SSC JE Civil Engineering 25-Sep-2019 Shift 1 Solved Paper

Question : 159 of 200

Marks: +1, -0

What is the meaning of the designation 'M30' concrete suggested for a reinforced cement concrete work?

The mix characteristic compressive strengthof 100 mm size cube at 28 days is 30 N/mm $^{2}$ .
The mix characteristic compressive strengthof 150 mm size cube at 365 days is 30 N/mm $^{2}$ .
The mix characteristic compressive strengthof 150 mm size cube at 28 days is 300 N/mm $^{2}$ .
The mix characteristic compressive strengthof 150 mm size cube at 28 days is 30 N/mm $^{2}$ .

Solution:

Designed reinforced cement concrete work is defined by the characteristic compressive strength at 28 days and identified by the strength class. Class M30

( C_25/30

as per British Standards) is the concrete having a mix characteristic compressive cube strength of 150 mm size cube is 30 N/mm

^{2}

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