blast resistant concrete
TRANSCRIPT
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RESISTANT
BLAST
CONCRET
E
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We know that concreteis the most widely usedmanufactured material on our planet.
In todays world we have witnessed the loss of livesdue to eect of terrorist attacks against our
concrete structures.So a new type of concrete called Blast Resistant
Concrete has een developed to overcome this typeof limitations of concrete.
Blast resistant concrete is developed with choppedsynthetic !ers treated y a proprietary processthat permits !ers to e added to concrete mi"ed incommercial e#uipment.
INTRODUCTION:
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WHY WE USE FIBERS INCONCRETE:Adding fbers to concrete imro!es
mec"#nic#$ roerties:
Increases toughness.
Increases ductility and $e"ural resistance.
%ets higher and more stale tensile strength.
Increases shear resistance.
And c#n imro!e contro$ %or t"e %o$$o&inge'ects:
Impact.
Shrinkage.
&ire resistance.
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'ither (Caron &ier Reinforced Concrete)
*C&RC+
,r (-ltra igh /erformance &ier ReinforcedConcrete) *-/&RC+
B$#st Resist#nt Concrete "#s beenm#de o% t&o di'erent t(es o%
concretes:
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0oday short caron !ers 1 measuring notmore than 2.3 inches 1 are found in uildings4ridges and slas to limit the si5e of cracks.
But for C&RC we use up to 6 inches in length4signi!cantly improving a structure7s aility towithstand lasts4 hurricanes and other naturaldisasters.
8ue to the greater length of these !ersstructural properties and spalling resistance isalso greatly enhanced.
C#rbon Fiber Rein%orced Concrete:
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Type of
Fibers Equivalent
diameter
m
Relativ
e
density
Tensile
strength
MPa
Elastic
modulu
s
GPa
Ultimate
elongation
!gnition
tempera
ture
"#
Melt$
o%idation$ or
decomposition
temperature "#
&ater
absorption
'crylic ()*(+, (-(.*
(-(/
01+*
(+++
(,*(2 1-3*3+-+ * 00+*0)3 (-+*0-3
'ramid (0 (-,, 02++ .+ ,-, 4igh ,/+ ,-)
#arbon (+*() (-.*(-1 ),3+*
,+++
)/+ 0-+*0-, 4igh 3++ 5il
5ylon 0) (-(, 21+ 3 0+ * 0++*00+ 0-/*3-+
Polyester
0+ (-),*(-)2
0)+*((++
(1 (0*(3+ .++ 0.+ +-,
Poly
ethylene
03*(+++ +-20*
+-2.
13*32+ 3 )*/+ * ()+ 5il
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STANDARD STEE) REINFORCEDCONCRETE AFTER B)AST
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B)AST RESISTANT CONCRETEAFTER B)AST
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9ow weight
T"e roerties o% c#rbon fberrein%orced concrete
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-/&RC is a concrete which is een otainedfrom the development of igh /erformance&ier Reinforced Concrete.
0he -/&RC resisted the high e"plosion lastwithout any disintegration from the ack ofthe panels causing shrapnel.
-/&RC is dierent ecause needle1thin steel
!ers are added into the concrete mi" insteadof steel reinforcing ars to increase its tensilestrength.
U$tr# Hig" *er%orm#nce Fiber Rein%orced
Concrete:
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#ompressive
strength6psi7
Fle%ural
strength6psi7
Toughness6lbs*in7
Conventional
concrete
6151 750 186
Blast resistant
concrete (only fiber)
6652 1904 1834
Blast resistant
concrete(with fiber
an steel)
6619 2114 2691
di'erence bet&een t"e con!ention#$concrete #nd b$#st resist#nt
concrete +#ccording to testscond,cted-:
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-/&RC is a new type of material that comines a verystrong and dense cementicious matri" with very high !ercontent.
It has a very high compressive strength of :;;
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9onger caron !ers are more likely to all up as the concrete is mi"edF#i$,res #nd Ad!ices
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A**)ICATIONS
industrial construction appli industrial construction appli
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0he potential of this Blast resistant concrete isgreat.
0his concrete has very special propertieswhich can revolutioni5e the constructionindustry oering lighter1weight4 safer andstronger uildings.
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