Maintenance of different roads under 17_Golaghati and 19_Charilum AC area within Bishalgarh Sub Division, PWD (RnB) during the year 2025_26_SH_Patch grouting, re_carpeting, sand seal coat etc

Patch repairing/ Maintenance of bituminous surface road using Jhama brick aggregate & Viscosity Graded bitumen (VG-30) Repairing pot-holes and making up small depressions with ramming or power rolling after removal/ disposal of disintegrated materials within a lead of 50 m, cutting pot holes to regular shapes with vertical edges and levelling the bottom, cleaning the same with compressed air or any other appropriate method including screening, cleaning of aggregates; and filling up with with jhama chips using bitumen of VG-30 @ 54 kg per m3 of loose volume of jhama brick chips, after applying tack coat of bitumen on sides and bottom @ 0.75 kg/ sqm and finishing the top of repaired surface levelled with adjoining area in proper grade and camber including spreading of sand @ 0.006 cum/ sqm of prepared road surface as per direction of the Engineer-inCharge and all as per MoRD technical specification Clauses 1900, 502, 503 and 504.

Tack coat using hot straight run bitumen of grade VG-30 on bituminous surface Providing and applying tack coat using hot straight run bitumen of grade VG-30, including heating the bitumen, spraying the bitumen, cleaning and preparing the existing road surface as per specifications: On bituminous surface @ 0.50 Kg/ Sqm.

20 mm thick Open-Graded Premix Carpet using Bituminous (Viscosity grade/ modified bitumen) Binder 508. Providing, laying and rolling of open-graded premix carpet of 20 mm thickness composed of 13.2 mm to 5.6 mm aggregates either using Viscosity grade bitumen or emulsion 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 80 - 100 kN static roller capacity, finished to required level and grades to be followed by seal coat of either Type A or Type B or Type C or Type D as per MoRD Technical Specification Clause 508. Case - I : By Manual Means (I) Bitumen of VG-30

Seal Coat Providing and laying seal coat sealing the voids in a bituminious surface laid to the specified levels, grade and cross fall using Type A, or Type B or Type C or type D as per MoRD Techinical Specification Clause 510 A. By Manual Means Case - IV : Type D (premix with fine sand) (I) Bitumen of VG-30

Seal coat on old bituminous road surface. Sand seal coat on old bituminous road surface by applying Viscosity Graded (VG-30) [email protected] kg per sqmusing rubber brush after proper cleaning of the road surface and spreading of river [email protected] cum/10 sqmcomplete as per specification and direction of the Engg.-in-Charge.