Category Archives: RCC

Bending moment in over reinforced Beam 

How do I calculate the bending moment in over-reinforced beams? by Santosh Kulkarni https://www.quora.com/How-do-I-calculate-the-bending-moment-in-over-reinforced-beams/answer/Santosh-Kulkarni-37?share=425beba2&srid=zM5g

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Flat slab or PT slabs? 

For a 10 x 4 m RC slab, which is a better option, a PT slab or a flat slab? by Santosh Kulkarni https://www.quora.com/For-a-10-x-4-m-RC-slab-which-is-a-better-option-a-PT-slab-or-a-flat-slab/answer/Santosh-Kulkarni-37?share=06e22f74&srid=zM5g

Footings : Levelling Course & Water Logging :

Dear Friends ,

Let us solve the query of one of the readers today.

This is the query :

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In fact , there are two queries here :

  1. When do we use Plain Concrete in a footing ?
  2. Ground Water seepage during excavation ?

Let us solve these queries one by one.

First query is about the Plain cement Concrete .

Please have a look at the section of the Footing as given in the RCC drawing :

The PCC is marked here with Red :

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Now have a look at the base of a pit . This is how the surface shall be at the base of the excavation :

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It shall be very clumsy to lay the rebars on such a muddy surface. Right ? Thats why we provide a certain thickness of plain cement concrete here . This concrete is also known as the ” LEVELLING COURSE “.

So the Levelling course is a layer of Plain cement concrete which is given so that we get a good working surface for laying the footing properly. 

Now have a look at the leveling course laid on a site :

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Next step is to lay the Rebars of the Footings :

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Parallely , the shuttering for the footing is also fixed on the Levelling course.

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Now we do casting of the Footing so that it becomes the RCC footing .

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Hope the first query is clarified.

Now second query pertains to the Water logging during excavation.

You can have a condition like this on the site :

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So what do we do in such a case ?

Simple.

We have dewatering pumps and take out the water before laying the Levelling course :

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There might be a case like this also :

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So now , may be we shall have to wait for a dry spell so that this water either gets absorbed in the soil below or is evaporated.

In a situation , when the excavated pit is not completely dried, it shall not be possible to lay the plain cement concrete in the mud.

What do we do then ?

In such a case , we shall have to do Boulder solling so that we get a good ,

solid working surface .

Look at the stake of Boulders which are also known as Rubble or Stone :

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These boulders , when laid in the base of a pit , shall look like this :

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After this , the levelling course is laid in plain cement concrete. This is followed by the RCC footing.

Hope both the queries are clarified now.

Thank you for asking the queries .

Blog Stats as on date :

 

What is Bar Bending Schedule ?

Hello Friends ,

The Blog has recently achieved a status of having 850 Followers .

Various Initiatives are regularly planned for the engagement and enlightment of the readers.

One such initiative is ” On Line courses for Civil Engineers ” which have been commenced from Sept 2016.

Many students have benefitted through the Basic Module for construction .

” The On line courses “ is an appropriate medium for learning new concepts or for honing the skills without disturbing the routine activities .

Now presenting the On line course on “BAR BENDING SCHEDULE ” which was requested by many students for some time.
This article explains the course Objectives and other details you would like to know.

Hope you get registered for this course by 15th April 2017 .

Course begins from 20th April 2017.

All the best !

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You can also directly apply through this form below :

 

 

Really?  On line course? 

Hi Friends ,

Good Morning !

Hope you are all enjoying the season !

Have a look at this .

CATALOGUE.OLC.17.03.17. (1)

Look what the students of this course have to say :

One student expressed his joy :

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Another student :

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Look at why the students are joining this online course :

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Some other reactions :

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Another update :

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So, friends …what are you waiting for ?

You can receive  a sample Audio Visual PPT from me by mail so that you can have a feel of how the actual teaching takes place. Also let me know which is your preferred language .

The PPT slides are in English but the commentary can be either in English or Hindi or in Marathi . So that you can easily understand .

Write to me today itself .

You can use the form here for faster communication :

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Santosh Kulkarni shared an answer on Quora with you

How much cement and steel are required for 50×23=1150 square feet and thickness of 4″? by Santosh Kulkarni https://www.quora.com/How-much-cement-and-steel-are-required-for-50%C3%9723-1150-square-feet-and-thickness-of-4/answer/Santosh-Kulkarni-37?srid=zM5g&share=5d914961