Ferrocement Structural Applications.pptx

8/10/2019 Ferrocement Structural Applications.pptx

1/19

Ferrocement

BY

R.S.S.ADITYA

N.SIVA RAMA KRISHNA

R.SAIRAM


2/19

TYPICAL CROSS SECTION OF FERROCEMENT


3/19

What is Ferro cement?

Ferro cement is a type of a

thin reinforced concretesection, wherein the

reinforcement is dispersed

spatially across the mortarmatrix in the form of wire

meshes.


4/19

STEEL MESH REINFORCEMENT

Consists of galvanized steel wires of diameter 0.5 to 1.5 mm,spaced at 6 to 20mm centre to centre

Welded wire mesh has hexagonal or rectangular openings Expanded-metal lath is also used Made from carbon, glass

etc.

Chicken wire mesh


5/19

Well-dispersed mesh reinforcement in ferro--cement results in better strain distribution acrossthe matrix.

Mesh provides tensile strength to the brittle mortarmatrix whereas, the mortar supplementscompressive strength and stiffness to the meshes.


6/19

Meshes can be of steel, fiber-reinforced plastics,carbon fibers etc.

Steel meshes are most commonly used.

Steel meshes are available in different forms viz.woven, welded or expanded metal


7/19

Ferrocement came into existence way back in1848, even before the invention of reinforcedconcrete.

Nervirevived its application in the field ofstructural engineering by constructing fewstructural elements


8/19


9/19

A paste of mortar is forced into thelayers of mesh by hand . . .

(Smith Kampempool, Applied ScientificResearch Corporation of Thailand)


10/19

ADVANTAGES OF FERRO-CEMENT

It is highly versatile and can be formed into almost any

shape for a wide range of uses

20% savings on materials and cost

Suitability for pre-casting

Flexibility in cutting, drilling and jointing

Very appropriate for developing countries; labor intensive

Good fire resistance

Good impermeability

Low maintenance costs


11/19

APPLICATIONS OF FERRO CEMENT

1. Marine Applications

Boats, fishing vessels, barges, cargo tugs, flotation buoys

Key criteria for marine applications: light weight,

impact resistance, thickness and water tightness

2. Water supply and sanitation

Water tanks, sedimentation tanks, swimming pool linings,

well casings, septic tanks etc.

3. Agricultural

Grain storage bins, silos, canal linings, pipes, shells for fish

and poultry farms


12/19

4. Residential Buildings

Houses, community centers, precast

housing elements, corrugated roofing

sheets, wall panels etc.

5. Rural Energy

Biogas digesters, biogas holders,

incinerators, panels for solar energy

collectors etc.


13/19

Lambot's original ferrocement boat built in 1848 now rests in the BrignolesMuseum in France. (Brignoles Museum, France)


14/19

Built in 1887, this Dutch ferrocement boat was still afloat, in 1967,at the

Amsterdam Zoo. (Cement, Amsterdam, The Netherlands)


15/19


16/19

Ferrocement

Chajja attachment to thewindow showing load

bearing


17/19

DISADVANTAGES OF FERRO-CEMENT

Low shear strength

Low ductility

Susceptibility to stress rupture failure

It can be punctured by collision with pointed

objects.

Corrosion of the reinforcing material due to the

incomplete coverage of metal by mortar.

It is difficult to fasten to ferrocement with bolt,screw, welding and nail etc.

Tying rods and mesh together is especially

tedious and time consuming.


18/19

References:

1. Presentation by Dr. C.B.K.Rao

2.Presentation by Dr.S.V.Rao


19/19

THANK YOU

Ferrocement Structural Applications.pptx

Documents

Transcript of Ferrocement Structural Applications.pptx