All India Institute Of Medical Sciences Tender

Surface prepration:-The surface shall be cleaned to ensure the removal of all dust, dirt, porous substrate shall be coated with a water based acrylic primer master seal 399 of make MBCC-SIKA or Equivalent in one full coat at allowed dry for 1-2 hrs before the applicvation of water rpoofing coating. Water proof coating:- providing and applying two coat of a single component, flexible, solvent free polymermastic waterproofing coating which shall be free of bitumen and coal tar master seal 561 of make MBCC sika applied on the prepared surface in two coat at an interval of two hours between coats at an consumption of 1kg/sqm per coat two achieve a total dry fill thickness of 1 mm and allowed to cure. Coving:- all accessories like fleece lined rubber tape with non woven backing PCI pecktape 120 of make MBSS sika laid along the corners and wall to wall and wall to floor junction sandwithed between the first and second coat of waterproofing coating.

Providing and applying SikaProof-312 HDPE IN SG or equivalent, fully bonded, pre-applied, composite waterproofing sheet membrane system total Composite thickness of Min. 1.2 mm and bare membrane thickness 0.80 mm for underground structures. The membrane should have strong bonding property between pressure sensitive adhesive and fresh concrete, so that there is no lateral water migration between membrane and the structural concrete of underground structure. The overlaps min. 80 mm on side laps bonded using self adhesive selvedge and end laps bonded using double sided tapes, as per suppliers recommendations. The membrane shall have a tensile strength ≥ 25 MPa (film) according to ASTM D412 mod; elongation ≥ 550 % according to ASTM D412 mod ; resistance to static puncture ≥ 1000 N according to ASTM E154; adhesion in peel ≥ 900 N/m N/m according to ASTM D903 mod; resistance to lateral water migration 71 m according to ASTM D 5385 mod and should pass foldability at -23 °C according to ASTM D1970.

Earth work in surface excavation not exceeding 30 cm in depth but exceeding 1.5 m in width,as well as 10 sqm on plan including getting out and disposal of excavated earth upto 50 m and lift upto 1.5 m, as directed by Engineer-in- Charge:All kinds of soil