CHARACTERISTIC STUDY OF HIGH VOLUME        FLYASH CONCRETE WITH ADDITION OF OPTIMUM % OF COIR AND GLASS FIBER 

The use of concrete containing high volume fly ash has recently gained popularity as a resource efficient , durable and sustainable option for a variety of concrete applications. The addition of natural fibre into fresh concrete can increase the ductility of the concrete matrix. Economic and other related factors in many developing countries where natural fibres are abundant , demand that engineers apply appropriate technology to utilize the natural fibres as effectively and economically as possible. To evaluate the efficiency of coir and glass fibres in improving the properties of the concrete the performance of plain concrete is used as a reference. Compressive strength , modulus of elasticity , split tensile strength , flexural strength , durability tests such as water absorption and acid resistance were determined for all fibre reinforced concrete and plain concrete specimen. The current manuscript deals with subject of addition of natural and artificial fibres to concrete in order to study the strength properties. . The increase in cube compressive strength for fly ash based fiber concrete with respected to the age is generally less than that for plain concrete. The maximum flexural strength obtained for high volume flyash and fibre content 0.15% of coir fiber and 1.5% of glass fiber was 5N/mm2 and that for plain concrete was 2.82N/mm2. The corresponding strength improvement is 43.65%. It is seen that high volume flyash concrete and plain portland cement concrete shared a nearly equal strian value of the point of maximum stress. . The performance of 50% fly ash replaced concrete is better than the plain concrete against acid exposure.SEM provides an excellent technique for examining the surface morphology of fibres. Selective natural waste materials at large are utilized to improve the strength and ductility properties of concrete. From the EDAX spectra recorded, calcium is the main mineral component, but silicon, aluminium and even potassium is well augmented.  

Keywords : Coir fiber , Glass fiber , Compressive strength , Durability   

About The Author:

Sp.Aswinpalaniappan M.E.,*

Member of American Concrete Institute

Sri Raaja Raajan College of Engineering and Technology

Karaikudi, Tamil Nadu 630301