REPAIRING AND SURFACING OF EXISTING BITUMINOUS ROAD SURFACE - LANKA BARI

Clearing and grubbing road land including uprooting wild vegetation, grass, bushes, shrubs, saplings and trees of girth upto 300 mm, removal of stumps of such trees cut earlier and disposal of unserviceable materials and stacking of serviceable material to be used or auctioned, upto a lead of 1000 m including removal and disposal of top organic soil not exceeding 150 mm in thickness as per Technical Specifications Clause 201 for Rural Roads of MORD.II) By Mechanical Means A) In area of light jungle (VP-72, Item-2.-3(I)A)

Maintenance of Earthen Shoulder (filling with fresh soil) Making up irregularities/loss of material on shoulder to the design level by adding fresh approved soil and compacting it with appropriate equipment as per the requirement of MORT&H's specification 3003. (VP- 167,Item-10-2)

Scarifying Existing Bituminous Surface to a depth of 50 mm by Mechanical Means Scarifying the existing bituminous road surface to a depth of 50 mm and disposal of scarified material within all lifts and lead upto 1000 metres (Reference to MoRT&H's specification clause 305.4.3). (VP- 87, Item-15)

Filling Pot-holes and Patch Repairs with open-Graded Premix surfacing, 20mm Removal of all failed material,in the pavement courses and if necessary below the pavement,until the root causes of the failure is removed, the trimming of completed excavation to provide firm vertical faces; specified for the pavement layer; application of tack coat conforming to cl. 503 of MORT&H's specification ,on to the sides and base of excavation prior to placing hot bituminous material as per clause 510 and the compaction,trimming and finishing of the surfaces of all patches to form a smooth continuous surface, level with the surrounding road as per the requirement of clause 3004.2 of MORT&H's specification. (VP- 167,Item-10-4)

Water Bound Macadam Providing, laying, spreading and compacting stone aggregates of specific sizes to water boundmacadam specification including spreading in uniform thickness, hand packing, rolling with 3 wheeled steel/ vibratory roller 8-10 tonnes in stages to proper grade and camber, applyingand brooming requisite type of screening/ binding Materials to fill up the interstices of coarse aggregate, watering and compacting to the required density (Reference to MoRT&H'sspecification 404). By Manual Means Grading-1 (Table 400-9) Using Screening (Table 400-10) Type-B (11.2 mm aggregate) (VP-103, Item-4-9A(i)c)

Water Bound Macadam Providing, laying, spreading and compacting stone aggregates of specific sizes to water boundmacadam specification including spreading in uniform thickness, hand packing, rolling with 3 wheeled steel/ vibratory roller 8-10 tonnes in stages to proper grade and camber, applyingand brooming requisite type of screening/ binding Materials to fill up the interstices of coarse aggregate, watering and compacting to the required density (Reference to MoRT&H'sspecification 404). By Manual Means Grading-2 (Table 400-9) Using Screening (Table 400-10)Type-B (11.2 mm aggregate) (VP-104, Item-4-9A(ii)b)

Prime Coat Providing and applying primer coat with cationic bitumen emulsion SS1 grade conforming to IS:8887 on prepared porous granular surface including clearing of road surface and spraying primer using mechanical means (Reference to MORT&H's specification clause 502). On WMM/WBM surface @ .85kg /sqm. (VP-110, Item-5-1A(i))

Tack Coat Providing and applying tack coat with Cationic bitumen emulsion (RS1) complying with IS:8887 using emulsion pressure distributor on the prepared bituminous/granular/cement concrete pavement surface cleaned with mechanical broom and high pressure air jet(Reference to MORT&H'sspecification clause 503). ii)On Granular surface treated with primer @ 0.25kg-0.30 /sqm. (VP-111, Item-5-2A(ii))

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 viscosity grade bitumen of approved grade 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 tandem or other approved type roller 8-10 tonne capacity, finished to required level and grades (Reference to MORT&H's specification clause 510). Case - I: Mechanical method using approved grade Bitumen and HMPof appropriate capacity not less than 75 tonnes/hour . (VP -119, Item. 10(i))

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 (Reference to MORT&H's specification clause 511 Case - II : Type B Providing and laying of premix sand seal coat with HMP using approved crushed stone chipping and viscosity grade paving bitumen of suitable approved grade. (VP - 121, Item-12(ii))