Need

1. INTRODUCTION
• Reinforced cement concrete (RCC) and
ferroconcrete, is a composite material in
which concrete's relatively low tensile
strength and ductility are compensated for
by the inclusion of reinforcement having
higher tensile strength or ductility.
RCC AND CURING

2. • Curing is a process during which a chemical
reaction (such as polymerization) or physical
action (such as evaporation) takes place,
resulting in a harder, tougher or more stable
linkage (such as an adhesive bond) or
substance (such as concrete).
CASE STUDY

3. • he standard life of a structure used to be 60-70 years but
now has been significantly reduced due improper
construction practices,
• Homogeneity of concrete
• Cracks, voids and other imperfections
• Changes in concrete with passage of time
• Suitable repair strategies if results raise doubts about
concrete quality
• Damage due to fire, chemical attack etc.
ADVANTAGE OF RCC AND CURING

4. • Strength : R.C.C. has very good strength in tension as
well as compression.
• Durability : R.C.C. ...
• Mouldability : R.C.C. ...
• Ductility : The steel reinforcement imparts ductility to
the R.C.C. ...
• Economy : ...
• Transportation : ...
• Fire Resistance : ...
• Permeability :
DIS ADVANTAGE OF RCC AND CURING

5. • Compared to other binding materials, the tensile
strength of concrete is relatively low.
• Concrete is less ductile.
• The weight of compared is high compared to its
strength.
• Concrete may contains soluble salts.
Soluble salts cause efflorescence.
METHODOLOGY
• Identify test locations
• Drill holes with an electric drill machine to reach the

6. • steel reinforcement rod
• Establish electric contact to the reinforcement
• Measure voltage in millivolts on the surface of concrete at multiple locations of the
member
• Test at different members of the structure
CONCLUSION
• All the tests that have been performed in this case study, readings are taken without removing the
plaster and thus a correction factor of 1.1 has been applied to all the readings.
• The member under testing were found to be doubtful
• All the members tested show that the there is a 50% chance of corrosion in all of them

7. • These elements are highly unsafe and require quick repairs so as to prevent reinforcement from
corrosion.
REFERENCE
• ] S. Sharma and A. Mukherje, “Monitoring corrosion in oxide and chloride environment using
ultrasonic guided waves,” Journal of Materials in Civil Engineering, vol. 23, no. 2, pp. 207–211,
2011
• 2] S. P. Shah, J. S. Popovics, K. V. Subramaniam, and C. M.Aldea, “New directions in concrete
health monitoring technology,” Journal of Engineering Mechanics, vol. 126, no. 7, pp. 754–
760, 2000
• Kumavat H. R, Tapkire Ganesh, Patil P S, Chitte C J, “Condition assessment of concrete with
NDT”