Structure Site Engineer Interview Questions and Answers

Different grades of concrete are used for different purposes, with varying proportions of cement, sand, and aggregates.

• Grades of concrete include M5, M7.5, M10, M15, M20, M25, etc.

• The proportion of cement, sand, and aggregates varies for each grade.

• For example, M20 grade concrete has a mix ratio of 1:1.5:3 (cement:sand:aggregate).

M25 grade concrete has a compressive strength of 25 megapascals after 28 days of curing.

• M25 grade concrete is a mix of 1 part cement, 1 part fine aggregates, and 2 parts coarse aggregates.

• The compressive strength of M25 grade concrete is typically achieved after 28 days of curing.

• The strength of M25 grade concrete is 25 megapascals, which is suitable for structural applications.