annual plan-ajanur gp sub station pulayanadukam road retarring-70 / 23-24-general civil work; 1 sub station pulayanadukam road retarring 2 3.2:preparation of foundation for embankment
scarifying existing bituminous surface to a depth of 150 mm by mechanical means
scarifying the existing bituminous road surface to a depth of 150 mm and disposal of scarified material with a lift upto 3 m and lead upto 1000 m as per technical specification clause 301.4. 3 75.5.5.b.2pb:modified penetration macadam 75 mm thick using bitumen s-65 - packed bitumen rates
construction of penetration macadam over prepared base by providing a layer of compacted crushed coarse aggregate using chips spreader with alternate applications of bituminous binder and key aggregates and rolling with a three wheel 80-100 kn static roller to achieve the desired degree of compaction as per technical specification clause 506. 4 4.9:wet mix macadam
providing, laying, spreading and compacting graded stone aggregate to wet mix macadam specification including premixing the material with water at omc in mechanical mixer ( pug mill ) , carriage of mixed material by tipper to site, laying in uniform layers in sub-base / base course on a well prepared sub-base and compacting with smooth wheel roller of 80 to 100kn weight to achieve the desired density including lighting, barricading and maintenance of diversion, etc as per tables 400.11 & 400.12 and technical specification clause 406.
by mechanical means with 1 km lead 5 75.5.1.1pb:prime coat - low porosity - with packed bitumen rates
providing and applying primer coat with bitumen emulsion ( ss-1 ) on prepared surface of granular base including cleaning of road surface and spraying primer at the rate of 0.70-1.0 kg / sqm using mechanical means as per technical specification clause 502 6 75.5.2.3pb:tack coat - with packed bitumen rates
providing and applying tack coat with bitumen emulsion ( rs-1 ) using emulsion distributor at the rate of 0.25 to 0.30 kg per sqm on the prepared granular surfaces treated with primer & cleaned with hydraulic broom as per technical specification clause 503. 7 75.5.2.1pb:tack coat - with packed bitumen rates
providing and applying tack coat with bitumen emulsion ( rs-1 ) using emulsion distributor at the rate of 0.20 to 0.25 kg per sqm on the prepared bituminous surface cleaned with hydraulic broom as per technical specification clause 503. 8 75.5.11.1.a.2pb:mix seal surfacing - manual means - type a - bitumen s-65 - packed bitumen rates
providing, laying and rolling of close-graded premix surfacing material of 20 mm thickness composed of 11.2 mm to 0.9 mm ( type-a ) or 13.2 mm to 0.9 mm ( type-b ) aggregates using penetration 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 three wheel 8-10 kn static roller and finishing to required level and grades as per technical specification clause 509
by manual means
type a
( ii ) bitumen ( s-65 )