NHIDCL/RO-Imphal/Ccpur-Tipai

Scarifying the existing granular road surface to a depth of 50mm and disposal of scarified material within all lifts and leads upto 1000 meters. (ii) Mechanical means using Hydraulic excavator

Build Up Spray Grout Providing, lalng and rolling of built-up-spray grout layer over prepared base consisting of a two layer composite construction of compacted crushed coarse aggregates using motor grader for aggregates. key stone chips spreader may be used with application of bituminous binder after each layer, and with key aggregates placed on top of the second layer to serve as a Base conforming to the line, grades and cross-section specified, the compacted layer thickness being 75 mm

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, paintaing of tack coat on the sides and base of excavation as per clause 503, back filling the pot holes with hot bituminous material as per clause 511, compacting, trimming and finishing the surface to form a smooth continuous surface all as per clause 3004.2

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) (i) Case-I: Type A

Construction of Subgrade and Earthen Shoulders with Material Obtained from Borrow Pits (Construction of subgrade and earthen shoulders with approaved material obtained from borrow pits with all lifts & leads, transporting to site, spreading, grading to required slope and compacted to meet requirement of table no. 300-2)

Granular Sub-Base with close graded material (Table:-400-1), By mix in Place Method (Conctruction of granular sub-base by providing coarse graded material, spreading in uniform layers with motor grader on prepared surfaced, mixing by mix in place method with rotavator at OMC and compacting with vibratory roller to achieved the desired density, complete as per clause 401(I.R.C Grade-III))

Water Bound Macadam (Providing,laying, spreading and compacting graded stone aggregates of specific sizes to water bound macadam specification including spreading in uniform thickness, hand packing, rolling with 3 wheeled steel/ vibratory roller in stages to proper grade and camber, applying and brooming requsite type of screening/ binding materials to fill up the interstices of coarse aggregate, watering and compacting to the required density. A) By Manual Means (ii) Grading-II (Aggregate size- 53mm to 22.4mm) (a) Using Screening Crushable type such as Moorum or Gravel

Prime Coat on WMM/WBM ( 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 0.70 kg/sqm using mechanical means.)

Tack Coat on Granular surfaces treated with primer (Providing and applying tack coat with bitumen emulsion using emulsion pressur distributor @ 0.25 kg/sqm on the prepared bituminous/granular surface cleaned with mechanical broom.)

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 using Viscocity grade bitumen to required line, grade and level to serve as wearing course on a previously prepared base, including mixing in a suitable plant, laying and rolling with a smooth wheeled roller 8-10 tonne capacity, finished to required level and grades.) (ii) Case-II: Using Penetration grade bitumen and Hot Bitumen Mixer 0.5 Cum