Reinforcing Steel1

8/7/2019 Reinforcing Steel1

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PRESENTED BY:Vishal Bhongale 241023

Anil Bhuse 241025Rajesh Dighewar 241044Sujit Hedulkar- 241057Nilesh Jagadale 241059

REINFORCING STEEL


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Steel was discovered by the Chinese in 202 BC.

Around 9th century AD, the smiths in the Middle East developed techniques toproduce sharp and flexible steel blades.

In the 17th century, smiths in Europe came to know about a new process ofcementation to produce steel.


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Long-term corrosion resistance.

Excellent prevent to salt damage.

Excellent impact resistance, bendability andadhesion.

Excellent bond strength to concrete.


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Construction of roads and Railways.

Buildings.

Stadiums and skyscrapers

Bridges and airports.

Structure supported by a steel skeleton.

Offshore construction


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GLOBAL STEEL PRODUCTION


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STEEL AUTHORITY OF INDIA

RASHTRIYA ISPAT NIGAMLTD. (RINL)

HINDUSTAN STEELWORKS

CONSTRUCTION LTD. (HSCL)

MECON LTD.


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TATA STEELLTD.

ESSAR STEELLTD. (ESL)

JSW STEELLTD.

ISPAT INDUSTRIES LTD. (IIL)


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COMPANY PRODUCTION INSTEEL

MARKETSHARE

SAIL 13.5 32%

TISCO 5.2 11%

RNIL 3.5 8%

ESSAR 8.4 19%

OTHERS 14.5 30%

TOTAL 45.1 100%


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Field Test Details Required Details

1) TOR Steel TOR Marking Should be Rolled onevery Mtr. Length.

2) Pitch Of Twist Bar 8 to 12 times of nominal Dia. In MM.

3) Colour Steel Grey

4) Rusting No Rusting

5) Bending test for Hardness Smoothly Bend & not Develop anyCracks while bending

6)Length Of bar 11 to 12 m/Bar


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Sr.No

Laboratory Test Relevant I.S.Code PhysicalRequirement

1) Elongation 1786-1979(2nd Revision)

Not Less than 14.5%

2) 0.2%Proof Stress 1786-1979(2nd Revision)

Not Less than415 N/mm2

3) Tensile Strength 1786-1979 Minimum 15%More than theActual 0.2%Stress


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Components Load frame

Load Cell-for measuring the load Cross head-controlled to move up

or down.

Extensometer

Output device-dial or digital displays


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Tensile Test In this method and increasing load is applied to

the specimen at a uniform rate.

The load at which there is a halt or hesitation of theload indicating pointer is noted and termed theyield point.

The stress at this point is computed and termed the

yield stress. Calculate the yield stress by dividing the load at

the yield point by the nominal cross-sectionalarea of the test specimen


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Elongation Fit the ends of the fractured specimen together

carefully and measure the distance between the

gage marks to the nearest 1/8" (0.32 cm). The elongation is the increase in length of the

gage length, expressed as a percentage of theoriginal gage length.

In reporting elongation values, give both thepercentage increase and the original gagelength.


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Reinforcing Steel1

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