The recommended values of compressive strength (CS) and water absorption (WA) for heavy duty burnt clay bricks of class 400 as per IS 2180 are respectively:
1
CS = 45 to 50 N/mm2; WA ≤ 20 %
2
CS = 35 to 40 N/mm2; WA ≤ 15 %
3
CS = 30 to 40 N/mm2; WA ≤ 12 %
4
CS = 40 to 45 N/mm2; WA ≤ 10 %
5
Question Not Attempted