1. REACTIVE POWDERREACTIVE POWDER
CONCRETECONCRETE
PRESENTED BY-PRESENTED BY-
Rajesh KumarRajesh Kumar
. Chanchal Sonkar. Chanchal Sonkar
M.Tech.(1M.Tech.(1stst
Year)Year)

2. OUTLINEOUTLINE
• What is it?What is it?
• CompositionComposition
• PropertiesProperties
• What is its applicability?What is its applicability?
• BenefitsBenefits
• Limitations of RPCLimitations of RPC
• ConclusionConclusion

3. 33
INTRODUCTIONINTRODUCTION
• A composite material & ultra high strength.A composite material & ultra high strength.
• Mixture of fiber reinforced, super plasticized,Mixture of fiber reinforced, super plasticized,
silica fume, cement & quartz sand with verysilica fume, cement & quartz sand with very
low water cement ratio.low water cement ratio.
• Quartz sand used instead of ordinaryQuartz sand used instead of ordinary
aggregate. Therefore increases compressiveaggregate. Therefore increases compressive
strengthstrength. (. ( Young’s Modulus 50 to 75 GPa )Young’s Modulus 50 to 75 GPa )22

4. COMPOSITIONCOMPOSITION
• The material having the largest particle size inThe material having the largest particle size in
RPC is the sand.RPC is the sand.
• The higher the density, the greater theThe higher the density, the greater the
strength & lower the permeability.strength & lower the permeability.
• Water cement ratio used in RPC ranges fromWater cement ratio used in RPC ranges from
0.15 to 0.25 (as low as 0.13).0.15 to 0.25 (as low as 0.13).11
• Strength more than 200MPa can be achieved ,Strength more than 200MPa can be achieved ,
cured at 90cured at 90 °C (( bath for 48 hrs. , after initial set ).bath for 48 hrs. , after initial set ).44

5. Components with functionsComponents with functions
parametersparameters
ComponentsComponents
 SandSand
 CementCement
 Quartz powderQuartz powder
(150-600(150-600μμm) (SG=2.75)m) (SG=2.75)
 Silica fumeSilica fume
(25% by weight)(25% by weight)
 Steel fibersSteel fibers
(2.5-10% by volume)(2.5-10% by volume)
 SuperplasticiserSuperplasticiser
FunctionFunction parametersparameters
 Give strength toGive strength to
aggregateaggregate
 Binding materialBinding material
 Maximum reactivityMaximum reactivity
during heat-treatingduring heat-treating
 Filling the voidsFilling the voids
 Improve ductilityImprove ductility
 Reduce water bindingReduce water binding

6. PROPERTIES OF RPCPROPERTIES OF RPC
1. COMPRESSIVE STRENGTH1. COMPRESSIVE STRENGTH
• Higher compressive strength thanHigher compressive strength than
HPC(HPC(High-performance concrete )
• Compressive Strength: (200 to 800 MPa)Compressive Strength: (200 to 800 MPa)22
• 100MPa or greater 24 hours after initial100MPa or greater 24 hours after initial
set.set.33

7. •
www.dicata.ing.unibs.it/plizzari/CD

8. 2. FLEXTURAL STRENGTH2. FLEXTURAL STRENGTH
• Plane RPC possess high flextural strengthPlane RPC possess high flextural strength
than HPCthan HPC
• By introducing steel fibers, RPC can achieveBy introducing steel fibers, RPC can achieve
high flextural strength.high flextural strength.

9. 3. WATER ABSORPTION3. WATER ABSORPTION
http://theconstructor.org/concrete/reactive-powder-concrete/1266/

10. 4. DURABILITY4. DURABILITY
• No carbonation or penetration of chloridesNo carbonation or penetration of chlorides
and sulfates, high resistance to acid attack.and sulfates, high resistance to acid attack.
• Due to low and disconnected pore structureDue to low and disconnected pore structure
resulting from the size of the powderresulting from the size of the powder
materials)materials)
• Heat cured RPC show higher value thanHeat cured RPC show higher value than

11. 5. COMPACTNESS:5. COMPACTNESS:
By aBy application of pressure before andpplication of pressure before and
during concrete setting period.during concrete setting period.
6. MICROSTRUCTURE:6. MICROSTRUCTURE:
Microstructure of the cement hydrateMicrostructure of the cement hydrate
can be changed by applying heat treatmentcan be changed by applying heat treatment
during curing.during curing.
7. MATERIAL DUCTILITY:7. MATERIAL DUCTILITY:
Material ductility can be improvedMaterial ductility can be improved
through the addition of short steel fibresthrough the addition of short steel fibres..

12. APPLICATIONAPPLICATION
1. Sherbrooke Pedestrain Bridge, Canada1. Sherbrooke Pedestrain Bridge, Canada
http://pcwww.liv.ac.uk/RPC.htm

13. 2. CONTAINMENT OF NUCLEAR2. CONTAINMENT OF NUCLEAR
WASTEWASTE
• Used for isolation and containment ofUsed for isolation and containment of
nuclear wastes.nuclear wastes.
• It has been used for blocking of containmentIt has been used for blocking of containment
waste.waste.

14. BENEFITSBENEFITS
• Self-placing, requires no internal vibration.Self-placing, requires no internal vibration.
• The large amount of superplasticizer still makesThe large amount of superplasticizer still makes
it workable.it workable.
• Basically, structures needing light and thinBasically, structures needing light and thin
components and anything that needs extracomponents and anything that needs extra
safety or security such as blast resistantsafety or security such as blast resistant
structures.structures.

15. LIMITATIONS OF RPCLIMITATIONS OF RPC
• No Code!No Code!
• RPC replace steel in compression membersRPC replace steel in compression members
where durability issues risk. So long termwhere durability issues risk. So long term
properties are not yet known.properties are not yet known.

16. CONCLUSIONCONCLUSION
• It has immense potential in constructionIt has immense potential in construction
due to its superior, mechanical &durabilitydue to its superior, mechanical &durability
properties.properties.
• RPC has ultra dense micro structure ,RPC has ultra dense micro structure ,
giving advantageous water proofing &giving advantageous water proofing &
durability characteristics.durability characteristics.

17. REFERENCESREFERENCES
(1)(1) .. Abouzar Sadrekarimi, Development of aAbouzar Sadrekarimi, Development of a
lightweight reactive powder concrete,lightweight reactive powder concrete, journal ofjournal of
advanced concrete technology,advanced concrete technology, No. 3, vol. 2No. 3, vol. 2
(2). A.S.Dili & Manu Santhanam, Investigation on(2). A.S.Dili & Manu Santhanam, Investigation on
RPC:A developing ultra high strength technology,RPC:A developing ultra high strength technology,
TheThe IndianIndian concrete journal, Aconcrete journal, April 2004.pril 2004.
(3). http://pcwww.liv.ac.uk/~lethanh/RPC.htm(3). http://pcwww.liv.ac.uk/~lethanh/RPC.htm
(4). www.dicata.ing.unibs.it/plizzari/CD