Waterproofing of underground structures is frequently a problem and a range of solutions
have been tried in the last two decades. Dominating the market are PVC and HDPE (high
density poly ethylene) sheet membranes, but recently the alternative, is concrete admixtures
for water permeability reducing and so that use in concrete isolation (waterproofing), the
longevity of a concrete structure is influenced by the permeability of the concrete, In this
research, it has been addition ADDICRETE DM2 and PLASTOCRETE N to the mixture by
difference ratio. 1%, 0.5%, 0.45% ,0.35% of cement weight, constant ratio from , sand,
gravel, cement and water W/C=0.45 in all tests that used in the research . The study of these
tests by measuring the permeability of concrete specimens prepared in the laboratory. Many
tests were carried out and the results were presented.