ABSTRACT
The type of cement has a considerable effect on the concrete resistance to chloride ions penetration. Ordinary portland cement in transition zone (zone of contact of aggregate and cement stone) is increased by content of lime crystal which increases porosity. In case of blended cement the improvement of durability of concrete is described in their particular attributes and impacts, generally characterized by pozzolans reaction (fly ash, silica fume and blast furnace slag) and volume filling of pores (silica fume and limestone filler).
