Stage Strengthening work from km 317.00 to km 320.00 of NH-60 (new NH-14) under NH Division No- XII in the District of Birbhum, West Bengal during the year 2022-23 on SBD mode.

Amount

Construction of Shoulders A. Earthen Shoulders The rate as applicable for Sub-grade construction may be adopted. B. Hard Shoulders Rate as applicable for sub-base and or base may be adopted as per approved design.

Dismantling of Flexible Pavements Dismantling of flexible pavements and disposal of dismantled materials up to a lead of 1000 metres, stacking serviceable and unserviceable materials separately (Reference to MoRT&H's specification clause 202) By Mechanical Means Bituminous course

Wet Mix Macadam Providing, laying, spreading and compacting graded stone aggregate conforming to the grading of table 400- 13 revised vide table 2 of IRC : 109 (2015) to wet mix macadam specification including premixing the Material with water at 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 .The thickness of a single compacted layer shall not be less than 75 mm.

Primer 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). n WMM/WBM surface @ 0.70-1.0kg /sqm.

Dense Graded Bituminous Macadam (Grading-2) Providing and laying Dense Graded Bituminous Macadam (Grading-2) with 100-120 TPH batch type HMP producing an average output of 75 tonnes per hour using Pakur quality stone crushed aggregates of specified grading, premixed with bituminous binder @ 4.0 to 4.5 per cent by weight of total mix and filler(Cement /lime / Rock dust ), transporting the hot mix to work site, laying with a hydrostatic paver finisher with sensor control to the required grade, level and alignment, rolling with smooth wheeled, vibratory and tandem rollers to achieve the desired compaction as per MORT&H specification clause No. 505.4 complete in all respects (Reference to MORT&H's specification clause 505).

Tack Coat Providing and applying Tack Coat with bitumen emulsion (RS grade) using emulsion pressure distributor on the prepared surface cleaned with mechanical broom (Reference to MORT&H's specification clause 503), using RS Type Bituminous Emulsion @ 0.20 kg / sqm.

Mastic Asphalt Providing and laying 40 mm thick mastic asphalt wearing course with paving grade bitumen meeting the requirements given in table 500-29, prepared by using mastic cooker and laid to required level and slope after cleaning the surface, including providing antiskid surface with bitumen precoated fine-grained hard stone chipping of 13.2 mm nominal size at the rate of 0.005cum per 10 sqm and at an approximate spacing of 10 cm center to center in both directions, pressed into surface when the temperature of surfaces is not less than 1000C, protruding 1 mm to 4 mm over mastic surface, all complete as per clause 515

ROAD FURNITURE & MISCELLANEOUS WORKS Providing and fixing of retro- reflectorised cautionary, mandatory and informatory sign as per IRC :67 made of high intensity grade sheeting vide clause 801.3, fixed over aluminium sheeting, 1.5 mm thick supported on a mild steel angle iron post 75 mm x 75 mm x 6 mm firmly fixed to the ground by means of properly designed foundation with M15 grade cement concrete 45 cm x 45 cm x 60 cm, 60 cm below ground level as per approved drawing & Technical Specification Clause 801 & as directed by Engineer i) 90 cm equilateral triangle

ii) 60 cm equilateral triangle

iii) 60 cm circular

vi) 60cm X 60 cm square

vi) 80cm X 60 cm square

Proving & Fixing KM post etc Road Distance Indicator Reinforced cement concrete M15 grade kilometre stone of standard design as per IRC:8-1980, fixing in position including painting and printing etc (Reference to MORT&H's specification 805). Ordinary kilometer stone (precast)

Road Marking with Hot Applied Thermoplastic Compound with Reflectorising Glass Beads on Concrete Surface (Providing and laying of hot applied thermoplastic compound 2.5 mm thick including reflectorising glass beads @ 250 gms per sqm area, thickness of 2.5 mm is exclusive of surface applied glass beads as per IRC:35 .The finished surface to be level, uniform and free from streaks and holes.

Supplying & fixing of Raised Pavement Markers/Road Studs/Cats Eye made of polycarbonate moulded body and reflective panels with micro prismatic lens capable of providing total internal reflection of the light entering the lens face which shall support a load of 13635 kg tested in accordance to ASTM D 4280 Type H and compling to Specifications of Category A of MoR&TH Circular No. RW/NH/33023/10-97 - DO III Dt. 11.06.1997 & MoRT&H's specification for Road &Bridge Works (Fifth Rev.). Marker height shall not be less than 10 mm and shall not exceed 20 mm, width shall not exceed 130mm and with minimum reflective area of 13 sqcm on each side and slope to the base shall be 35 ± 5 degree. Fixing will be without nails but by using epoxy resin based adhesive as per manufacturer's recommendation including site clearence etc and complete as directed by the Engineer in Charge. The contractor will have to provide a test certificate from a reputable national/international laboratory comforming the above specifications.

M/S TAPAS KUMAR CHAKRABORTY

BISWAJYOTI BHATTACHARYYA