Sekhar Frc Report

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    A REPORT ON TECHNICAL SEMINAR

    Submitted in partial fulfillment of the requirements for the award of

    BACHELOR OF ENGINEER

    In

    CIVIL ENGINEERING

    By

    B. CHANDRA SEKHAR

    BE 4/4 CIVIL-A2

    1601-11-732-317

    Under the uidan!e of

    FACULTY OF CIVIL ENGINEERING DEPARTMENT

    CBIT-HYDERABAD

    DEPARTMENT OF CIVIL ENGINEERING

    CHAITANYA BHARATHI INSTITUTE OF TECHNOLOGY

    "#$%&'B'$- '($"&' )&'$%S"

    1

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    CHAITANYA BHARATHI INSTITUTE OF TECHNOLOGY

    Gandi!"# H$d!%a&ad-'((()'

    DEPARTMENT OF CIVIL ENGINEERING

    ' &eport on te!hni!al Seminar *ondu!ted by the $epartment of *i+il %nineerin,

    *haitanya Bharathi Institute of e!hnoloy, "yderabad as a part of *urri!ulum for B.% //

    2ndSemester. IB%& &%I(&*%$ *(*&%%4 is the title of the &eport )resented.

    Submitted By

    B. *handra Se5har 160111732317

    2

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    D E C L A R A T I O N

    I hereby de!lare that the &eport of the Seminar entitled IB%& &%I(&*%$

    *(*&%% whi!h is bein submitted to the *BI in partial fulfillment of the

    requirements for the award of the Ba!helor of %nineer in the *i+il %nineerin is a

    report of the wor5 !arried out by me. he material !ontained in this &eport has not been

    submitted to any Uni+ersity or Institution for the award of any other !ertifi!ate or deree.

    B. *handra Se5har.

    $epartment of *i+il %nineerin

    )la!e *BI-"#$%&'B'$

    Da"!* 4-2-2(+'

    3

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    C E R T I F I C A T E

    his is to !ertify that the &eport of the te!hni!al seminar entitled IB%& &%I(&*%$

    *(*&%%4 submitted by B. *handra Se5har, bearin roll number 1601-11-732-317 as

    the re!ord of the wor5 !arried out by him.

    ,,,,,,,,,,,,, ,,,,,,,,,,,,,..

    Fa"$ in 0a%1! P%3.P.S%!!nia5 Sa%6a

    T!0nia S!6ina% P%3!55% and H!ad

    D!a%"6!n" 3 Cii En1in!!%in1 D!a%"6!n" 3 Cii En1in!!%in1

    CBIT-HYD CBIT-HYD

    4

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    ACKNO7LEGDEMENT

    It is our pri+ilee to than5 the )rin!ipal Sri B. *henna5esha+a &ao Sir and the "ead of the

    $epartment, )rof. Sri ).Sreeni+as Sarma Sir.

    8e would li5e to e9press ratitude to 'sst. )rof. Sri :.Sambasi+a rao Sir for uidin and

    helpin us in this te!hni!al seminar.

    I would li5e to than5 to my Ca556a"!5 for their support. ;ast but not least I would li5e to

    than5 my Pa%!n"5for their !onstant support and inspiration in life. I am hihly indebted to

    the almihty for all this blessins.

    B. C0and%a S!80a%.

    5

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    FIBER REINFORCED

    CONCRETE

    I N T R O DUC T I O N

    GENERAL*

    6

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    *on!rete is a !omposite material !ontainin hydrauli! !ement, water, !oarse

    areate and fine areate. he resultin material is a stone li5e stru!ture

    whi!h is formed by the !hemi!al rea!tion of the !ement and water. his stone

    li5e material is a brittle material whi!h is stron in !ompression but +ery wea5

    in tension. his wea5ness in the !on!rete ma5es it to !ra!5 under small loads, a t

    the tensile end. hese !ra!5s radually propaate to the !ompression end of the

    member and finally, the member brea5s. he formation of !ra!5s in the !on!rete

    may also o!!ur due to the dryin shrin5ae. hese !ra!5s are basi!ally mi!ro

    !ra!5s. hese !ra!5s in!rease in si

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    'lso, it helps to maintain stru!tural interity and !ohesi+eness in the material.

    he initial resear!hes !ombined with the lare +olume of follow up resear!h

    ha+e led to the de+elopment of a wide +ariety of material formulations that fit

    the definition of ibre &einfor!ed *on!rete.

    8

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    FIBRE REINFORCED CONCRETE*

    iber reinfor!ed !on!rete =&*> is !on!rete !ontainin fibrous material whi!h

    in!reases its stru!tural interity.So we !an define fibre reinfor!ed !on!rete as a

    !omposite material of !ement !on!rete or mortar and dis!ontinuous dis!rete and

    uniformly dispersed fibre.

    ibre is dis!rete material ha+in some !hara!teristi! properties. he fibre

    material !an be anythin. But not all will be effe!ti+e and e!onomi!al. Some

    fibres that are most !ommonly used are7

    ? Steel

    ? @lass

    ? *arbon

    ? (atural

    ? (B$

    Steel fibre is one of the most !ommonly used fibre. @enerally round fibres are

    used. he diameter may +ary from 0.2A to 0.7Amm.he steel fibre sometimes

    ets rusted and lose its strenth. But in+estiations ha+e pro+ed that fibres et

    rusted only at surfa!es. It has hih modulus of elasti!ity. Use of steel fibres

    ma5es sinifi!ant impro+ements in fle9ure, impa!t and fatiue strenth of

    !on!rete. It has been used in +arious types of stru!tures.

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    @lass fibre is a re!ently introdu!ed fibre in ma5in fibre !on!rete. It has +ery

    hih tensile strenth of 1020 to /00:pa. @lass fibre !on!retes are mainly use in

    e9terior buildin faCade panels and as ar!hite!tural pre!ast !on!rete. his

    material is +ery ood in ma5in shapes on the front of any buildin and it is less

    dense than steel.

    Use of !arbon fibre is not a de+eloped pro!ess. But it has !onsiderable strenth

    and younDs modulus. 'lso in+estiations ha+e shown that use of !arbon ma5es

    the !on!rete +ery durable. he study on the !arbon fibres is limited. :a inly

    used for !laddin purpose.

    (atural fibres are low !ost and abundant. hey are nonha

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    Source: ACI Committee 544, Report 544.IR-82, Concr. Int., Vo. 4, !o. 5,

    p. 11, 1982

    11

    mparison of Mix Proportion between Plain Concrete and Fiber Reinforced Concrete

    e 14-$%&' (e)ur% 'tren*t#, 8 +p%, o t#e er reinorce$ /%' %out 20 #i*#er t#%n t#%t o p%in concrete.

    rce: A$%pte$ rom %nn%, A.!., CA Report R 049.01, ort%n$ cement A''oci%tion, Soie, I, 1977

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    Gtop left steel fiber reinfor!ed !on!rete beams

    Gtop riht lass fiber reinfor!ed !on!rete mi9

    Gbottom left pre!ast steel fiber reinfor!ed tunnel walls

    Gbottom riht !ounter top made with lass fiber reinfor!e !on!rete

    12

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    HISTORY*

    he use of fibers to in!rease the stru!tural properties of !onstru!tion material is

    not a new pro!ess. rom an!ient times fibres were bein used in !onstru!tion. In

    B*, horse hair was used to reinfor!e mortar. %yptians used straw in mud

    bri!5s to pro+ide additional strenth. 'sbestos was used in the !on!rete in the

    early 1Hth

    !entury, to prote!t it from formation of !ra!5s. But in the late 1Hth

    !entury, due to in!reased stru!tural importan!e, introdu!tion of steel

    reinfor!ement in !on!rete was made, by whi!h the !on!ept of fibre reinfor!ed

    !on!rete was o+er loo5ed for A-6 de!ades. ;ater in 1H3H the introdu!tion steelrepla!in asbestos was made for the first time. But at that period it was not

    su!!essful. rom 1H60, there was a tremendous de+elopment in the &*,

    mainly by the introdu!tion of steel fibres. Sin!e then use of different types of

    fibres in !on!rete was made. In 1H70Ds prin!iples were de+eloped on the

    wor5in of the fibre reinfor!ed !on!rete. ;ater in 1H0Ds !ertified pro!ess was

    de+eloped for the use of &*. In the last de!ades, !odes reardin the &* are

    bein de+eloped.

    PROPERTIES OF FIBRE REINFORCED CONCRETE*

    )roperties of !on!rete is affe!ted by many fa!tors li5e properties of !ement, fine

    areate, !oarse areate. ther than this, the fibre reinfor!ed !on!rete is

    affe!ted by followin fa!tors7

    ?

    ype of fiber

    ? 'spe!t ratio

    ? uantity of fiber

    ? rientation of fiber

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    T$! 3 3i&%!*

    ' ood fibre is the one whi!h possess the followin qua lities7

    ? @ood adhesion within the matri9.

    ? adaptable elasti!ity modulus =sometimes hiher than that of the matri9>

    ? !ompatibility with the binder, whi!h should not be atta!5ed or destroyed

    in the lon term

    ? an a!!essible pri!e, ta5in into a!!ount the proportion within the mi9

    ? bein suffi!iently short, fine and fle9ible to permit mi9in, transportin

    and pla!in

    ? Bein suffi!iently stron, yet adequately robust to withstand the mi9in

    pro!ess.

    A5!" %a"i*

    'spe!t ratio is defined as the ratio of lenth to width of the fibre. he +alue of

    aspe!t ratio +aries from 30 to 1A0. @enerally the in!rease in aspe!t ratio

    in!reases the strenth and touhness till the aspe!t ratio of 100. 'bo+e that thestrenth of !on!rete de!reases, in +iew of de!reased wor5ability and redu!ed

    !ompa!tion. rom in+estiations it !an be found out that ood results are

    obtained at an aspe!t ratio around 0 for steel fibres. Jeepin that in +iew we

    ha+e !onsidered steel hoo5ed end fibres with aspe!t ratio of 0 =;enth 60 mm

    and $iameter 0.7A mm>.

    Fi&%! 9an"i"$*

    @enerally quantity of fibres is measured as per!entae of !ement !ontent. 's

    the +olume of fibres in!rease, there should be in!rease in strenth and touhness

    of !on!rete. &eardin our fibre, we hope that there will be an in!rease in

    strenth, with