Providing and Laying 30 mm thick Semi Dense Bituminous Concrete (SBDC) on helipad at Shahpurkandi Township and Dam Site, and 25 mm thick mastic asphalt wearing coat on deck slab of spillway bridge at RSD-Project

Amount

Scarifying the existing Bituminous road surface to a depth of 50mm and disposal of scarified material with in all lifts and lead upto 1000 meters

Providing and applying tack coat with penetration grade bitumen VG-10 using bitumen pressure distributor at the rate of 1.00 kg per sqm on the prepared granular surface after cleaning the surface complete as per technical specifications , Tack Coat @ 1.00 Kg per sqm ( for WBM patches where surface dressing not applied)

Providing and laying semi dense bituminous concrete 25mm to 30mm thick with batch type HMP using crushed aggregates of specified grading, premixed with bituminous binder VG-30 @ 5%, 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 complete as per IRC-111 (2009) specifications

Providing and laying seal coat type A (Liquid Seal Coat) sealing the voids in a bituminous surface using crushed stone aggregates and penetration grade bitumen VG-30 @ 0.98kg per sqm laid to the specified levels, grade and cross fall complete as per technical clause 511 of MORT&H specifications

Road marking with hot applied thermoplastic compound 2.5mm thick including reflectorizing glass beads @ 0.25kg per sqm area as per IRC:35 1997 complete as per technical clause 803 of MORT&H specifications

Providing and applying tack coat with bitumen emulsion RS using emulsion pressure distributor at the rate of 0.25 kg per sqm on the prepared bituminous surface/granular surface treated with prime coat after cleaning the surface complete as per technical clause 503 of MORT&H specifications

Providing and laying 25 mm thick mastic asphalt wearing course with paving grade bitumen 85/25 or 30/40 @10.2%, fine aggregates, coarse aggregates, lime filler @ 17.92% of total mix, prepared by using mastic cooker and laid to required level and slope, including providing antiskid surface with bitumen precoated fine grained hard stone chipping at an approximate spacing of 10 cm center to center in both directions, pressed into surface when the temperature of surface is not less than 100 degree C, protruding 1 mm to 4 mm over mastic surface complete as per technical clause 516 of MORT&H specifications.

Providing and laying bituminous macadam 80mm to 100mm thick with Continuous type hot mix plant using crushed aggregates of specified grading premixed with bituminous binder VG-30 @ 3.30%, laid over a previously prepared surface with paver finisher mechanical to the required grade, level and alignment and rolled to achieve the desired compaction complete as per technical clause 504 of MORT&H specifications.

SH SANDEEP KUMAR