mechanical fasteners and PU sealant, complete as per manufacturer specifications and product data sheets.

Demolition of cement concrete in any position and paving's not exceeding 15 cm thickness (below or above ground level).

M&L for plain cement concrete (1:2:4) type B2 using 40 mm graded stone aggregates in surface channels and drains, all as specified and directed.

Extra for forming fair-finished drains or channels of 30 cm inner girth in cement concrete using extra cement, including forms, moulds, mitred/stopped ends, etc., complete and as directed.

M&L for 75 mm thick PCC (1:3:6), type C2 using 20 mm graded stone aggregate as in hardstanding/plinth protection, and finished the concrete surface even and smooth without using extra cement, complete as specified and directed.

M&L PCC (1:4:8) type D2 using 40 mm graded stone aggregate, 100 mm thick as in sub-base for floors, hardstanding's, etc., complete as specified and directed.

M&L for sand filling under floors, including watering and consolidation.

M&L for machine-pressed precast concrete interlocking paver blocks of any shape and size conforming to IS 15658:2006, 60 mm thick, M35 grade, using grey cement and pigment.