Supply Of Bituminous Items Under Rate Contract -1. ROOFING MATERIALS - Bitumen Felt, Hessian Base, Type 3, Self finished felt, Grade I for Water Proofing and Damp-Proofing as per IS : 1322 (the Latest version / revision will be considered), Bearing ISI Mark; Width : 1.0 metre, Length : 20 metres, Minimum Weight of Finished Bitmen Felt in Dry condition, 46 Kg per roll of 20 mtrs. 2. BITUMEN - Bitumen for Roof Water proofing (IS:73-2013) Hard Grade with the following Specifications : i) Penetration at 25°C, 100 g, 5 s, 0.1 mm, Min:35 ii) Absolute viscosity at 60°C, Poises: 3200-4800 iii) Kinematic viscosity at 135°C, cSt, Min:400 iv) Flash point (Cleveland open cup), °C, Min: 220 v) Solubility in trichloroethylene, percent, Min:99.0 vi) Softening point (R&B), °C, Min:50 vii) Tests on residue from rolling thin film oven test: a) Viscosity ratio at 60°C, Max: 4.0 b) Ductility at 25°C, cm, Min: 25. 3. Bitumen for Road Surfacing - The specification for paving bitumen (VG-10) grade should conform to the following requirement as per IS 73:2006 :- 1. Absolute viscosity at 60 deg.C, Poises, Min. - 800 2. Kinematic viscosity at 135 deg.C, cSt, Min. - 250 3. Flash Point, (Cleveland open cup),deg.C, Min. - 220 4. Solubility in trichlorethylene percent, Min. - 99.0 5. Penetration at 25 deg.C, 100g, 5s, 0.1 mm - 80-100 6. Softening Point (R&B), deg.C, Min. - 40 7. Tests on residue from thin-film oven tests/RTFOT i) Viscosity ratio at 60 deg.C, Max. - 4.0 ii) Ductility at 25 deg.C, cm, Min. - 75 after thin-film oven test
