ABSTRACT
The concrete compressive strength (R) may be determined from pulse velocity either by:
a) graphical correlations between v and R obtained on test specimens or by b) known analytical correlations between v and R. In general, method 6a gives
more reliable results than method 6b. The pulse velocity may be measured either at fixed amplitude (i.e. v=vƒ) or at
maximum amplitude (i.e. v=vm) provided one or the other is used consistently to test
the structure and the test-specimens. The correlations between R and vƒ and R and vm will be different, and it seems likely that the former will be more sensitive to changes in R.
