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The rock fill dams, for the most part use in gigantic hydraulic geo technical, exposures to water and aggressive solutions such as:sea water, destructive mining waste. In particular, the mechanical properties of rock fill dams is depended on volumetric deformation.However,the volumetric deformation of rock fill dams depends on as well as the contact solutions inducing different engineered reaction. The engineered reaction prompts the modifications of rock fill dams mechanical be haviour such as irreversible settlements. The changes create over the time. To to some degree predict the compound defilement rock fill dams, the geochemical modelling is used to reenact substance reactions between heterogeneous particles or different mineral of rock fill dams. The model can expect modestly the long material performance of rock fill dams receptiveness to different environment such as acidmining drainage and sea water.