FLY-ASH Coal bottom ash Compressive strength RESISTANCE coal bottom ash ATTACK BOTTOM ASH COMPRESSIVE STRENGTH CONCRETE DURABILITY PARTIAL REPLACEMENT PORTLAND-CEMENT Particle fineness REPLACEMENT RICE HUSK ASH Tensile strength particle fineness tensile strength Aggregates BLENDS Byproduct materials CHLORIDE RESISTANCE Cement replacement Chloride attack Chloride penetration Chloride permeability Concrete aggregates Concrete performance Concrete properties Concretes