Effect of coconut fibre in concrete and to improve the workability by incorporating an admixture

Abstract

Natural fibres are those fibre which are pollution free, environment friendly and does not have any bad effect on climate. Every year there is ample amount of wastages of natural fibre .If these natural fibres used as a construction material it could save the bio-reserves. They acts as green construction material. Amongst all natural fibres, CF is the fibre which has the better physical and chemical property also it is renewable, cheap, resistant to thermal conductivity, more durable, highest toughness, most ductile then the other natural fibre, it is capable of taking strain four time more than other fibres. Hence, CF is a best material to be used in construction. The objective of this investigation is to enhance the strength properties of concrete using coconut fibre. Addition of CF resulted into cohesive mix. To overcome this drawback the suitable dosage of admixture was incorporated without effecting it strength properties. In the present study the behavior of specimen with respect to compressive strength and the cracking behavior of concrete and CFRC has been investigated. According to I.S. specification different test is conducted to enhance the workability and strength properties by addition of CF. different test such as slump test and flow table test on fresh concrete is carried out and compressive strength and split tensile strength is carried out on hard concrete. The present study involves the use of super plasticizer, master glenium 8654 (0.4% by mass cone test) in M30 grade of concrete (grade ratio =1:1.918:2.898) which helps in enhancing the workability without affecting the strength with CF (2%,3.5%,5%) and is compared with the conventional concrete of same grade.