To begin the process of understanding the mechanical behavior of a cement-soft soil mixture, a series of consolidation tests and unconfined compressive strength (UCS) tests were conducted with special attention being paid to the effects of curing time and vertical curing stress. Curing times of 7, 14, 28, 56, 90, and 120 days were used to analyze strength increase due to curing time, while vertical confining pressures of 0, 50, 100, and 200 kPa were used to analyze strength increase due to confining stresses. It is shown that the introduction of cement into soft soils results in decreased compressibility and increased UCS. Also, the UCS of the cement-soil mixture increased with curing time and with vertical confining stress. The stiffness of cement-soil mixture can be significantly increased when the mixture is cured under vertical curing stress. The existence of fiber in the cement-soil mixture can significantly improve ductility in the post-peak strength zone without significantly changing the UCS.
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