What is Rate analysis?
Rate analysis is the calculation of all costs of materials used for the construction of the concrete structure in the field of civil engineering.
Rate analysis is done before construction of the structure like a building, bridge, culvert, or road to get the approximate cost of full construction.
If we want to do the rate analysis for concrete then, we have to calculate the cost of all ingredients like cement, sand, aggregate, and steel used in the concrete. Besides this, we should also calculate the mason cost, mazdoor cost, labor cost, etc.
Purpose of rate analysis
The Purpose of rate analysis is to know the Unit cost of doing particular work or Project.
It is important to plan or to allocate the budget for the project. Hence rate analysis helps us to know the project cost and Budget to plan.
Data required to Rate analysis for Concrete
- Materials like cement, sand, and aggregate
- Steel
- Workmanship like mason, labour
- Shuttering charge
- Water charge
Now let us take an example of question for Rate analysis for Concrete
Q) Calculate the rate analysis of 10 meter cube of concrete. The concrete mix is M15.
Solution,
Step -1 Write all the known values of the materials
Here we should know that,
Total Concrete = 10 m3
M15 means the ratio of ingredient in concrete shoud be (Cement:Sand:Aggregate) = (1:2:4)
Density of cement = 1440 kg/m3
Density of steel reinforcement = 7850 kg/m3
Step -2 Calculate dry volume of concrete
For 10 Cubic meter concrete mix,
Total Dry volume = 10 + 52 % 0f 10 { We can take from 50% to 55% of additional volume of concrete to get dry volume}
= 15.2 cubic meter
Given, the mix ratio is 1:2:4
Let the quantity of cement be = x cubic meter
quantity of cement = 2x cubic meter
quantity of cement = 4x cubic meter
Step -3 Calculate volume of all materials
Then,
x + 2x + 4x = 15.2 cubic meter
7x = 15.2 cubic meter
x = 2.17 cubic meter
x = 2.2 15.2 cubic meter Approx.
Therefore Volume of cement = x = 2.2 cubic meter
Volume of Sand = 2x = 2 x 2.2 = 4.4 meter cube
Volume of Aggregate = 3x = 3 x 2.2 = 6.6 meter cube
Step -4 Convert volume of cement into numbers of bags
Now let us change the volume of cement into numbers of bags.
First of all change the volume of cement into weight i.e Kg.
So, weight = Volume x Density = 2.2 x 1440 = 3168 kg
Divide the total weight by 50 to get numbers of bags of cement.
So, numbers of bags of cement = 3168/50 = 63.64 bags = 64 bags Approx.
Step- 5 Calculate weight of steel rod
Now let us assume the 1% of steel has used in the concrete.
Then, 1 % of concrete volume becomes 0.1 meter cube of steel.
Therefore,
Weight of steel rod = volume x density = 0.1 x 7850 = 785 kg.
At last you can add water charges which is about 1.5% of total cost of the concrete.
and 10% contractors charges. If you are calculating for tenders.
Read Also, Easy way to calculate unit weight of steel rod
Table of Rate analysis for Concrete
| Particular | Quantity | Rate | Cost |
| Materails | Rs. | ||
| Aggregate Sand Cement Steel Binding wires | 8.8 m3 4.4 m3 64 Bags 7.85 Quintal 1.5 Kg | 2500 per m3 2400 per m3 350 per Bags 4400 per Q 65 per Kg | 22000 10860 22400 34540 97.5 |
| Sub Total :- | 89597.5 | ||
| Labour | |||
| Mistri Mason Mazdoor | ½ no. 3 no. 12 no. | 500 per day 400 per day 300 per day | 250 1200 3600 |
| Sub Total:- | 5050 | ||
| Binding, Cutting and Bending | |||
| Blacksmith Mazdoor | 8 no. 8 no. | 300 per day 250 per day | 2400 2000 |
| Sub Total:- | 4400 | ||
| Shuttering Timber and Planks | Lumsum | 1000 Rs. | 1000 |
| Carpenters | 10 no. | 280 no. | 2800 |
| Total Amount:- | Rs. 103,147.5 |
Rate analysis for Concrete Calculator
I hope this article remains helpful for you.
Happy Learning – Civil Concept
Contributed by,
Civil Engineer – Ranjeet Sahani
Read Also,
Bar bending schedule for footing- Step by Step Procedure to Calculate
Dowel bars and Tie bars – Application and Installation and Advantages
Calculate weight of steel bar | Quantity of steel bar in circular slab
