Today we are going to discuss the rate analysis of concrete along with an example calculation for M25 Concrete. Before that, you must understand the steps involved in rate analysis. We have already discussed the rate analysis basics.
How to do rate analysis for concrete?
To get almost nearby accurate rate analysis, you have to consider the following things,
- Material Estimation
- Labour Estimation
- Power consumption
- Water consumption
- Tools and equipment
- Contingencies
- Overhead & Profit
1. Estimation of Materials
Assume We need 1 m3 of wet volume concrete of M25 Mix, (Mix Ratio, M25 = 1: 1 : 2)
So Total Parts = 1+1+2 = 4 Parts which gives Dry volume that means before adding water content
Volume of concrete = (1 Cement Part)/4 + (1 Sand Part)/4 + (2 Coarse Aggregate Part)/4
Therefore,
- Volume of Cement = 1/4 x 1.55
- Volume of Sand = 1/4 x 1.55
- Volume of Coarse Aggregate = 2/4 x 1.55
- From the IS Code standard, Assuming the water-cement ratio for M20 is 0.5
The reason for that 1.55 has been already discussed in the concrete ingredients calculation topic.
So the required
- Cement Volume – 0.3875 m3 or 11.16 Bags
- Sand Volume – 0.3875 m3
- Coarse Aggregate – 0.775 m3
- Required Water – 193.75 Litres
We have estimated the material requirement.
2. Labour Estimation
As per our Labour Output Thumb Rule estimation. We assume that we need approx manpower in terms of days as below
- Foreman – 0.05
- Mason – 0.3 Day
- Male Coolie – 1 Day
- Female Coolie – 1 Day
- Waterman – 0.1 Day
We had covered the crucial task and we shall add a certain percentage for water, power consumption, etc.,
How do you calculate the rate analysis of m25 grade concrete?
Example Rate Analysis
PARTICULARS | UNIT | QTY | RATE | AMOUNT |
1:1:2 (1 Cement: 1 coarse sand: 2 graded stone aggregate of 20mm nominal size) including curing | ||||
Details of the cost of 1m^{3} of M25 concrete | ||||
Materials | ||||
Cement | Bags | 11.16 | 350 | 3906 |
Sand | m^{3} | 0.3875 | 1800 | 697.5 |
Coarse Aggregate | m^{3} | 0.775 | 1500 | 1162.5 |
Manpower | ||||
Foreman | Each | 0.05 | 800 | 40 |
Mason | Each | 0.3 | 700 | 210 |
Male Mazdoor | Each | 1 | 500 | 250 |
Female Mazdoor | Each | 1 | 400 | 200 |
Waterman | Each | 0.2 | 400 | 80 |
Subtotal | 6546 | |||
Tools & Tackles | 1% | 65.46 | ||
Power Consumption | 2% | 130.92 | ||
Add for sundries & contingencies | 3% | 196.38 | ||
Add for overhead & contractor profit | 15% | 981.9 | ||
Rate per Cu.metre | 7921 |
Hope you’ve learned something new today. Happy Learning 🙂