The rapid chloride permeability test results for bagasse ash-blended
concrete specimens are shown in Table 5. The total charge
(coulombs) passing through bagasse ash-blended concrete specimens
continuously decreases with the increase in bagasse ash content
up to 25%. At 30%, there is an increase; however the value is
less than that of control. This observation is true for both 28- and
90-day cured specimens. These data show that partial replacement
of high-strength portland cement with bagasse ash considerably reduces
the chloride permeability of the concrete. In particular, the
total charge-passed value for 20% bagasse ash-blended concrete is
considerably less (more than 50% reduction) for cured concretes
both at 28 and 90 days.