- 2068 Baisakh (old course) · 4 marks
Rate analysis: 40 mm asphalt wearing coat
Short answer
For 10 m² of 40 mm AC wearing coat, compacted volume 0.40 m³, mix mass 0.92 t at 5.5% bitumen. Quantities: aggregate 0.869 t, bitumen 0.0506 t, tack coat 0.0025 t. Including plant, transport, labour, 15% overhead and 10% profit, rate is NPR 13,974.63 per 10 m² (NPR 1,397.46/m²).
Prepare an analysis of rate for 40 mm thick asphalt concrete wearing coat per 10 m².
Asphalt concrete (AC) wearing coat is a hot-mixed, hot-laid mix of graded aggregate and bitumen. Illustrative rates: aggregate NPR 2,800/tonne, bitumen NPR 95,000/tonne, plant and paver costs as shown, labour NPR 1,500 and NPR 1,100 per day, overhead 15%, profit 10%.
Quantities per 10 m²
- Compacted volume m³; density of compacted mix t/m³; mass of mix t
- Bitumen content 5.5% of mix t; aggregate t
- Tack coat 0.25 kg/m² kg per 10 m²
Analysis
| Item | Qty | Unit | Rate (NPR) | Amount (NPR) |
|---|---|---|---|---|
| Coarse + fine aggregate (graded) | 0.869 | tonne | 2,800.00 | 2,433.20 |
| Bitumen 60/70 (5.5% of mix) | 0.0506 | tonne | 95,000.00 | 4,807.00 |
| Tack coat bitumen (0.25 kg/m²) | 0.0025 | tonne | 95,000.00 | 237.50 |
| Hot-mix plant (heating, fuel, mixing) | 0.920 | tonne | 1,200.00 | 1,104.00 |
| Transport of mix, paver and rollers | 0.920 | tonne | 900.00 | 828.00 |
| Skilled labour | 0.30 | day | 1,500.00 | 450.00 |
| Unskilled labour | 1.20 | day | 1,100.00 | 1,320.00 |
| Direct cost | 11,179.70 | |||
| Contractor's overhead @ 15% | 1,676.96 | |||
| Contractor's profit @ 10% | 1,117.97 | |||
| Total (rate per 10 m²) | 13,974.63 |
Rate = NPR 13,974.63 per 10 m² (NPR 1,397.46 per m²).
✓ Answer checked by Claude Opus 5.5 (high effort)
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