To study the effect of compacting agent on the resistance of cement to chloride ion penetration.Three kinds of compacting agents(S,Y,T)were selected to study the influence of compacting agents on cement mechanical properties and chloride ion penetration resistance under different dosage.The pore structure was analyzed by mercury injection and scanning electron microscope.When the content of S is 0.02％,Y is 0.03％and T is 0.02％,the compressive strength of cement 3 d and 28 d is improved,and the electric flux of 28 d is reduced by 7.75％,9.44％and 10.2％,respectively,compared with the blank sample.The addition of the compacting agent can make the cement more hydrated,reduce the number of pores and cracks effectively,and improve the compactness of the cement stone structure.Compaction agent can promote the development of cement strength at low content,reduce the porosity of cement,improve the pore structure,and enhance the resistance of cement to chloride ion penetration.
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