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| 1 | Construction of 5' span slab type culvert with 32' formation width complete in all respects. |
| 2 | Construction of embankment with earth obtained from roadway cutting or excavation including spreading, grading to required slope and compacting to meet requirement of table 300-2 as per technical clause 305 of MORT&H specifications 24.5 B |
| 3 | Providing, laying, spreading and compacting graded stone aggregate to wet mix macadam specification including premixing the Material with water at OMC in mechanical mix plant, carriage from mix plant to site of work, laying in uniform layers with paver in sub- base / base course on well prepared surface and compacting with vibratory roller to achieve the desired density complete as per technical clause 406 of MORT&H specifications |
| 4 | Providing and applying primer coat with bitumen emulsion SS on prepared surface of granular base including cleaning of road surface and spraying primer at the rate of 0.85kg/sqm complete as per technical clause 502 of MORT&H specifications |
| 5 | 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 |
| 6 | Providing and laying bituminous macadam 50mm to 75mm thick with Continous type hot mix plant using crushed aggregates of specified grading premixed with bituminous binder VG-30 @3.4%, carriage of mixed material to site of work, laid over a previously prepared surface with paver finisher to the required grade, level and alignment and rolled to achieve the desired compaction complete as per technical clause 504 of MORT&H specifications |
| 7 | Notes:-I. The actual volume of the aggregate to be paid for shal lbe computed after deducting the specified percentage from the volume computed by stacks measurement as per MORT&H specifications (addendum to latest revision) for the purpose of secured advance.II. The final grading for the aggregates requiredfor bitumenious macadam course Grading-2 for 75mm /50mm thickness of each layer conforming to table 500-7 of MORT&H specifications (addendum to latest revision) shall be determined after getting the bituminous macadam grading-2 designed from Punjab PWD B&R Research Laboratory Patiala after obtaining 60% of material. The design mix so finally approved by shall be termed as the approved mix. The aggregates shall be hydrophobic and of low porosity. The aggregates shall satisfy the physical requirement set fourth in table 500-6 (addendum to latest revision). |
| 8 | III. The mix shall exhibit the following details:a) Binder expressed as a percentage by weight of total mix.b) Coarse aggregate of 26.5mm gauge expressed as percentage by weight of total mix.c) Crushed Bajri of 11.2mm size expressed as percentage by weight of total mix.d) Fine aggregates 4.75 mm below expressed as percentage by weight of total mix.e) A single definite percentage passing each sieve for mixed aggregates.f) Density of Bituminous Macadam (75mm /50mm thick after compaction) shall be minimum 2.2 gms/C.C & nothing extra shall be payable if higher density is achieved at site.IV) The contractor thereafter, shall be required to complete the supply of various ingradients or Bituminious Macadam as per proportions stipulated in the approved mix.V) Rate of B.M. shall be quoted by the contractor with respect to binder content percentage by weight of mix being 3.4% if Laboratory designs a mix with different percentage then the differenc |
| 9 | Providing and applying tack coat with bitumen using emulsion R.S 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 |
| 10 | Providing and laying bituminous concrete 30mm to 45mm thick with Continuous type HMP using with paver finisher mechanical crushed aggregates of specified grading, premixed with bituminous binder VG-30 @ 5.4%, carriage of mixed material to site of work, 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 509 of MORT&H specifications |
| 11 | 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 specification 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 variation shall be worked out with the approved formula.TECHNICAL NOTE : -i.) Apart from the confirmity with the grading and quantity requirement of invidual 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 5th Revision specifications. |
| 12 | ii) The final grading for the aggregates required for bituminous concrete confirming to table 500.17 of MORT&H 5th Revision 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 fourth 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 dense bituminous macadam after compaction will be not less than 2.35 gm/CC Please Enable Macros to View BoQ information |
