Question
Flenn Hale
Construction Manager
Asked a question 2 years ago

Rate analysis concrete block of size 30cm*20cm*15cm of ratio 1:2:4

Rate analysis for block size 30cmx20cmx15cm with mortar ratio of 1:2:4 including labour cost

Where am I?

Terry Collins
Sustainability consultant

Are you asking for The rate of Concrete block or The rate of different items like cement, sand, aggregate?

Rate analysis of concrete block: Important points :

Rate analysis is done for cement mortar in such a way that the quality of cement and sand required for the 1-metre cube of concrete is find out and the sand requirement a for 1-metre cube for various proportions that is 1:2, 1:4, 1:6, 1:8, etc. 1.3-metre cube of cement and sand is required for the 1-metre cube of wet cement mortar because there is the presence of voids in the sand in a dry state.

Tools for cement mortar and Labour estimation :

Semi-skilled labour as are essential for 1-metre cube cement mortar preparation Works are done by labour hour mixing for 0.2 7days

Important note :

Very high charges for the mechanical mixer is to be taken in in a lump sum for mixing 1-metre cube of mortar.

Thank You.

Rate analysis: Rate analysis will simply the quantity of cement and sand required for the 1-meter cube of cement sand mortar.

Similarly, we can do rate analysis for concrete as well for different proportions.

Here I am discussing point example of the material required for the 1-meter cube of cement concrete of density 2.3 ton per metre cube and cement sand aggregate ratio is 1:3: 6

Mix proportion ratio is 1:3:6 (here, maximum 20 nominal sizes of aggregates are used.)

The total sum is 1+ 3 + 6=10 Dry volume of 1-metre cube concrete is a 1.54-metre cube.

Hence cement required is a one-tenth part of the 1.54-meter cube which is 0.15-metre cube means to 16 kg means 4.3 bags of 50 kg each.

If you want to find out the sand quantity then it's 0.46-meter cube means 1.2-ton Aggregate quantity 0.92-metre cube means 1.56 ton of maximum normal size of 20 mm aggregate

I hope so your doubt is clear, thank you.