Study on the Durability of Iron-doped Tailings Cement Soil Under Dry-wet Cycle
In order to explore the durability of iron-doped tailings cement soil under complex environ-mental conditions,the dry-wet cycle test of iron-doped tailings cement soil was carried out,and compared with plain cement soil under the same conditions.The dry and wet cycle test found that the strength loss of high-content cement is low.The incorporation of iron tailings sand will delay the strength loss caused by the increase of the number of dry and wet cycles of cement soil,but with the increase of the number of dry and wet cycles,its strength loss gradually approaches that of solid cement soil,and the decrease in the strength of iron tailings cement soil caused by dry and wet cycles is mainly reflected in the large decrease in cohesion and small change in internal friction angle.Using the relationship between ultimate deflection stress(σ1-σ3)max,c,φ value and porosityη,cementite volume content Gv and other parameters,the strength damage model of iron tailings cement soil under the action of dry and wet cycle and freeze-thaw cycle was established,and the damage model can effectively predict the ultimate deflection stress(σ1-σ3)max and c,φ value of iron tailings cement soil under dry and wet cycle by comparing the calculated value with the experi-mental value.
Dry-wet cycleiron tailingscement-soiltriaxial damage model
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