Reconstruction of damaged Kopili Power Station Road from 8th Km group 4

Amount

Jungle clearing including cutting bamboo and trees below 500mm girth and removing the same outside the limit as directed. (b) Medium Jungle.

Surface Drains in Ordinary Rock (Construction of unlined surface drain of average cross sectional area 0.4 sqm in ordinary rock to specified lines, grades, levels and dimensions as per approved design and to the requirement of clause 301 to 309. Excavated to be used in embankment at site.) (A) Mechanical Means

Maintenance of Earth Shoulder (stripping excess soil) (Stripping excess soil from the shoulder ( Average depth of 75mm )surface to achieve the approved level and compacting with plate compactor)

Compacting Original Ground - CASE -1 Compacting original ground supporting subgrade (Loosening of the ground upto a level of500 mm below the subgrade level, watered,graded and compacted in layers to meet requirement of table 300-2 for subgrade construction.)

Granular Sub-Base with Coarse Graded Material ( Table:- 400- 2) (Construction of granular sub-base by providing coarse graded material, spreading in uniform layers with motor grader on prepared surface, mixing by mix in place method with rotavator at OMC,and compacting with vibratory roller to achieve the desired density,complete as per cl. 401 (i) for grading- I Material

Water Bound Macadam (Providing, laying, spreading and compacting stone aggregates of specific sizes to water bound macadam specification including spreading in uniform thickness , hand packing, rolling with vibratory roller 8-10 tonnes in stages to proper grade and camber, applying and brooming requisite type of screening/ binding material to fillup the interstices of coarse aggregate,watering and compacting to the reqd. density ( with an initial lead of 5.0 km.) (ii) Grading- II (a) Using Screening Crushable type such as Moorum or Gravel

Filling Pot- holes and Patch Repairs with open - graded Premix surfacing, 20mm. (Removal of all failed material, trimming of completed excavation to provide firm vertical faces, cleaning of surface, painting of tack coat of bitumen emulsion on the sides and base of excavation as per clause 503, back filling the pot holes with hot bituminous material with paving bitumen 60/70 as per clause 511,compacting , trimming and finishing the surface to form a smooth continuous surface, all as per clause 3004.2. (I) using Bitumen emulsion CSS-1h as Tack coat.

Prime coat (Providing and applying primer coat with bitumen emulsion on prepared surface of granular Base including clearing of road surface and spraying primer at the rate of 0.60 kg/sqm using mechanical means.)(Including cost of testing of materials at site and laboratory as directed by the deptt.) (A)With bitumen emulsion-CSS-1h

Open - Graded Premix Surfacing (Providing,laying and rolling of open - graded premix surfacing of 20 mm thickness composed of 13.2 mm to 5.6 mm aggregates either using penetration grade bitumen to required line,grade and level to serve as wearingcoarse on a previously prepared base, including mixing in a suitable plant laying and rolling with a smooth wheeled roller 8-10 T capacity to the reqd. level and grade. (including carriage of mixed materials up to 10.0 Km initial lead from mixing plant )( Including cost of testing of materials at site and laboratory as directed by the deptt.) (A) Without anti stripping agent (I)Mechanical method using Penetration grade sqm 137.00 Bitumen ( 60/70 or VG-30 grade) and HMP of appropriate capacity not less than 75 tonnes /hour.

Tack coat Providing and applying tack coat with bitumen emulsion using emulsion pressure distributor at the rate of 0.20 kg per sqm on the prepared bituminous/granular surface cleaned with mechanical broom.( Including cost of testing of materials at site and laboratory as directed by the deptt.) (I) With Bitumen emulsion CSS-1h (a)Normal bituminous surface sqm 11.00

Seal Coat (Providing and laying seal coat sealing the voids in a bituminous surface laid to the specified levels, grade and cross fall using Type A and B seal coats) ( Including cost of testing of materials at site and laboratory as directed by the deptt.)(A) Without anti stripping agent. CASE-1 Type A (Providing and laying liquid seal coat comprising of a layer of bituminous binder ( paving bitumen 60/70 or VG-30 grade, followed by a cover of crushed stone chipping of specified grade.

RAMSING RONGHI