Birsa Agricultural University Tender

Removal of old tarfelt and disposal of debris with all leads complete job as per direction of E/I

1 Water proofing for Old and New Roof Slab – Providing and laying water proofing treatment on roof slab by applying two Component, factory designed, ready to use, acrylic modified flexible material applied with brush, roller or spray for water proofing coating as per manufacturer specifications with following steps – (a ) surface preparation – Providing and cleaning of concrete surface to remove dust, oil, grease including removal of existing loose paint/coating, and cement laitance by cleaning with compressed air & water jet including all materials, labour, tools complete. Ponding test to be done after plugging all outlets and to be checked from soffit to identify seepage, leakage. On identification of seepage cement grouting to be done with non shrink expanding admisture of Sika India Pvt. Ltd./MYK Schomberg/Dr Fixit/Fosroc or equivalent. Provinding and reparing of all corners and joints such as those between the parapet wall and the roof slab etc shall be chamfered with 150 mm x 150 mm fillet of mortar (Cement sand 1:4) admixed with acrylic polymer of Sika/Fosroc/MYK Schomberg/Dr Fixit or equivalent. Before chamfering a prime coat shall be given with the slurry of acrylic polymer. Repairing surface irregularities, damaged concretein base slab dead cracks if any with an acrylic polymer modified repair mortar including a coat of bonding agent of the same with cement slurry including all material, labour, tools complete. (b) 1st Coat – Apply 1st coat of two component acrylic modified ready to use, flexible cementitious material on surface saturated dry roof and inside wall of Parapet fwall upto 600 mm by brush or roller. After 1st coat of application. 45 gsm of Fibre glass cloth to lay when the first layer is still green. 1st coat should be applied @ 1.50 kg/Sqmt/coat. For the purpose of measurement the entire treated surface will be measured. (c ) 2nd Coat – To apply the 2nd coat of two component acrylic modified ready to use, flexible cementitious material right angle to the 1st coat over the glass fibre laid surface. 2nd coat should be applied @ 0.7 kg/Sqmt/coat. For the purpose of measurement the entire treated surface will be measured”. After three days of drying the 2nd coat, the rain water outlets to be plugged and ponding test to be done for 48 hours to identify seepage, leakage from soffit and if found necessary rectification to be done as per satisfaction of E/C. The waterproof coating to be protected from damage before screed over it. Water proofing Brand- Sika Topseal 10ghi/Fosroc Brushbond RFX/Dr Fixit Pidiffin 2K/MYK Aquafin TG. Product Performance – Chemical Base Part A. Acrylic copolymer, Part B. Specially graded cementitious powder – Density 1.6 kg/1 (mixed density) at + 270C. Tensile Strength – 2 N/mm2 after 28 days (with Fibre cloth) (According to ASTM D 2370) Pullout Bond Strength – 2 N/mm2 \9concrete failure) According to ISO 4624) Slant-Shear Bond Strength -4 N/mm2 (According to FIP 5 .15 Elongation at Break -35% without Fibre Cloth and 20% with Fibre Cloth (According to ASTM D 2370). (d) Protection of treated surface with PCC – The treated surface should be covered with 25 mm/50mm PCC of M-20 grade (1:1:5:3) with proper sloe (1:120) towards the rain outlets in alternate panels of 2 mt x 2 mt keeping 6 mm gap between the panel joint. Integral water proofing admixture conforming to IS 2645 @ 100 ml per bag of cement to be added in the screed concrete (paid separately for this items). All corners shall be just levelled with the screed concrete to ensure smooth discharge of water – the peripheral gaps between pvc pipe outlet and concrete surface should be packed properly with rich concrete and the peripheral mouth to be sealed with moisture insensitive epoxy putty of Sika India Pvt. Ltd./MYK Schomberg/Dr Fixit/Fosroc. For the purpose of measurement the entire treated surface will be measured.” (e) Groove of PCC Surface should be filled with Polysulphide Sealant (Paid separately) Brand – Sika India Pvt. Ltd./MYK Schomberg/Dr Fixit/Fosroc. Warranty for five years. Rate 477.39 sqm

Covering of treated surface with PCC – Providing 25 mm thick cement concrete M20(1:2:5:3) maintaining slope in alternate 2 mt x 2 mt panels with approved quality of stone chips of 20 mm to 6 mm size graded and cleaned sand of F.M. 2.5 to 3 including screening shuttering and mixing cement concrete in mixer with admixture of integral water proofing and placing in position, striking curing, taxes and royality all complete as per building specification and direction of E/I. Panels that has been left should be casted next day. There should be 6 mm gap between panels Brand - – Sika - Plastocrate Plus, MYK proof WP 10, Fosroc – Conplast x 421 ic Dr Fixit Pidiproof LW+