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Vishva Associates
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I applied via Company Website and was interviewed before Jan 2023. There was 1 interview round.
The grade of concrete refers to its strength and is denoted by the mix ratio of cement, sand, and aggregate.
M15 grade concrete has a mix ratio of 1:2:4 (cement:sand:aggregate) and a compressive strength of 15 MPa.
M20 grade concrete has a mix ratio of 1:1.5:3 and a compressive strength of 20 MPa.
M25 grade concrete has a mix ratio of 1:1:2 and a compressive strength of 25 MPa.
The higher the grade, the stronger the concre...
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