Public Works Department Tender

Credit of Old Material (Bricks)

Routine Maintenance of Construction work as per periodicity to routine maintenance mentioned in the technical specifications. (For 5th Year)

Providing and laying Semi Dense Bituminous concrete 25mm to 30mm thick with continuous 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 technical clause 508 of MORT&H specifications. NOTES : -(i) Job mix formula for the semi dense bituminous concrete shall be provided by the agency and shall be got approved from the Project Engineer before adoption at site for execution. (ii) The specification of this item for analytic purpose is kept with bitumen content @ 5% weight of mix variation as compared with job mix formula shall be paid / deducted accordingly. The limits of variation shall be worked out with the approved formula. TECHNICAL NOTE : - i.) A part from the confirmity with the grading and quantity requirement of invidual ingredients exhibited above the mix aggregate i.e. e coarse and fine aggregate for semi dense bituminous concrete shall meet all requirements set forth clause 508 of MORT & H specifications. ii) The final grading for the aggregates required for bituminous concrete confirming to table 500.15 of MORT & H specifications shall be determined after getting the semi dense bituminous concrete designed from either CRRI, New Delhi of Punjab PWD Laboratory at Patiala or any other labaoratory approved by the Chief Engineer/ Deptt. after obtaining 60% of the material for the required grading. The cost of mix design shall be recovered from the contractor. The design mix so finaly approved by the Engineer-in-Charge shall be termed as approved mix. If it is within the permissible limit. In case of variation the same may be got approved from the Chief Engineer Punjab PWD B&R Br. Patiala iii) The approved mix shall exhibit the following details, source and location of all material: - iii (a) Binder expressed as percentage by weight of total mix. iii (b) Course expressed as percentage by weight of total mix. iii (c) Crushed bajri expressed as percentage by weight of total mix. iii (d) Final aggregate expressed as percentage by weight of total mix iii (e) A single definite percentage passing each sieve for mixed aggregates. iii (f) Density of semi dense bituminous concrete after compaction will be not less than 2.30 gm/CC.