To optimize the configuration of industrial waste slag in soft soil solidification,phosphogypsum and slag were selected to replace part of cement,and the effects of initial water content,industrial waste slag content,curing age and seawater erosion on the strength of industrial waste-cement solidified soil were compared by unconfined compressive strength and seawater immersion tests.The results show that the compressive strength of phosphogypsum-cement solidified soil increases with increasing curing age and decreases with phosphogypsum content and initial water content.The compressive strength of slag-cement solidified soil increases with the extension of curing age and is more suitable for soft soil with higher initial water content.It first increases and then decreases with the initial water content and slag content.The phosphogypsum-cement solidified sample after seawater immersion got more susceptible to erosion due to the increase in phosphogypsum content and showed more serious cracking and strength loss.The slag-cement solidified soil is more resistant to seawater erosion.The samples do not crack under each dosage,and the strength loss caused by seawater immersion decreases with increasing slag content.
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