Why a concrete cube is NOT tested when wet ?

Dear Friends ,

Have you ever wondered on this issue ?

” What happens if we test a wet cube in a compressive strength testing machine?”

Would you not like to find out what shall heppen if we do not dry the concrete specimen after 28 days and just test it under the same wet condition ?

You can find out the correct answer at this link :

https://www.quora.com/What-happens-if-we-test-a-wet-cube-in-a-compressive-strength-testing-machine-What-will-be-the-result-compared-to-a-dry-cube/answer/Santosh-Kulkarni-37?share=6e16e2d2&srid=zM5g

By the way , how many of you have actually seen the concrete cubes being cast at site ?

Not seen ?

Well, here is the link for you to watch the cubesbeing cast at site for testing :

Concrete cubes being cast 

After the 6 cubes are cast on the day of the concrete, 3 cubes are tested on the 7th day      [ Should not give a strength less than 65% of the characterstics strength ] and remaining 3 cubes are tested on the 28th day.[100% of characterstics strength].

Would you like to see how the concrete cubes are actually tested in the laboratory ?

Here is the link for you :

Testing of concrete cubes :  

Hope you are enjoying reading this blog.

If you have any suggestions , please write to me using this form :

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Can we safely have a terrace garden ?

Dear Friends,

You must have seen a few terraces with beautiful gardens on it . Right ?

The plants, the pots and the soil at the terrace needs a careful planning at the time of design of the building. You must inform to the structural consultant about your future plans.

The terrace slab may not have been designed to withstand the excessive loads occuring due to the garden plants.

This question often comes to owners mind :

” How much weight can a 2nd floor terrace with 700sq feet can withstand? I want to build a terrace garden “

Read my answer below to understand this issue properly :

https://www.quora.com/How-much-weight-can-a-2nd-floor-terrace-with-700sq-feet-can-withstand-I-want-to-build-a-terrace-garden-with-a-4-feet-height-and-a-2-feet-diameter-metal-drums-with-sand-How-many-drums-can-I-use/answer/Santosh-Kulkarni-37?share=554b7dc0&srid=zM5g

Thank you so much

By this time I am sure you must subscribed to my You tube channel.Right ?

If not already subscribed , why not do it just now ?

here is the easy link for you :

My You tube channel

Bye Bye

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What is weight of Sand per cum ?

Dear Friends ,

You are surprised at this simple question ?

Sometimes such very earthly and common questions can also stump you out during the interview. You should not take such questions lightly .

What is the weight of one cubic meter of sand?

By the way do you know the answer ?.

If you dont know , why not read the correct answer on this link here :

https://www.quora.com/What-is-the-weight-of-one-cubic-meter-of-sand/answer/Santosh-Kulkarni-37?share=3995b15b&srid=zM5g

By the way , do you know , how much ingredients need to be taken for the concrete ?

First you should see this video. This explain what is the meaning of the term grade and it also explains how to convert a grade into the proportion of materials :

Grade to ratio conversion

Then you would like to see the calculations for finding out the materials for 1 cum of concrete :

How to find the Materials for concrete

If you know all this but are not aware as to what is meant by the grade of cement , then you must also see this video :

What is the grade of cement ?

Ok then friends, please see these videos and upgrade or refresh your skills.

If you have not yet subscribed the You tube channel , please do subscribe it today itself.

This is the link for you :

You tube channel

Take care and have a good night.

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Materials needed for M40 concrete ?

Dear Friends ,

You  are able to answer this question ?

The prestressed slab you are seeing in this picture is of Grade 40.

We have seen this earlier . Right ?

Thats why it is necessary for you to keep referring to your notes on a regular basis always.

Any way , if you would like to find out How much cement, sand, and aggregate were required for an M 40 grade with a 30% replacement of fly ash , you can read my answer on this link :

https://www.quora.com/How-much-cement-sand-and-aggregate-were-required-for-an-M-40-grade-with-a-30-replacement-of-cement-with-fly-ash/answer/Santosh-Kulkarni-37?share=a5efa25a&srid=zM5g

And , by the way , do you know , would like to learn how to find out how much ingredients for the concrete once again ?

First you should see this video. This explain what is the meaning of the term grade and it also explains how to convert a grade into the proportion of materials :

Grade to ratio conversion

Then you would like to see the calculations for finding out the materials for 1 cum of concrete :

How to find the Materials for concrete

If you know all this but are not aware as to what is meant by the grade of cement , then you must also see this video :

What is the grade of cement ?

Ok then friends, please see these videos and upgrade or refresh your skills.

If you have not yet subscribed the You tube channel , please do subscribe it today itself.

This is the link for you :

You tube channel

Take care and have a good night.

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What to do with the old foundation ?

Dear Friends ,

you shall come across this question whenever you are developing a property. Suppose you have purchased an old building . You have now dismentalled the building.

Now question is what is to be done for the footings of the old building ?

Can these be used again in the new construction ?

Or these need to be demolished and start with a properly designed foundation ?

This is a very tricky question to answer.

If we want to start construction in an area that previously has a building, what should we do about the footings of the old building ?

Right ?

You can read through my thoughts on this question at the following link :

https://www.quora.com/If-we-want-to-start-construction-in-an-area-that-previously-has-a-building-what-should-we-do-to-the-foundation/answer/Santosh-Kulkarni-37?share=042b392f&srid=zM5g

hope you are able to understand my view points.

Thanks

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How many bricks for this volume ?

Photo0522.jpgDear Friends ,

You must be now ready to face Such questions .

These questions might be asked to you during the interview or may be you are required to calculate such a quantity at your site.

Both the cases , you must be able to get the correct answer or you are in loss of reputation.

First try to give answer to this question yourselves :

How many bricks are required for 1 cubic feet? 

Could you find out ?

Now ,check your  answer at this link :

https://www.quora.com/How-many-bricks-are-required-for-1-cubic-feet/answer/Santosh-Kulkarni-37?share=d327f095&srid=zM5g

Bye the way , you can also go through the following videos so that your basics about the masonry are refreshed :

AAC blocks Masonry 

Materials for Brick Masonry

Volume of brick work

Brick work in progress 

In case you would like to have some clarifications on the various videos, do let me know through this form here :

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Great videos which you shall like…

Hello Friends ,

Hope you are all doing fantastic.

Thank you so much for your fabulous response to my appeal.

You have started subscribing to my you tube channel and this is the result as on date :

3.GIF

Those of you who have not yet subscribed to my You tube channel can now subscribe using this link here :

Santosh Kulkarni

Today , let me share with you ready links for certain specific videos which shall be of great interest to you :

  1. Checking of plumb before casting : In this video , I have explained how to check the plumb on the form work for the RCC column which is to be cast . In the same video , the exact steps during the de-shuttering of the RCC column are also explained. Please have a look at this video at this link :                                                                      Plumb Checking 
  2.  RCC matt foundation : This video , I have explained the basic composition of a RCC matt foundation. The box type waterproofing, PCC and RCC raft have been explained. the rebars have been shown in detail here :                                                         RCC matt foundation  part 01 
  3. In the second part of this video , the completed matt foundation has been explained. You can also see the tie beams here , which are important for any earthquake resistant building :

          RCC matt foundation part 02

You can visit these links at your convenience and take a further step towards learning.

Bye

 

SANTOSH KULKARNI

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