Answer / narendra

With new concrete design methods the strength can go beyond
60. i.e. in petronous tower concrete used was 80 grade. its
composition is done with other additives like iron slag
powder etc., totally designed with coputers.

Answer / narendra rathore

M80

Answer / tejpal

M80 are defined as high
strength concrete.

Answer / vivek sharma

In the modern age of civil engg new technic are developed.
For more strength of concrete the grade is used M80 which
is richest one or in the modern technic design mix is used
i.e by weight which gain more strength.

Answer / subhendu cha........

concrete of grade M100 is already in practice and
ingradient is mainly flyash + some other
admixture..........highly heat resistive.

Answer / mamta rani mohapatra

when the grade of concrete is more mix proportion becomes less nd the strength can be increased.m80 is the highest strength concrete but in india only up to m40 grade concrete is used.
but in foreign country m120 grade concretes are also used for heavy structure

Answer / hiren thakkar

M80 Grade Concrete is Highest grade of concrete and
highest strength. Normally to get higher strength fly ash to
be added as an ingredient. This grade of concrete normally
used in Nuclear Power plant.

Answer / ashwani

i appreciate all above ans
question rely btn design mix & nominal mix

Answer / alekh

as far as high strength concrete is concerned
strength more than m50 is known as high strength concrete
... but for this we go for design mix ...for that we use
some special admixtures,super plasticizers for better
workability

( for strength more than m20 nominal mix not recommended .
Although for m 25 its composition is 1:1:2)

Answer / sreenath

M80

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