Abstract
In order to study the effect of incorporation of Ni-Fe slag powder into soil-cement on its early strength, the unconfined compressive strength test and SEM test at 7d age and 28d age were conducted on the soil-cement with incorporation of 0%, 10%, 20%, 30% and 40% of Ni-Fe slag powder respectively. The test results showed that the soil-cement strength decreased with the increase in the content of Ni-Fe slag powder, especially at the age of 7d, the soil-cement strength decreased significantly, and the failure strain was also large, showing greater plasticity; at the age of 28 days, the reduction rate of soil-cement strength gradually decreased. Therefore, the contribution of Ni-Fe slag powder to the soil-cement strength was very small at the age of 7d, and it only gradually played its role at the age of 28d.
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