As per IS 456 2000 Clause 16, table 11, page no. 30, it is
written that acceptance strength of concrete is fck+4 for
grade above M20. what is the meaning of " Mean of the group
of 4 Non- overlapping consecutive test results"
Answer / sita rama raju
Average of 4 consecutive and different test samples (1 sample = 3 cubes).
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5. Two long boundary walls run parallel to each other at a center to center distance of 1 meter apart. The width and height of the first wall are 0.30 m and 2.5m respectively. While those of the second are respectively 0.18m and 3.5m. Plot the distribution of vertical stress intensity due to walls on a horizontal plane, 1m below ground level. The walls have negligible depth of foundation and are made of brick masonry (y = 19.2 kN/m cu)
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