1. INTRODUCTION
1.1 General
Plain concrete is a brittle material. Concrete without any
fibers will develop cracks due to plastic shrinkage, drying
shrinkage and changes in volume of concrete. Development
of these micro cracks causes elastic deformation of concrete.
In order to meet the required values of flexural strength,
fibers are used in normal concrete. The addition of fibers in
plain concrete will control the cracking due shrinkage and
also reduce the bleeding of water. Not much importance is
given to the use of coconut fibers (coir) in concrete. Some of
the researchers have used coconut shells as a partial
replacement of coarse aggregates.