Table 3: R.C. Columns Samples with Different Variables.

Item Sample ƒcu, MPa ρg %
Group 1 C11 30 2%
C12 60 2%
C13 90 2%
C14 120 2%
Group 2 C21 30 4%
C22 60 4%
C23 90 4%
C24 120 4%
Group 3
C31 30 8%
C32 60 8%
C33 90 8%
C34 120 8%