Public Works Department Tender

Providing and applying tack coat with penetration grade bitumen VG-10 using bitumen pressure distributor at the rate of 0.40 kg per sqm on the prepared bituminous surface/granular surface treated with prime coat after cleaning the surface complete as per technical specifications

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Bituminous Concrete 30mm to 45mm thickness (Grading II) Providing and laying bituminous concrete 30mm to 45mm thick with continuous type hot mix plant using crushed aggregates of specified grading, premixed with bituminous binder VG-30 @ 5.4%, carriage of mixed material to site of work, laying with paver finisher mechanical the required grade, level and alignment, rolling with smooth wheeled, vibratory and tandem rollers to achieve the desired compaction complete as per technical clause 507 of MORT&H specifications NOTES:- (i) Job mix formula for the bituminous concrete shall be provided by the agency and shall be got approved from Punjab PWD, B&R Research laboratory Patiala before adoption at site for execution. (ii) The specifications of this item for analytic purpose is kept with bitumen content @ 5.4% weight of mix variation as compared with job mix formula shall be paid/ deducted accordingly. The limits of variations shall be worked out with the approved formula. TECHNICAL NOTE:- i.) Apart from the conformity with the grading and quantity requirement of individual ingredients exhibited above the mix aggregate i.e. coarse and fine aggregate for bituminous concrete shall meet all requirements set forth clause 507 of MORT&H specifications. ii.) The final grading for the aggregates required for bituminous concrete confirming to table 500.17 of MORT&H specifications shall be determined after getting the bituminous concrete designed from Punjab PWD, B&R Research Laboratory Patiala after obtaining 60% of material. The design mix so finally approved shall be termed as the approved mix. The aggregates shall be hydrophobic and of low porosity. The aggregates shall satisfy the physical requirement set forth in table 500-6 (addendum to latest revision). iii.) The approved mix shall exhibit the following details, source and location of all material:- (a) Binder expressed as percentage by weight of total mix. (b) Course expressed as percentage by weight of total mix. (c) Crushed bajri expressed as percentage by weight of total mix. (d) Fine aggregate expressed as percentage by weight of total mix. (e) A single definite percentage passing each sieve for mixed aggregates (f) Density of bituminous concrete after compaction will be not less than 2.35 gm/CC.