If the
concrete mix is not uniform, the concrete components are detached and it is
known as segregation in concrete. The flow test demonstrates the cohesion of
the concrete mix. Due to inconsistency, the greater particles of concrete aggregate
will detach and proceed towards the edge. Segregation may also occur when
concrete mix is arranged on a sloppy surface. Usually, a cement particle intends
to depart from the center of the concrete mix and abandoning the coarser
material behind. It is difficult to quantify segregation but an expert can
detect it easily.
The strength
of a segregated concrete may change frequently and due to this cracking and
leakages in concrete may occur. So, in order to retain the durability of your
structure, the segregation of concrete should be avoided.
Given below, some helpful tips to
get rid of or minimize segregation:
01.The concrete mix should have been correctly designed with finest quantity of water that is not too wet nor too dry.
02. Ensure the concrete is perfectly blended at the exact speed in a
transit mixture for minimum two minutes. Examine the performance of mixer on daily basis relating to tolerable consistency of distribution of components
in each batch.
03. Properly ship the concrete mix. Select
the shortest route for shipping of concrete mix.
04. Arrange
the concrete in its final position in quickest possible time. The concrete
should not be arranged from large heights.
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05. Formwork should be resistant against water in order that paste
should leakage from the forms. Never vibrate formwork.
06. Do not let concrete to flow.
07. Utilize the vibrator properly and never utilize it to expand a
heap of concrete over a bigger area.
08. Vibrate the concrete for just the exact time (not too long, not
too less).
09. Apply chemical admixtures like air entraining
agent in the mix. Entrained air minimizes the risk of segregation.
10. If any segregation is found in concrete, initiative should be
taken for remixing to make it uniform again.
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