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• A composite material & ultra high strength with mechanical properties.
• Mixture of fiber reinforced, super plasticized, silica fume, cement & quartz sand with very low water cement ratio.
• Quartz sand used instead of ordinary aggregate. Therefore increases compressive strength.

COMPOSITION

• It is composed of similar modulus of elasticity and size increasing homogeneity reducing differential tensile strain.
• The material having the largest particle size in RPC is the sand.
• The higher the density, the greater the strength & lower the permeability.
• Water cement ratio used in RPC ranges from 0.15 to 0.25
• Strength more than 200MPa achieved, cured at 90 degree celsious.

COMPONENTS WITH FUNCTIONS PARAMETERS

Components
  • Sand
  • Cement
  • Quartz powder
  • Silica fume
  • Steel fibers
  • Superplasticiser
Function parameters
  • Give strength to aggregate
  • Binding material
  • Maximum reactivity during heat-treating
  • Filling the voids
  • Improve ductility
  • Reduce water binding
PROPERTIES OF RPC

1. COMPRESSIVE STRENGTH
• Higher compressive strength than HPC
• It is a factor linked with durability of material.
• Maximum compressive strength of RPC is approximately 200MPa.
Reactive Powder Concrete


2. FLEXTURAL STRENGTH

• Plane RPC possess high flextural strength than HPC
• By introducing steel fibers, RPC can achieve high flextural strength. 

3. WATER ABSORPTION

Reactive Powder Concrete


4. WATER PERMEABILITY

Reactive Powder Concrete


5. RESISTANCE TO CHLORIDE ION PENETRATION

• Increases when heat curing is done in concrete
• Heat cured RPC show higher value than normal cured RPC.

6. HOMOGENITY

• Improved by eliminating all coarse aggregates.
• Dry components for use in RPC is less than 600 micro meter.

7. COMPACTNESS:

Application of pressure before and during concrete setting period.

8. MICROSTRUCTURE:

Microstructure of the cement hydrate can be changed by applying heat treatment during curing.

9. MATERIAL DUCTILITY:
Material ductility can be improved through the addition of short steel fibres.
APPLICATION

1. SHERBROOKE PEDESTRAIN BRIDGE

Reactive Powder Concrete

2. CONTAINMENT OF NUCLEAR WASTE

• Used for isolation and containment of nuclear wastes.
• It has been used for blocking & stabilization of containment waste.

BENEFITS

• It has the potential to structurally compete with steel.
• Superior strength combined with higher shear capacity result in significant dead load reduction.
• RPC can be used to resist all but direct primary tensile stress.
• Improved seismic performance by reducing inertia load with lighter member.
• Low &non-interconnected porosity diminishes mass transfer, making penetration of liquid/gas non-existent.

LIMITATIONS OF RPC

• Least costly components of conventional concrete are eliminated by more expensive elements.
• RPC replace steel in compression members where durability issues risk. So long term properties are not yet known.








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