A STUDY OF WORKABILITY OF DIFFERENT GRADE OF HIGH VOLUME FLY ASH CONCRETE WITH SLUMP TEST ANALYSIS

Abstract

Global warming has emerged today as a life-threatening issue for the whole world. Since concrete is one of the
most consumed material after water on the earth for infrastructure & construction industries, a commendable
contribution can be made by optimizing the use of cement and natural resources in concrete manufacturing. High volume
fly ash concrete is one of the major developments since last decade leading to utilization of fly ash in a bulk quantity and
thereby reducing cement consumption and ultimately reducing CO2 in order of one ton per a ton of cement. The past
research has been given due weight age for application of HVFA in different sectors like mass concrete, foundation,
transportation etc. but the limitations of HVFA like ductility, poor performance towards expansion and contraction,
flexural property, impact resistance have made its use limited. Introduction of structural/non structural with HVFA
concrete application can overcome these problems and use of HVFA can be increased in developing nation like India for
sustainability.
Looking to the production of the Fly ash, worldwide in general and India in particular the utilization of Fly ash is almost
negligible.
The HVFAC is typically characterized by Very low water content, with Low cement content. Also very
high fly ash content, withVery low water to cementatious ratio.it requires the use of super plasticizer to achieve the
desired workability.