| In the paper,the effects on ordinary cement mortar samples and high performance concrete cement mortar samples with ground granulated blast furnace slag soaked in 4 density sulfate and magnesium salt solutions are studied . The properity of resistance to sulfate and magnesium salt erosion of all the cement mortar samples is evaluated by determining the strength loss and erosion resistence coefficent for 28 days,2 months, 4 months, 6 months, 8 months,10 months, 1 year . The cement grout sample corresponding to cement mortar with equal condition han been examined by using advanced test technology (SEM). After it ,the results of macrostructure test had been verified each other ,and compared it with current sulfate and magnesium salt erosion resistence mechaniam for cement concrete ;Put forward some new opinions and ideas;On condition of this test ,drew a conclusion of the relationship between erosion degree and erosion solution density ,the time of sample used regularly ,the reasons why ordinary samples being destroyed and high performance concrete samples having the excellent properity of resistance to sulfate and magnesium salt erosion.
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