| # | Code | Description | Unit | Qty | Rate (₹) | Amount (₹) |
|---|---|---|---|---|---|---|
| 1 | 16.78.2 | GsbConstruction of granular sub-base by providing close graded Material conforming to specifications, mixing in a mechanical mix plant at OMC, carriage of mixed material by tippers to work site, for all leads & lifts, spreading in uniform layers of specified thickness with motor grader on prepared surface and compacting with vibratory power roller to achieve the desired density, complete as per specifications and directions of Engineer-in-Charge. — With material conforming to Grade-II (size range 53 mm to 0.075 mm ) having CBR Value-25 | Cum | 1,372.50 | 2,924.85 | 40,14,356.63 |
| 2 | 16.80 | Dlc Sub BaseConstruction of dry lean cement concrete sub base over a prepared sub- grade with coarse and fine aggregate conforming to IS:383, the size of coarse aggregate not exceeding 25 mm, aggregate cement ratio not to exceed 15:1, aggregate gradation after blending to be as per specifications, cement content not to be less than 150 Kg/cum, optimum moisture content to be determined during trial length construction, concrete strength not to be less than 10 Mpa at 7 days, mixed in a batching plant, transported to site, for all leads & lifts, laid with a mechanical paver, compacting with 8-10 tonne vibratory roller, finishing and curing etc. complete as per direction of Engineer-in- charge. | Cum | 870.00 | 4,148.65 | 36,09,325.50 |
| 3 | 5.3 | Pqc SlabReinforced cement concrete work in beams, suspended floors, roofs having slope up to 15° landings, balconies, shelves, chajjas, lintels, bands, plain window sills, staircases and spiral stair cases above plinth level up to floor five level, excluding the cost of centering, shuttering, finishing and reinforcement with 1:1.5:3 (1 cement : 1.5 coarse sand(zone-III) derived from natural sources : 3 graded stone aggregate 20 mm nominal size derived from natural sources). | Cum | 1,100.00 | 11,505.50 | 1,26,56,050.00 |
| 4 | 5.22.6 | Dowel Tie SteelSteel reinforcement for R.C.C. work including straightening, cutting, bending, placing in position and binding all complete upto plinth level. — Thermo-Mechanically Treated bars of grade Fe-500D or more. | Kg | 13,200.00 | 107.85 | 14,23,620.00 |
| 5 | 16.7.1 | Brick EdgeBrick edging in full brick width and half brick depth including excavation, refilling and disposal of surplus earth lead upto 50 metres. — With common burnt clay F.P.S. (non modular) bricks of class designation 7.5 | Metre | 2,000.00 | 194.30 | 3,88,600.00 |
| Your inputsRoad length 1 km · Carriageway width 5.5 m · Granular sub-base 225 mm · Dry Lean Concrete sub-base 150 mm · PQC pavement slab 200 mm · Brick edging on both shoulders | TOTAL | ₹2,20,91,952 | ||||
- PQC = Pavement Quality Concrete (M-40 design mix per IRC 58). The Builder uses DSR 5.3 (RCC beams/floors, M20 1:1.5:3) as the closest in-CPWD-DSR rate; actual PQC paving rate is typically 10-15% LOWER than this (slip-form paving has lower labour productivity loss than beam casting).
- Steel quantity = 12 kg/m³ — accounts only for **dowel bars** at transverse joints (32 mm × 500 mm @ 300 mm c/c, every 4.5 m) + **tie bars** at longitudinal joints (12 mm × 640 mm @ 550 mm c/c). PQC is plain concrete; no mesh / mat reinforcement. For 2-lane roads add ~10% for the central longitudinal joint tie bars.
- PQC pavement is cast with **slip-form paver** or screed paver against side rails (brick edging / kerb stone forms the side restraint) — NO bottom formwork / centering required. This is why 5.9.3 centering is NOT in the items list (unlike a regular RCC beam/slab).
- Joint sealant (silicone or hot-applied bitumen sealant in transverse + longitudinal joints) is NOT included — typical cost ₹50-80 per running metre of joint, total ~₹40-60k / km. Add manually.
- Layer stack per IRC 58: subgrade → GSB → DLC → PQC. Total compacted thickness 575 mm for default 225+150+200 mm. Heavier specs (NH, port-access) go up to 700-800 mm total.
- DLC (Dry Lean Concrete) is a low-strength M-10 grade concrete sub-base that provides a stable platform for PQC casting + prevents fines pumping from below. Mandatory under IRC 58 for any PQC pavement.
- Excludes: subgrade earthwork (cut/fill — depends on terrain); joint sealant; saw-cut joints (transverse + longitudinal); curing membrane + curing compound (typically 7-day water curing); reflective markers on transverse joints; line marking; signage; gully gratings; storm drains.
**Rigid (concrete) pavement roads** per IRC 58 are the durable, low-maintenance alternative to bituminous roads — used wherever heavy vehicular loading, long lifespan, or zero re-surfacing cost matters more than initial cost. AMRUT urban roads, industrial corridor access, port/airport approach, factory roads, multi-storey-residential gated society roads. The CPWD / IRC 58 standard configuration: Granular Sub-Base + Dry Lean Concrete + Pavement Quality Concrete slab + dowel & tie bars + brick / kerb edging. This BOQ Builder generates the complete per-km cost per CPWD DSR 2023.
Concrete vs Bituminous — when to use which
**Concrete (rigid)** — 25-40 year lifespan, very low maintenance (just sealing joints every 5-7 years), high initial cost (₹85-110 lakh / km), heavy load capacity. Best for: industrial roads, port + airport access, urban arterials, multi-storey residential gated-society roads, salt-spray coastal sites. **Bituminous (flexible)** — 10-15 year design life, periodic overlay (every 5-7 years), lower initial cost (₹55-70 lakh / km), more sensitive to overload. Best for: PMGSY rural roads, state PWD inter-village links, residential colonies, normal traffic up to 1500 cv/day. Cross-over point: when traffic > 4500 cv/day OR specialised loading (containers, hot-mix-plant) OR coastal salt-spray, prefer concrete. Otherwise bituminous wins on cost.
Why DLC is mandatory under PQC
PQC is rigid pavement concrete (M-40 design mix, 28-day flexural strength ≥ 4.5 MPa, very low water-cement ratio). Casting M-40 concrete directly on GSB or subgrade causes two problems: (a) **fines pumping** — water from rainfall + capillarity carries fine-grained subgrade up through the GSB into the PQC slab joint, eroding the supporting layer and causing slab deflection / cracking; (b) **moisture content fluctuation** — M-40 concrete cures unevenly when the ground is wet vs dry, causing surface cracks. **Dry Lean Concrete (DLC)** is a M-10 grade low-strength concrete layer that acts as: a) an impermeable barrier that prevents pumping; (b) a uniform, stable platform for the PQC slab to cure on. IRC 58 mandates 100-200 mm DLC sub-base under all PQC pavements.