Reinforcement bar

Welcome To The Presentation Based On

REINFORCEMENT BAR

Course No –CE 208

Course Title– Quantity Surveying

Course Teacher- Safiqul Islam Sajib

Presented by-

Md. Mohotasimur Rahman

ID#10.01.03.040

INSTRUDUCING STEEL

Commercial iron

,containing Carbon

in any amount up

to about 1.7

percent.Steel in rack

TYPES OF STEEL

Depending upon the percentage of

carbon, four grades of steel are –

Soft, Mild or Low 0.05-0.15%

Medium carbon steel 0.15-0.30%

Medium high carbon steel 0.30-0.60%

High carbon steel 0.60-1.50%

INTRODUCING MILD STEEL

There are four type of steel

1. M.S. Angles

2. M.S. Channels

3. Plain Bars

4. Deformed Bars

DEFORMED BAR AND TOR STEEL

Deformed bar Tor Steel

DIFFERENCE BETWEEN TOR STEEL

& DEFORMED BAR

Deformed bars save in

steel & lower

construction cost.

The Ultimate Strength

of both Grade 60 &

Grade 40 Deformed

bar is minimum

90,000 PSI & 70,000

PSI respectively

Tor Steel has higher

construction cost.

By twisting Tor-Steel

gains Yield Strength of

Grade 60, but the

Ultimate Strength

remains at 70,000 PSI,

which is only equal to

Grade 40

STEEL MANUFACTURING

COMPANY IN BANGLADESH

Bangladesh have world class Steel

manufacturing companyies–

1) BSRM (Bangladesh Steels Re-Rolling Mills)

2) KSRM (Kabir Steels Re-Rolling Mills)

3) RSRM (Ratanpur Steels Re-Rolling Mills)

4) AKS (Abul Khair Steel Mills)

5) Anwar Ispat ltd.

6)GPH Ispat

7)BSI (Baizid Steel Industries )

PRODUCTS MANUFACTURING BY

BANGLADESHI COMPANY

All steel company in Bangladesh

produce Grade 40 HSD Re and Grade

60 HSD Re.

Some company produce some extra

products like BSRM has

BSRM Xtreme500W, KSRM has

KSRM500W, AKS has AKS TMT bar etc.

These bar’s Grade 72.5 HSD Re.

DIFFERENCE BETWEEN GRADE 60 HSD-Re &

GRADE 40 HSD-Re

GRADE 60 HSD Re GRADE 40 HSD Re

Yield strength :60,000 PSI

Ultimate strength :90,000

PSI

Yield strength :40,000 PSI

Ultimate strength :60,000

PSI

Str

ess

Strain

Stress vs Strain for Prime 40

Str

ess

Strain

Stress vs Strain for AKS Grade 60

Tension test Result of AKS Grade 60 & Prime

Grade 40 was Tested in AUST laboratories

APPLICATION OF GRADE 60 AND

GRADE 60 BARS

Grade 60

High way road

culverts, bridges &

flyover.

High rise building

Heavy load

bearing machinery

foundation

Grade 40

Pile works

lintel

Falls wall

Now -a –days this

grade deformed bar

is not available is

high rise buildings

GRADE 60 AND GRADE 40 BARS

Grade 60 Grade 40

GRADE 72.5 HSD Re

AKS TMT bar, BRSM Xtreme 500W, KSRM

500W Q&T have the yield strength

72,500 PSI.

TMT means thermo-mechanical

treatment and Q&T means Quenching

and tempering. By this technology AKS

TMT bar, BRSM Xtreme 500W, KSRM

500W Q&T are produced.

GRADE 72.5 HSD Re

AKS TMT bar BRSM Xtreme 500W

KSRM 500W Q&T

U.S. IMPERIAL SIZES

Bar

Designa

tion (#)

Nominal bar dia Nominal weight

inch mm lb/ft Kg/m

3 0.375 9.52 0.376 0.560

4 0.500 12.70 0.668 0.944

5 0.625 15.88 1.043 1.552

6 0.750 19.05 1.502 2.235

7 0.875 22.22 2.044 3.042

8 1.000 25.40 2.670 3.973

9 1.128 28.65 3.400 5.059

10 1.270 32.26 4.303 6.403

STRENGTH OF MATERIALS

LABORATORY REEPORT

Thanks for your

co- operation