The concrete is subjected to changes in volume either autogenous
or induced. Volume change is one of the most detrimental
properties of concrete, which affects the long-term strength and
durability. To the practical engineer, the aspect of volume
change in concrete is important from the point of view that it
causes unsightly cracks in concrete. The effect of volume change
due to thermal properties of aggregate and concrete, due to
alkali/aggregate reaction, due to sulphate action etc. Presently
we shall discuss the volume change on account of inherenet
properties of concrete “shrinkage”.One of the most objectionable
defects in concrete is the presence of cracks, particularly in
floors and pavements. One of the important factors that
contribute to the cracks in floors and pavements is that due to
shrinkage. It is difficult to make concrete which does not
shrink and crack. It is only a question of magnitude. Now the
question is how to reduce the shrinkage and shrinkage cracks in
concrete structures. As shrinkag