ENHANCE THE PROPERTIES OF DURABILITY OF SELF COMPACTING CONCRETE USING FLY ASH

Abstract

A self-compacting concrete (SCC) is the one that can be placed in the form and can go through
obstructions by its own weight and without the need of vibration. Since its first development in Japan in 1988, SCC
has gained wider acceptance in Japan, Europe and USA due to its inherent distinct advantages. The major advantage
of this method is that SCC technology offers the opportunity to minimize or eliminate concrete placement problems in
difficult conditions. It avoids having to repeat the same kind of quality control test on concrete, which consumes both
time and labor. Construction and placing becomes faster & easier. It eliminates the need for vibration & reducing the
noise pollution. It improves the filling capacity of highly congested structural members. This paper investigates the
study of workability and durability characteristics of Self-Compacting Concrete (SCC) with containing Class F fly
ash. The process of the development of the concrete for durability aspects in various proportions varying from 0%,
10%, 15%, 20% and 25% fly ash as a replacement of cement. The main aim of the paper was to identify the best
proportion of fly ash, which can be replaced with cement to get the desired durability. The effect of fly ash is evaluated
by performing the different tests on the cubes and cylinders to know its durability, durability tests (compressive
strength of cubes after cured in sodium chloride and sulphuric acid for 56 days). Tests of these specimens were
conducted at 7, 28 and 56 days after casting.