ByN Lavanya
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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.
N. Lavanya is a sincere and honest civil engineering writer for civilenggblitz.com, known for her clear, practical articles that help learners and professionals alike. She has 5 years of teaching experience in civil engineering, which strongly influences her structured, easy-to-follow writing style. Her primary interests include structural design, grouting, columns, beams, and related structural components, and she particularly enjoys creating complete guides and actionable tips on these topics.
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