SEMINAR REPORT ON

REACTIVE POWDER CONCRETE

-:Presented By:-

Subhendu Rana

Department of Civil Engineering

University Roll no- 10301310058

Haldia Institute of Technology

• 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.

Introduction

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.

Composition

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

Components with function parameters

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.

Properties of RPC

• Plane RPC possess high flextural strength than HPC

• By introducing steel fibers, RPC can achieve high flextural strength.

2. Flextural Strength

3. Water Absorption

4. Water Permeability

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.

1. SHERBROOKE PEDESTRAIN BRIDGE

Applications

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.

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.

Limitations of RPC

• It has immense potential in construction due to its superior, mechanical &durability properties.

• RPC has ultra dense micro structure , giving advantageous water proofing &durability characteristics.

Conclusion

• Abouzar Sadrekarimi, Development of a lightweight reactive powder concrete, journal of advanced concrete technology, No. 3, vol. 2

• A.S.Dili & Manu Santhanam, Investigation on RPC:A developing ultra high strength technology, The Indian concrete journal, April 2004.

• M S Shetty , concrete technology S. Chand & company LTD, Ram Nagar New Delhi.

• www.wikipedia.org

References