Describe Appropriate Curing Method and duration?
Describe Appropriate Curing Method and duration?
( 1 ) Water curing
( 2 ) Membrane curing
( 3 ) Application of heat
1. Water Curing: -
This is by far the best method of curing as it satisfies all the
requirements of curing, namely, promotion of hydration, elimination of
shrinkage and absorption of the heat of hydration. It is pointed out that even if
the membrane method is adopted, it is desirable that a certain extent of water
curing is done before the concrete is covered with membranes.
Water curing
can be done in the following ways:
( a ) Immersion ( b ) Ponding ( c ) Spraying or Fogging ( d ) Wet covering
2. Membrane Curing:-
Membrane Curing is a good method of maintaining a
satisfactory state of wetness in the body of concrete to promote continuous
hydration when original water/cement ratio used is not less than 0.5. To achieve
best results, membrane is applied after one or two days’ of actual wet curing.
Membrane curing by spraying.
3. Application of heat:- The development of strength of concrete is a function of
not only time but also that of temperature. When concrete is subjected to higher
temperature it accelerates the hydration process resulting in faster development
of strength. Concrete cannot be subjected to dry heat to accelerate the hydration
process as the presence of moisture is also an essential requisite
A faster attainment of strength will contribute to many other advantages
mentioned below.
( a ) Concrete is vulnerable to damage only for short time.
( b ) Concrete member can be handled very quickly.
( c ) Less space will be sufficient in the casting yerd.
( d ) A smaller curing tank will be sufficient.
( e )The work can be put on to service at a much early time
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