The best fit cement selection for concretes that receive destructive chemical mileus in different compositions

The cubic concrete examples are prepared with four type cements as CEM I, CEM II, CEM IV and SDÇ. The aggregate types, amounts and the water/cement rates are constant in this experiment, the only flexible thing is cement type. We have two different concrete types as C 20 and C 30. Also we have 72 examples for each concrete type and totally 144 examples. So we prepared 36 examples for each cement type. After that these examples are waited in three different pools that two of them contains different compositions waste water and the other one is clean water. Crack results are considered after 28 and 180 days later.As a result, concretes are prepared different cement types. These concretes? state is compared in waste water and researched how to effect durability.