CONCRETE MIX DIFFERENCE
1. NOMINAL MIX CONCRETE
2. DESIGN MIX CONCRETE
NOMINAL MIX
CONCRETE

DESIGN MIX
CONCRETE

Design we are considering
the ratio of ingredients like 1:2:4 here no water cement ratio, size of
aggregate, strength, durability, work ability are considered

Design apart from
ingredients of the factors like, Water cement ratio, size of aggregate,
work ability etc kept in consideration while designing

Taking same amount of
ingredient for two Nominal Mix design may have different strengths.

In this mix design it give
same strength .

Design is not economical

It is Economical

Nominal Mix
·
The concrete is making or mixing by taking
standard manually proportions of cement sand & aggregate i.e. concrete
ingredients, it is known as nominal mix concrete.
·
In this type of concrete mix, concrete mix
considering all ratios in standard volume where the strength and cost of
concrete are varies.
·
In this type of concrete strength is
prescriptive
·
This type of concrete mixed is used in grade not
higher than (1: 1.5: 3) M20.
·
In this type of concrete there is difficult for quality
control.
·
Water cement (WC) ratio is based on experience, durability
criteria & practical trials.
·
Water content can be modified by slump test or
slump value best on the field
Design Mix
·
In design mix
concrete, proportions of the ingredients are properly determined with their
relative ratio to achieve the concrete of desired strength. In this type of
concrete mix the process of selecting suitable ingredients of concrete
and determining their relative proportions with the object of producing
concrete Not only the desired strength but also
according to the properties of fresh concrete like workability or performance of concrete with the certain
specifications are taken in detail consideration.
·
In this type of design concrete mix is a mix
considering all ratio of mix is by weight where strength of concrete is
constant & the cost of concrete can be reduced.
·
In this type of concrete strength is constant
·
It is adopted when the concrete grade need
higher than M20.
·
In this type of concrete there is no difficult for
quality control.
Design Mix 
·
Water content can be modified taking in to account
the laboratorybased test.`
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