2. Contents
• Introduction
• What Is Ferro-cement?
• Materials Used In Ferro-cement
• Properties Of Ferro-cement
• Behaviour Of Ferro-cement
• Process Of Ferro-cement
• Cost Effectiveness Of Ferro-cement
• Applications
• Advantages
• Disadvantages
• Conclusion
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3. Definition
Ferro cement is a form of reinforced
concrete using closely spaced multiple
layers of mesh and/or small diameter rods
completely infiltrated with, or encapsulated
inmotor
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7. Cement Mortar Mix
• OPC and fine aggregate
matrix is used
• sand occupies 60 to 75%
of the volume of the
mortar
• Plasticizers and other
admixtures are used
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8. Skeleton Steel
• Used to impart
structural strength in
case of boats, barges
etc.
• Reinforcement should
be free from dust, rust
& other impurities
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9. Steel Mesh Reinforcement
• Available as
woven/interlocking
mesh and welded mesh
• Expanded-metal lath is
also used
• Made from carbon,
glass etc.
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11. Chemical Admixtures in Ferro cement
• water reduction, with strength
and reduces permeability.
• Air entrainment, which increases
resistance to freezing and thawing;
• suppression of reaction between
galvanized reinforcement and
cement .
12. Water
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• Water should be portable.
• clean, and free from organic matter - silt, oil,
sugar, chloride and acidic material
• pH equal or greater than 7 .
Mix Proportions
•Sand: cement ratio (by mass) 1.5 to 2.5
•Water: cement ratio (by mass) 0.35 to 0.60
13. Properties Of Ferro Cement
• It is a very durable, cheap and versatile material.
• Low w/c ratio produces an impermeable structures
• less shrinkage, and low weight.
• high tensile strength and stiffness
• better impact and punching shear resistance
• undergo large deformations before cracking or high
deflections
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15. Process Of Ferro-cement Construction
• Fabricating the skeletal framing system
• Applying rods and meshes
• Plastering
• Curing
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16. Cost Effectiveness
• Depends on type economic system and
applications.
• Relative cost of labor.
• Doesn’t need heavy plant or machinery.
• Low cost construction materials are used.
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20. • Fire resistant structures
• Soil stabilization
• Man hole covers
• Wall cupboards
• pipes
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21. Advantages Of Ferro -Cement:
• 20% savings on materials and cost
• Suitability for pre-casting
• Flexibility in cutting, drilling and jointing
• Very appropriate for developing countries, labor
intensive
• Good impermeability
• Fabricated into any desired shape.
• Ease of construction, low weight and long
lifetime.
• Better resistance against earthquake.
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22. Disadvantages of Ferro-Cement:
• Corrosion of the reinforcing materials due to the
incomplete coverage of metal by mortar.
• It is difficult to fasten to Ferro-cement with bolts, screws,
welding and nail etc.
• Large no of labors required.
• Cost of semi-skilled and unskilled labors is high.
• Tying rods and mesh together is especially tedious and
time consuming.
• Low ductility
• Susceptibility to stress rupture failure
• It can be punctured by collision with pointed objects.
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23. Conclusion
In India, Ferro-cement is used often because the
constructions made from it are more resistant to
earthquakes. It has a wide range of other uses
including sculpture and prefabricated building
components.
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