a) 0.50

b) 0.45

c) 0.60

d) 0.55

As per Cl. 8.2.2, Table 2 of IS 456:2000, the maximum free water-cement ratio is specified based on the exposure condition and concrete grade. For an ordinary reinforced concrete of M20 grade under mild exposure condition, this ratio should not exceed 0.55.

Therefore, option d) 0.55 is the correct maximum free water to cement ratio allowed for M20 grade reinforced concrete under mild exposure as per IS 456-2000 specifications.

See also  The maximum energy that a given component can absorb without undergoing any permanent deformation up to its elastic limit is known as:

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N Lavanya

Lavanya is a passionate content writer about Structural Design, Grouting, Columns, Beams etc. She has 5 years of experience in teaching in Civil Engg. She enjoys writing complete guides and tips. Her passion is in building materials, construction standards, foundation design and building codes.

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