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Part of roads in Merauke Regency are damaged because of the soil supporting power is soft and not enough to get advantages if it is used as sub-grade soil. One of the ways to handle it is to carry out the mechanic as well as mechanic stability by using additional material. This research intends to know the California Bearing Ratio (CBR) value of subgrade, to know the effect of lime content due to the CBR of clay, the CBR value of sub-grade after being added with lime content, and to know the unconfined compressive strength value of sub-grade and soil after being mixed with lime. .The methodology consists of experimental method by using the mix of clay on the road of Kuda Mati-Tanah Wali-Wali, Merauke Regency with the lime from Wakatobi Regency due to the lime percentage variety of 3%, 6%, 9%, and 12%. Then, it is carried out the test of Atterberg limits, density, CBR swelling, CBR soaked, and test of unconfined compressive strength. The test is due to the lime percentage variety as above and the results of unconfined compressive strength value are 2,024 kg/cm2 ; 5,434 kg/cm2 ; 6,458 kg/cm2 ; 7,689 kg/cm2 ; and 7,019 kg/cm2 . Results show that the sub-grade on the road of Kuda Mati-Tujuh Wali-Wali is as clay. Lime can change the soil characteristic better and it can increase the CBR of clay soil and increasing the value of soil unconfined compressive strength Keywords: stability, clay, soil

The Effect of Soft Soil Stabilization By using Lime as the Basic Soil Strength Material for Road in Merauke Regency