- 2081 Bhadra · 7 marks
Cost of PCC at remote site (Bajhang)
Short answer
Assuming a 1:2:4 PCC mix, cement cost at site after 100 km carriage is Rs 850 per bag. For 1 m3, 6.34 bags cement, 0.44 m3 sand, 0.88 m3 coarse aggregate are needed. Direct cost is Rs 12,629; with 15% overheads, rate is Rs 14,523.35.
A structure is to be constructed in Bajhang district with Plain Concrete Cement (PCC) work. The fine aggregate and coarse aggregates are available locally @ Rs 2000/m³. Cement is not locally available, so it has to be bought from nearest market 100 km away from site. The cost of cement in nearest market is Rs 600 per bag and carrying cost is Rs 0.05/kg/km. Find out the cost of the 1 cum PCC work at that place if skilled and unskilled manpower required for PCC work per cum is 1 & 4 md with 1000 & 900 daily wages respectively.
Assumption
The mix of the PCC is not given; the usual nominal mix 1:2:4 (M15) is assumed. Dry volume = 1.54 m³ per m³ of concrete.
Cost of cement at site
Carriage = 0.05 Rs/kg/km x 50 kg x 100 km = Rs 250 per bag. Cement at site = 600 + 250 = Rs 850 per bag.
Quantities per m³ of PCC (1:2:4, sum = 7)
- Cement = 1.54/7 = 0.2200 m³ x 1,440/50 = 6.34 bags
- Sand = 1.54 x 2/7 = 0.440 m³
- Aggregate = 1.54 x 4/7 = 0.880 m³
Cost of 1 m³ PCC
| Description | Qty | Unit | Rate (Rs) | Amount (Rs) |
|---|---|---|---|---|
| Cement (0.2200 m³) at site (600 + 250 carriage) | 6.34 | bag | 850.00 | 5,389.00 |
| Sand (0.440 m³), local | 0.44 | m³ | 2,000.00 | 880.00 |
| Coarse aggregate (0.880 m³), local | 0.88 | m³ | 2,000.00 | 1,760.00 |
| Skilled labour | 1 | md | 1,000.00 | 1,000.00 |
| Unskilled labour | 4 | md | 900.00 | 3,600.00 |
| Direct cost | 12,629.00 | |||
| Contractor's overhead and profit (if added) | 15% | 1,894.35 | ||
| Rate with overhead and profit | 14,523.35 |
Answer: Cost of 1 m³ of PCC (1:2:4) at the site = Rs 12,629.00 (direct cost); with 15% overhead and profit the rate = Rs 14,523.35.
✓ Answer checked by Claude Opus 5.5 (high effort)
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