READERS :
In case you are puzzled over this factor 2.43 , please this article ;
Thank you
READERS :
In case you are puzzled over this factor 2.43 , please this article ;
Thank you
Dear Friends ,
Let us give a big hand to Mr.Somappa who has joined as the 497th Follower of this blog. He is an old student and has got a rich experience of tunnels and storm water drains .
We need ONLY THREE more followers so as to complete FIVE CENTURIES OF followers.
Today we shall do some work in the Internal Plaster.
We shall find out total cost of the plastering and this we shall do step by step right from scratch.
Keep on reading further !
Dear Friends ,
In the previous article, we planned a water tank .
We arrived at the dimensions of the water tank.
Now let us calculate the total cost for this construction as follows :
THANK YOU SO MUCH
Dear Readers ,
We are meeting after a long gap .
I was occupied in some different priorities during this time.
When one of the students ( who is also a follower to this blog ) asked me about no new post for a long time , I thought I shall immediately post something interesting today.
In our previous articles, we have already covered the basic theory behind using the AAC blocks. [ Read the article here ]
As you know , these blocks , Autoclaved Aerated concrete blocks are quite light in weight.
When you compare the unit weight of AAC blocks @ 600 Kg/cum with that of the red bricks @1900 Kg/Cum, we find that these blocks reduce the dead weight of the building.
These are also faster to build . Whereas we need 510 bricks for 1 cum of brick work, we need only 42 Blocks for 1 CuM of AAC block masonry. Thus, the mason needs to handle only 42 AAC blocks as against 510 bricks.
The mortar quantity is also reduced from 25% in brick work to 4.5 % in AAC block masonry.
Now let us solve one practical example from the site.
Question :
Find out the total material needed to construct a wall using AAC blocks with the following details :
4.Wall dimensions : 5.5 m x 2.9 m x 0.15 m
Solution :
Step 01 : Volume of the masonry wall : 5.5 m x 2.9 m x 0.15 m = 2.3925 Cum.
Step 02 : Materials needed for the Cement mortar CM 1:4 :
Cement : 1.52*28.8 /( 1+4 ) = 8.76 Bags
Sand : 1.52*4 /( 1+4 ) = 1.216 Cu M.* 0.3529 = 0.429 Brass
Step 03 : Volume of 1 block of size 625 mm x 240 mm x 150 mm :
0.625 m x 0.240 m x 0.150 m = 0.0225 cum.
Step 04 : No of blocks in 1 Cum = 1/0.0225 = 44.44 Nos.
Step 05 : Increased dimensions of 1 block due to 5 mm mortar joint :
( 625 +5 ) mm x ( 240 +5 )mm x ( 150+5 ) mm :
= 630 mm x 245mm x 155 mm
Step 06 : Volume of block with mortar :
0.63 m x 0.245 m x 0.155 m = 0.0239 cum.
Step 07 : No of blocks in 1 Cum = 1/0.0239 = 41.84 Nos.= 42 blocks.
Step 08 : Difference in no of blocks due to mortar : 44 -42 = 2 blocks.
Step 09 : Volume of mortar in 1 Cum = volume of 2 blocks = 2 * 0.0225 = 0.045 Cum.
Note : this means 0.045 x 100 = 4.5 % mortar.
Step 10 : Calculate the materials needed for 1 Cum of block masonry :
Blocks : 42 Nos
Cement : 8.76 Bags * 0.045 Cum. = 0.39 bags.
Sand : = 0.429 Brass* 0.045 Cum. = 0.019 Brass
Step 11 : Total material needed for 2.3925 Cum. of masonry :
Blocks : 42 Nos * 2.3925 Cum = 100.485 Blocks = 105 Blocks
Cement : 0.39 bags. x 2.3925 Cum = 0.93 Bags = 1 bag
Sand : 0.019 Brass x 2.3925 Cum =0.045 Brass =0.046 Brass
With this much information , it is also easy to find out the cost of the materials .
Step 12 :
Blocks : 105 Blocks@ 72 per block = Rs.7560
Note :The cost of AAC block is considered @ Rs.3300 per Cum.
Cement : 1 bag@ 300 Rs/bag = Rs.300
Sand : 0.046 Brass@4200 Rs/Brass Rs. 193
Total cost : Rs.7560 + Rs.300 + Rs. 193 = Rs.8053
Cost per Cum = 8053/2.3925 = Rs.3366
Cost per CFt : Rs.3366/35.29 = Rs.95
Hope you are able to follow these steps.
In case of any doubt , please let me know.
All the best !
Dear Reader ,
You shall be glad to know that the much awaited webinars are being organized very shortly.
Just go to the our web site and fill in the registration form.
Here is a link to the web site .
The first webinar shall be organized on :
” How to find out the cost of a RCC box footing ? “
This shall be dealt in very basics .
Background :
It is a common observation that when it comes to calculations , estimation and costing , many people find it rather difficult.
Thats why this topic has been selected so that adequate practice gets done through the webinars.
Dear Reader ,
Good afternoon !
In case you want to read more on Excel , do read these articles :