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Cost of M20 PCC for RCC column

Short answer

M20 concrete (1:1.5:3) manual mixing, dry volume factor 1.54: per m³ requires 8.06 bags cement, 0.42 m³ sand, 0.84 m³ aggregate, labour. Direct cost Rs 19,044 + 15% = Rs 21,900.60/m³. Column volume 0.36 m³, cost Rs 7,884.22 excluding formwork, reinforcement, VAT.

Find out the cost of M 20 PCC for RCC work for column of size 0.3 m × 0.3 m and 4 m long using analysis of rates for manual mixing.

Basis

M20 concrete has the nominal mix 1:1.5:3 (cement : sand : 20 mm aggregate), as per IS 456 Table 9 for nominal mixes. Mixing is by hand (manual). Dry volume of materials = 1.54 x wet volume. "PCC for RCC work" here means the concrete only; formwork and reinforcement are paid separately. Rates are illustrative.

Quantities per m³

Sum of ratio = 1 + 1.5 + 3 = 5.5; dry volume = 1.54 m³.

  • Cement = 1.54 x 1/5.5 = 0.2800 m³ = 403.2 kg = 8.06 bags.
  • Sand = 1.54 x 1.5/5.5 = 0.4200 m³.
  • Aggregate = 1.54 x 3/5.5 = 0.8400 m³.

Rate analysis (per m³)

DescriptionQtyUnitRate (Rs)Amount (Rs)
Cement (0.280 m³ x 1,440/50)8.06bag900.007,254.00
Sand (0.420 m³)0.42m³2,500.001,050.00
Coarse aggregate 20 mm (0.840 m³)0.84m³3,500.002,940.00
Mason (skilled)1md1,200.001,200.00
Labour for hand mixing, placing, curing (unskilled)7md900.006,300.00
Water, curing, tools (L.S.)1L.S.300.00300.00
Sub-total19,044.00
Contractor's overhead and profit15%2,856.60
Rate per m³21,900.60

Cost of the column

Volume = 0.3 x 0.3 x 4 = 0.36 m³.

Cost = 0.36 x 21,900.60 = Rs 7,884.22.

Answer: Rate of M20 concrete = Rs 21,900.60 per m³; cost of the 0.3 m x 0.3 m x 4 m column concrete = Rs 7,884.22 (excluding formwork, steel and VAT).

✓ Answer checked by Claude Opus 5.5 (high effort)

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