Thisinvestigationdevelopssomeimportantdataonthemechanicalproperties, bondstrengthbetweenconcreteandsteelrebar,andmicrostructureofcrudeoil-soaked Concretecontainingsilicafumeandnanosilica.Experimentswereperformedineightmixes withdiierentpercentagesofnanosilicaanddiierentwater-cementratios.Concretesamples werecuredinthepetrol,gas-oil,2.5%solutionofsulfuricacid,andwater.Toconclude, consideringtheresults,recommendationsonoptimizationofnanosilica,silicafume,and water-cementratioforthistypeofconcreteforuseintheconstructionofconcretetanks holdingpetroleumproductsareooered.Theresultshowsthatnanosilicacanimprove variouspropertiesoftheconcreteincorrosiveconditions.