NHIDCL/ RO-SHG/ Shillong-Town/ NH-6/ 2025/01/

Granular Sub-Base with coarse graded material Construction of granular sub-base (GSB) of specified grade, 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 clause 401 (ii) for Grading II material

Wet Mix Macadam 'Providing, laying, spreading and compacting graded stone aggreagte to wet mix macadam specification including premixing the material with water with OMC in mechanical mix plant carriage of mixed material by tipper to site, laying in uniform layers with paver in sub-base / base course on well prepared surface and compacting with vibratory roller to achieve the desired density Stripping of excess soil from the shouilder surface to achieve the approved level and compacting with plate compactor at OMC as per drawing and Technical Specification Clause 1903

Prime coat 'Providing and applying primer coat with bitumen emulsion on the prepared surface of granular base including cleaning of road surface and spraying primer at the rate of 0.60 Kg/ sqm using mechanical means. (i) Low porosity

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) Normal bituminous surface @0.25 Kg/sqm

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.) (iii) Granular surface treated with Primer @0.30 Kg/sqm

Dense Bituminous Macadam Providing and laying dense bituminous macadam with 100-120 TPH batch type HMP producing an average output of 75 tonnes per hour using crushed aggregates of specified grading, premixed with bituminous binder transported to site, laid over a previosuly prepared surface with paver finisher to the required grade, level and alignment and rolled as per clause 501.6 and 501.7 to achieve the desired compaction (ii) for Grading-II (19 mm nominal size)

Bituminous Concrete 'Bituminous Concrete (Providing and laying bituminous concrete with 100-120 TPH batch type hot mix plant producing an average output of 75 tonnes per hour using crushed aggregates of specified grading, premixed with bituminous binder @ 5.4 to 5.6 % of mix and filler transporting the hot mix to work site, laying with a hydrostatic paver finisher with sensor control to the reqd. grade, lavel and alignment,rolling with smooth wheeled,vibratory and tandem rollers to achieve the desired compaction as per MoSRT&H cl. no.509. complete in all respect. ( including carriage up to initial lead of 5.0 km from quarry and 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.) '(I) Bitumen (i) For Grading II (10 mm Nominal size)

Drain Clearance 'Removal of earth from the chocked hill side drain and disposing it on the nearest outlet.

PCC (M-20) - for repairing of v-shaped drain & space between carraigeway & drain 'Plan cement concrete in open foundation complete as per drawing and technical specifications. '(B) PCC Grade(M-20)

Random Ruble Masonry Random Rubble masonary (coursed) in cement sand mortar 1:3