Oer Rcc Work

7/30/2019 Oer Rcc Work

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NIOS OER Project

OER Frame work(Draft)

Name of OER Developer : Mr.Kisan Suresh Pande

Institution : Lokmanya Public Charitable Trust , Chikhalgaon,Tal-Dapoli,Dist-Ratnagiri.41571

E mail : [email protected] Mobile No. 9404155023 Tel. No.(02358)686985

Course : Rural Technology Standard : 8th to 10th

Subject : RCC Construction

Concept and Concept map:

Use of Tools &material

StrengthWhat is Rcc ?

What is mean by concrete? Types ofstructure

Cement Sand Stone

metal

ScaleUse

Slab Beam Colums

Foundation

BenefitsBenefits

RCC WorksRCC Works


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Activity to be Performed with this OER

Activity to be performed mentioned in PowerPoint Link below

Please click here for the link to the presentation on preparing RCcolumns

The column prepared should look as shown in figure

Till here what you learnt

Equipments used in RCC construction

Preparation of concrete mixture

How to Make a RCC structure

How to Make columns, and curing process

Activity to Perform

To make 2 RCC Columns for a school gate
http://www.slideshare.net/vigyanashram/prepare-rcc-columnshttp://www.slideshare.net/vigyanashram/prepare-rcc-columns


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Objective of this OER

After going through this unit ,the learner will be able to:

1) Identify deferent types of Construction structure

2) Identify structural components of RCC.

3) Do RCC work.

4) Drawing sketches of beams and columns on paper or on Computerusing respective softwares

Introduction

Construction carries important place in human civilization. It shows us theprogress made by man from time to time. The first buildings made by humanwere simple huts, tents Wood, stones and sands were the only material used.

The first bridges made by humans were probably wooden logs placed across stream.

In the ancient time architects put all their skill in building the roof of thconstruction. They construct walls and roofs using stones. Still we can see thstony beam on the stony column in old temples.

The knowledge gained over 5000 years ago is still used in the construction every building in the world. Ancient architects were constructing large building

with the help of Lime stones ( in Hindi or in Marathi), stones, anearthen materials etc.Today Steel, cement etc material is available for architects to construct bbuildings and large bridges.

History of ConstructionConstruction has a long tradition of thousands of years. To become immortal i

history, Kings asked their architect to construct huge buildings.

Pyramids were build to bury pharaohs king around 5000 years ago. Height of thpyramid is approximately 300 feet and was built with 5-6 feet rectangular stoneThose architects showed their skill of building such huge, accurate constructioPyramids are one of the Seven Wonders of the World.In India, Kailash temple at Ellora (Dist Aurangabad) is built from huge stones in 7 13th centuries

Beams and Arches


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Stones are weak in tension therefore in old temples you will find column arplaced close to each other. Construction of big hall was not possible with stoneas beam.When man learnt to built arch by arranging the stones, ample progress was madin the construction process. By using this method, Roman people showed thecreativity in construction. In stony roof and beams, pressure comes on the beamdue to the weight of the roof and it bends at the center. Therefore limite

distances were kept between the two beams. In case of circular arches, pressuris equally distributed and hence we can keep more distance between thcolumns. In elliptical arches we can increase this distance further and caconstruct the stony concave roof.

TrussesPeople realized that wood and steel can bear the tension & pressure easilTherefore, use of Wood and steel started in construction.Architects recognized importance of triangular frames in construction. Triangulaframes are stronger than square or pentagon frames. Therefore architects startemaking the truss for the roof by joining different sized triangles for small house

People started using roof tiles on this truss with the support of vertical anhorizontal planks. Afterwards method of putting steel or cement sheets on throof got developed.

Picture of a 400 year old bridge on Koyna river between Pratapgad anJawali using arcs.Picture taken in May 2012

Types of Construction

Types of Construction are as follows

1) Wall bearing - In this type, all load of roof and structure is carriedthrough the walls towards the foundation

2) RCC -RCC means Reinforced Cement Concrete


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In an RCC framed structure, the load is transferred from a slab to thebeams then to the columns and further to lower columns and finally tothe foundation which in turn transfers it to the soil. It is shown in thefigure below where the slab load is distributed to the ground surfacethrough the pillars. The Ground Surface is digged out and concrete,sand and cement mixture layer is filled in it to assign strength to thebase

Most of the high rises building uses RCC techniques.

3) Peb(Pre-engineered Building) -

In this type of construction,a solid model structure is prepared andassembled.Advantages if this type of building is that its components areasily available which are metallic/fiber/toughened glass.It needs tomake a strong ground base preparation like RCC and further, metalliccomponents are assembled by nuts bolts and welding.Almost allshopfloors , workshops of manufacturing units are of this type

Image of a Pre engineered Building


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Powerpoint Links

Please click here for link on presentation for types of construction

Please click here for link on presentation on structural elements

Activity

Visit an construction site nearby your locality and find out how the typeof construction whether it is RCC or Wall Bearing or PEB

Calculate dimension of column and beam

Draw Sketch of Beam and Column

Explore more on chemical composition of cement. Explore more onMortar and Mortar strength standards

Questions

Where is steel used in construction , why is cement used in constructio

Please refer to the photographs below and identify which type ofconstruction is it
http://www.slideshare.net/vigyanashram/types-of-construction-25907371http://www.slideshare.net/vigyanashram/structural-elementshttp://www.slideshare.net/vigyanashram/types-of-construction-25907371http://www.slideshare.net/vigyanashram/structural-elements


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Mortar ratios for different types of work

The ratio of Mortar/Concrete required for variable work:Following is the ratio of cement : sand : gravel for construction.

Type of Work Proportion of Cement : Sand : Gravel

1. Water tank 1:3

2.Bricks work (burnt) 1:6

3.Steps construction(stony) 1:7

4. Finishing 1:2 ( or cement + water)

5. Wall construction 1:3:6

6. Making foundation 1:3:6 or 1:3:5

7.R.C.C. column or beam 1:2:4

8.Handpump foundation 1:2:4

Mortar ratio is important because those are tested and standardized quantities through whicwe can ensure the appropriate strength of the structure


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Additional PowerPoint links to structures, bars and forcescalculations

Please click here for PowerPoint link on load calculations on structures, bars and forces applied

Please click here for PowerPoint link on load calculations onstructures

Summary

From this topic, the learner is well familiar with

Which type of materials to use according to the type of construction

Knowledge of RCC construction

Knowledge of proper Mortar ratio according to work

Questions

What is difference between RCC and Wall Bearing?

What is beam and concrete

Additional Activity

1) Prepare Side pillars of school building gate using RCC

2) Costing Assignment

Sunil wants to do fencing along his house.He require 20 concrete polesof dimensions 120x20x5 . Calculate the cost for making the 20poles of concrete
http://www.slideshare.net/vigyanashram/structures-bar-forces-and-sheltershttp://www.slideshare.net/vigyanashram/structures-load-calculations-sheltershttp://www.slideshare.net/vigyanashram/structures-bar-forces-and-sheltershttp://www.slideshare.net/vigyanashram/structures-load-calculations-shelters


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Disclaimer:The content displayed in the presentation is made for students, teachers and volunteers of Vigyan Ashram for learning Rural Technologies. They have

made extensive use of web resources while making the presentation .They are instructed to use open source content on the website

Material shared is for educational purpose and no commercial transaction is involved

Vigyan Ashram is not responsible for any omission or misrepresentation of information. We will be happy to do correction if it is brought to our notice

Oer Rcc Work

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