Application Of Ferro-cement In Contruction
Ferro-cemnt is a relatively new material consist of wire meshes and cement mortar.
Developed by P.L.Nervi,an Italian architect in 1940.
Widely used due to the low self weight,lack of skilled workers,no need of framework etcÂ¦.
Quality of ferrocement works are assured because the components are manufactured on machinery set up and execution time at work site is less.
Maintenance cost is low.
Ferro-cement construction has come into widespread use only in the last two decades.
What is Ferro-cement?
Highly versatile form of reinforced concrete.
Its a type of thin reinforced concret construction,in which large amount of small dia wire meshes uniformly through out the cross section.
Mesh may be metal or suitable material.
Instead of concrete portland cement mortar is used.
Strength depends on two factors quaility of sand/cement mortar mix and quantity of reinforcing materials used.
Basic raw materials are readily available in most countries.
Fabricated into any desired shape.
Low labour skill required.
Ease of construction,low weight and long lifetime.
Low construction material cost.
Better resistance against earthquake.
Structures made of it can be punctured by collision with pointed objects.
Corrosion of the reinforcing materials due to the incomplete coverage of metal by mortar.
It is difficult to fasten to ferrocement with bolts,screws,welding and nail etcÂ¦..
Large no of labours required.
Cost of semi-skilled and unskilled labours is high.
Tying rods and mesh together is especially tedious and time consuming.
Fabricating the skeletal framing system.
Applying rods and meshes.
Anticorrosive Membrane Treatment.
Cost Effectiveness Of Ferro-cement Structures
The type of ecnomic system.
Type of applications.
Relative cost of labour.
Capital and local tradition of construction procedure.
Doesnâ„¢t need heavy plant or machinery.
Low cost of construction materials.
Ferro-cement come into wide spead use only in the last two decades and still in its infancy.Sufficient design information is available and adequate field experience has been acquired to enable safe design and construction of many types of ferro-cement structures.
Whether it can economically compete with alternate materials depends on the type and location of application.
For industrially developed countries,ferro-cement seems economical for medium storage tank.roof shells,boat,tank and the ease of forming complicated shapes and lighter weight of ferro-cement can be safely exploited.