This　study　focuses　on　mercury　slag　in　the　Tongren　area　of　Guizhou　Province,　China.　Computed　tomography　(CT)　is　used　with　uniaxial　and　triaxial　compression　tests　to　examine　the　mechanical　changes　in　cemented　mercury　slag　and　its　formation.　The　CT　results　for　the　uniaxial　compression　test　reveal　the　overall　failure　process　of　themercury　slag　structure.　Based　on　the　coarse-grained　soil　triaxial　test,　a　modified　Duncan-Chang　model　is　compared　with　the　actual　monitoring　results　and　is　found　to　be　suitable　for　the　analysis　of　the　slag　constitutive　model.