| Deterioration in concrete not only affects the aesthetic beauty of the
structure, but also is highly important from the point of view of
durability. Despite concerted efforts of scientists and technologists
to solve this problem, concrete deterioration continues to exist on a
global scale.
The paper reviews the most important modes of chemical attack
on concrete, which include chloride ion penetration, sulphate attack
and carbonation. The possible mechanisms of attack are discussed.
The roles of pozzolanic substances, such as silica fume, fly ash and
slag in reducing deterioration in concrete are described with reference
to some of the findings of different workers over the last few
years. |
