35045055-ferrocement.ppt (Size: 3.36 MB / Downloads: 1189)
WHAT IS FERROCEMENT?
Definition of ferrocement reported by ACI Committee 549, 1988Ferrocement is a form of reinforced concrete using closely spaced multiple layers of mesh and/or small diameter rods completely infiltrated with, or encapsulated in, mortar.
In 1940 Pier Luigi Nervy, an Italian engineer, architect and contractor, used ferrocement first for the construction of aircraft hangars, boats and buildings and a variety of other structures.
It is a very durable, cheap and versatile material.
COSTITUENTS OF FERROCEMENT
Cement: The cement should be fresh, of uniform consistency and free of lumps and foreign matter.
Fine Aggregates :Normal weight fine aggregate clean, hard, strong, free of organic impurities and deleterious substances and relatively free of silt and clay.
Water :Potable water is fit for use as mixing water as well as for curing ferrocement structures.
Admixture : Chemical admixtures used in ferrocement serve purposes OF water reduction, with strength and reduces permeability; air entrainment, which increases resistance to freezing and thawing; and suppression of reaction between galvanized reinforcement and cement
The desired shape using ferrocement may be built from a multi-layered construction of chicken wire or other steel mesh.
Over this finished framework, an appropriate mixture of cement, sand and water is spread out
A considerable amount of time may be necessary for the material to fully cure and reach its final strength
Ferro cement has very high tensile strength- to weight ratio and a superior cracking behavior
Low w/c ratio produces an impermeable structures
Ferro cement structures have high durability ,less shrinkage, and low weight.
FERROCEMENT COMPOSITES HAVE:
Thickness 6 to 50 millimeters
Steel cover 1.5 to 5 millimeters
Ultimate tensile strength up to 34 MPa
Allowable tensile stress up to 10 MPa
Modulus of rupture up to 55MPa
Compressive strength up to 28 to 69MPa
Its basic raw materials are readily available in most countries.
It can be fabricated into any desired shape.
The skills for ferrocement construction can be acquired easily.
Heavy plants and machinery are not involved in ferrocement construction.
Being labor intensive, it is relatively inexpensive in developing countries.
It is widely used due to the low self weight, durability & versatility.
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.
Large no of labors required
It is difficult to fasten to ferrocement with bolts,screws,welding and nail etc..
Tying rods and mesh together is especially tedious and time consuming.
HOUSING:Ferrocement houses utilizing local materials such as wood, bamboo or bush sticks as equivalent steel replacement have been constructed in Bangladesh & Indonesia
MARINE :Ferro cement can be effectively used for various water supply structures like well casings for shallow wells, water tanks, sedimentation tanks, slow sand filters and for sanitation facilities like septic tanks, service modules and sanitary bowls
FERRO CEMENT ROOFING TECHNOLOGY
WORKS CARRIED OUT
Al-Ameen College, Bangalore
Leela Palace Bangalore
Sai Super Specialty Hospital, Whitefield, Bangalore
Kolkata Commercial Plaza, Kamaraj Road, Bangalore
Dome Residence for I. K Hospital,
Alipur Sai temple, Kanakapura Road.
ON GOING PROJECTS
AP gem and Jewelry Park, Hyderabad
.Phonix uppel, Hyderabad.
Vydehi. White field. Bangalore.
Don Basco college, Mysore Road, Bangalore.
Pre-Cast housing, Alipur.