Study on effect of replacement of cement by micro silica on compressive strength of fibrous ferrocement produced with GI fibers

Authors
N. K. Patil
Assistant Professor, Dept of Civil Engineering, D.Y. Patil College of Engineering and Technology, Kolhapur K. B. Prakash
2Professor and Head of Civil Engineering Department, College of Engineering and Technology, Belgaum

Abstract

Ferrocement is lightweight cement composite. The applications of ferrocement are vast increasing. Ferrocement does not require any special construction technique and skilled labour. Ferrocement has its cracking resistance, ductility and fatigue resistance higher than those of concrete. In addition impermeability of ferrocement elements is far superior to that of ordinary concrete. It is used for variety of structures such as prefabricated residential units, marine structures and industrial structures. Similarly fiber reinforced concrete (FRC) has also wide applications. FRC possesses higher compressive strength and toughness, increased resistance to wear and tear, and higher post cracking strength. But these two materials have some limitations also. These two materials cannot be employed where high vibrations, high tensile forces and high impact are to be resisted.

Fibrous ferrocement, which is a combination of ferrocement and fiber reinforced concrete, shows better improvement in some of mechanical properties, such as toughness, impact resistance. This new composite also shows higher compressive strength, higher tensile and impact strength.

Besides strength properties, the performance against secondary effects like temperature and shrinkage also play an important role in the durability of concrete. Use of pozzolanic materials like micro silica can improve the strength properties, serviceability and durability of concrete. The replacement of cement to some extent by such pozzolanic material can also achieve economy.

In this paper an attempt has been made to study the effect of replacement of cement by micro silica on the compressive strength of fibrous ferrocement using GI fibers. The percentages of GI fibers were varied as 0%, 0.5%, 1.0%, 1.5%and 2.0%. The cement was replaced by micro silica in different percentages like 5%, 10%, 15%, 20%, 25% and 30%.

Download
PDF