Answer / jayshankar dwivedi

In Nominal Mixes proportion og ingredients for a particular
grade of concrete is fixed for eg. M10 proportion is 1:4:8
Where as in design mix for a particular concrete we decide
proprtion on varios parameters like water cement ration
size of aggregat workablity etc. Trial mixes are taken and
check for there stregnth. For low grade concrete,nominal
and less important work we prefer nominal mixes

Answer / adersh v s

Nominal mix means mixing cement, fine aggregates and coarse
aggregates based on volume
Eg: 1:2:4 mix means mixing one volume of cement with two
volumes of sand and four volumes of coarse aggregates.This
is normally used when the the volume of concrete work to be
done is less.
Design mix is a trial and error procedure.Here the
characteristics of the aggregates cement and water used for
concrete is first analysed and these are mixed in ratio of
their weights and is tested for the design strength.Here
better quality control is maintained and also the
unnecessary wastage of materials is less.

A Design mix is that mix which uses minimum quantity of
components to attain the designed strength of concrete
whereas in a nominal mix attanining the characteristic
compressive strength is the criteria of mix proportioning.

Answer / naresh

Nominal mix is of volume base
Design mix is of weight base

Answer / pandey u. p.

The volume based proportion of mix like 1:2:4, 1:1.5:3 and
1:1:2 are the nominal mix.
When ever pre design strength of mortor is required then we
should go for design mix which is based on different
proportion of material by weight and several material tests
to obtained required strength by trial and error method.

Answer / raguman

difference between nominal mix concrete and design mix
concrete
Nominal mix means mixing cement, fine aggregates and coarse
aggregates based on volume
Eg: 1:2:4 mix means mixing one volume of cement with two
volumes of sand and four volumes of coarse aggregates.This
is normally used when the the volume of concrete work to be
done is less.
Design mix is a trial and error procedure.Here the
characteristics of the aggregates cement and water used for
concrete is first analysed and these are mixed in ratio of
their weights and is tested for the design strength.Here
better quality control is maintained and also the
unnecessary wastage of materials is less.

Answer / suresh

every mix has proportion.nominal mmix mainly used un
important works like as the ratio 1;4;8@1;5;10.but design
mix means proportion of cncrete required as per the slab or
beam or any other reinforcement design strength.
it means simply compressive strength of concrete (it
means proportion of concrete) should be equvalent to the
tensile strength of steel

Answer / adi

nominal design mix is based on assuming the standard values of strength...etc ,present in the indian standard code book

but the design mix is designed by using the locally available materials where several trail and error tests are
done

example: in some places good quality of sand is available there the mix is changed ,in some places coarse aggs will be of good quality there we can change the mix

Answer / tarun johri

Nominal mixes are those proportioned by the volume of the main ingredients and usually written in order of the ingredients thus Cement:Sand: Coarse aggregate (stone, chippings). So a 1:3:6 is a nominal mix containing 1 volume of cement, 3 volumes of sand and 6 volumes of coarse aggregate.

Gauge boxes are generally used to batch the ingredients. The problem with these types of mixes is that the quality of the concrete is entirely dependant on the quality of the materials. In other words, if you use the same gauge boxes to weigh ingredients from different sources, you will most likely have different concrete qualities.

Designed mixes on the other hand are specified as a grade the producer of the concrete has to achieve usually in terms of compressive strength but may include other criteria (size of the stone, minimum amount of cement, flexural strength, air content etc). So a grade 30 concrete

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