Concrete
C20 nominal 1:2:4 site-mixed concrete
Nominal 1:2:4 site-mixed concrete for non-designed applications where permitted by the specification.
Methodology
Uses a 1.54 dry-volume factor and 3% batching allowance. Do not substitute for a designed mix where design concrete is required.
Source basis
Residential 1:2:4 methodology normalized to standard volumetric build-up. Sep 2026 audit: cement benchmark updated to Abuja bulk working reference; concrete gang arithmetic corrected.
Quantity basis
See exactly what makes up the rate
The rate is analysed for 1 m³ of work. Enter the quantity you actually want to execute and every material, labour and plant quantity below will scale without changing the public Charismak reference rate.
What you need to buy
Material quantities
Quantities shown are for one unit of the measured work. The right-hand quantity scales automatically to the work quantity you enter.
| Resource | Type | Qty / 1 m³ | Resource unit | Qty / 1 m³ | Unit price | Cost / m³ |
|---|---|---|---|---|---|---|
| 50 kg cement incl. 3% batching allowanceSep 2026 Abuja working bulk reference: ₦12,500/50kg bag; editable. | Material | 6.53 | bag | 6.53 | ₦12,500 | ₦81,563 |
| Sharp sand | Material | 0.44 | m³ | 0.44 | ₦14,400 | ₦6,336 |
| Granite / coarse aggregate | Material | 0.88 | m³ | 0.88 | ₦27,000 | ₦23,760 |
Workmanship
Labour build-up
Labour is shown as the crew, trade, gang-day, day or piecework quantity used to produce one unit of the measured work.
| Resource | Type | Qty / 1 m³ | Resource unit | Qty / 1 m³ | Unit price | Cost / m³ |
|---|---|---|---|---|---|---|
| Concrete gang labour1 concrete mason @ ₦15,000/day + 6 labourers @ ₦8,000/day = ₦63,000/gang-day; output basis remains editable. | Labour | 0.125 | gang-day | 0.125 | ₦63,000 | ₦7,875 |
Equipment and movement
Plant & logistics
Plant, hire, fuel, support equipment and logistics are kept separate so they are not hidden inside the material or labour rate.
| Resource | Type | Qty / 1 m³ | Resource unit | Qty / 1 m³ | Unit price | Cost / m³ |
|---|---|---|---|---|---|---|
| Mixer / vibrator / small plant | Plant | 1 | m³ | 1 | ₦2,769 | ₦2,769 |
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