Bitumen Road Work

(GMRT Central Square - Sr. No. 1 to 31) Scarifying the existing bituminous road surface to a depth of 50 to 150 mm (depending upon the site condition) removing, by manual or mechanical means, including transportaion/desposing any where, outside the housing colony and as directed & bringing the existing road to proper grade, level & camber &/ as per super elevation, rolling with 10/12 Tonnes power roller & binding the scarified layer with stone dust/grit/ sand, watering, brushing, rolling, etc. complete as specified and directed by the Engineer. (Note:- This Item Quantity Shall be executed only based on the site condition and whereever required at the time of execution) all complete as directed by GMRT-NCRA.

Earthwork in excavation by mechanical means(hydraulic excavator)/manual means over areas including getting out and disposal of excavated earth lead upto 300 m and for all lift, including dressing to camber, artificial watering and consolidating with road roller of required capacity including making good the undulations etc. and re-rolling the sub grade and disposal of surplus earth within desired location of housing colony etc. all complete as directed by Engineer-in-charge. (Note: The contractor shall arrange all required manpower, survey team, and survey equipment for taking levels before and after execution of the item of work and shall submit the level sheets, charts, and AutoCAD (LS/CS) drawings to GMRT authorities for verification. The levels shall be taken only in the presence of the GMRT Civil representative using Auto Level/Total Station/DGPS with prior approval of GMRT at mutually agreed intervals for measurement, billing, and documentation. No extra payment shall be provided for carrying out the survey work.) all complete as directed by GMRT-NCRA.

Providing and laying Bitumen Penetration Macadam(BPM)/MPM of specified thickness with hard stone aggregate of quality, size and grading as specified, with bitumen of suitable penetration grade, including required key aggregate as specified, spreading coarse aggregate with the help of self propelled/ tipper tail mounted aggregate spreader and applying bitumen by a pressure distributor and then spreading key aggregate with the help of aggregate spreader complete, including consolidation with road roller of minimum 8 to 10 tonne capacity to achieve specified values of compaction and surface accuracy: For 50mm compacted thickness using coarse aggregate of size 50-20 mm graded @ 0.60 cum per 10 sqm key aggregate of size 12.5 mm graded @ 0.15 cum per 10 sqm. With paving asphalt grade VG - 30 @ 50 kg/ 10 sqm. (Note: The contractor shall arrange all required manpower, survey team, and survey equipment for taking levels before and after execution of the item of work and shall submit the level sheets, charts, and AutoCAD (LS/CS) drawings to GMRT authorities for verification. The levels shall be taken only in the presence of the GMRT Civil representative using Auto Level/Total Station/DGPS with prior approval of GMRT at mutually agreed intervals for measurement, billing, and documentation. No extra payment shall be provided for carrying out the survey work.) all complete as directed by GMRT-NCRA.

Providing and applying tack coat using hot straight run bitumen of grade VG - 30, including heating the bitumen at required Temperature, spraying the bitumen with mechanically operated spray unit fitted on bitumen boiler, cleaning and preparing the existing road surface as per specifications : On bituminous surface @ 0.50 Kg /sqm. all complete as directed by GMRT-NCRA.

Providing and laying Bituminous macadam using crushed stone aggregates of specified grading premixed with bituminous binder, transported to site by tippers, laid over a previously prepared surface with paver finisher equiped with electronic sensor to the required grade, level and alignment and rolling with smooth wheeled, vibratory and tandem rollers as per specifications to achieve the desired compaction and density, complete as per specificatons and directions of NCRA. 50 mm average compacted thickness with bitumen of grade VG-30 @ 3.50% (percentage by weight of totalmix) prepared in Drum Type Hot Mix Plant of 60-90 TPH capacity. (Note: The contractor shall arrange all required manpower, survey team, and survey equipment for taking levels before and after execution of the item of work and shall submit the level sheets, charts, and AutoCAD (LS/CS) drawings to GMRT authorities for verification. The levels shall be taken only in the presence of the GMRT Civil representative using Auto Level/Total Station/DGPS with prior approval of GMRT at mutually agreed intervals for measurement, billing, and documentation. No extra payment shall be provided for carrying out the survey work.) all complete as directed by GMRT-NCRA.

Providing and laying Bituminous concrete using crushed stone aggregates of specified grading, premixed with bituminous binder and filler, transporting the hot mix to work site by tippers, laying with paver finisher equiped with electronic sensor to the required grade, level and alignment and rolling with smooth wheeled, vibratory and tandem rollers to achieve the desired compaction and density as per specification, complete and as per directions of NCRA-GMRT. 50 mm compacted thickness with bitumen of grade VG-30 @ 5.5% (percentage by weight of total mix) and lime filler @ 3% (percentage by weight of Aggregate) prepared in drum Type Hot Mix Plant of 60-90 TPH capacity. (Note: The contractor shall arrange all required manpower, survey team, and survey equipment for taking levels before and after execution of the item of work and shall submit the level sheets, charts, and AutoCAD (LS/CS) drawings to GMRT authorities for verification. The levels shall be taken only in the presence of the GMRT Civil representative using Auto Level/Total Station/DGPS with prior approval of GMRT at mutually agreed intervals for measurement, billing, and documentation. No extra payment shall be provided for carrying out the survey work.) all complete as directed by GMRT-NCRA.

2 cm premix carpet surfacing with 1.8 cum and 0.90 cum of stone chippings of 13.2 mm size and 11.2 mm size respectively per 100 sqm and 52 kg and 56 kg of hot bitumen per cum of stone chippings of 13.2 mm and 11.2 mm size respectively, including a tack coat with hot straight run bitumen, including consolidation with road roller of 6 to 9 tonne capacity etc. complete (tack coat to be paid for separately). With paving Asphalt grade VG - 30 with no solvent (Note: The contractor shall arrange all required manpower, survey team, and survey equipment for taking levels before and after execution of the item of work and shall submit the level sheets, charts, and AutoCAD (LS/CS) drawings to GMRT authorities for verification. The levels shall be taken only in the presence of the GMRT Civil representative using Auto Level/Total Station/DGPS with prior approval of GMRT at mutually agreed intervals for measurement, billing, and documentation. No extra payment shall be provided for carrying out the survey work.) all complete as directed by GMRT-NCRA.

Providing and laying seal coat over prepared surface of road with bitumen heated in bitumen boiler fitted with the spray set spraying using 98 kg of bitumen of grade VG -30 and blinding surface with 0.90 cum of M-Sand of 3mm size per 100 sqm of road surface, including rolling and finishing with power road roller a+B46ll complete. all complete as directed by GMRT-NCRA.

Construction of granular sub-base by providing close graded Material conforming to specifications, mixing in a mechanical mix plant at OMC, carriage of mixed material by tippers to work site, for all leads & lifts, spreading in uniform layers of specified thickness with motorgrader on prepared surface and compacting with vibratory power rollerto achieve the desired density, complete as per specifications and directions of NCRA.(Note: The contractor shall arrange all required manpower, survey team, and survey equipment for taking levels before and after execution of the item of work and shall submit the level sheets, charts, and AutoCAD (LS/CS) drawings to GMRT authorities for verification. The levels shall be taken only in the presence of the GMRT Civil representative using Auto Level/Total Station/DGPS with prior approval of GMRT at mutually agreed intervals for measurement, billing, and documentation. No extra payment shall be provided for carrying out the survey work.) all complete as directed by GMRT-NCRA. ----------------------------------------------------------------------------------------- With material conforming to Grade-I of specified thickness (size range 75 mm to 0.075 mm) having CBR Value-30

With material conforming to Grade-II of specified thickness (size range 53 mm to 0.075 mm ) having CBR Value-25