Soil stabilization is the process of improving the engineering properties of the soil and thus makingrnit more stable. In the process of soil stabilization and modification or soil strengthening, emphasisrnis given for maximum utilization of local materials. In this study, cinder and fine grained soil werernblended to be used as sub base material. rnThe research is basically conducted based on the available cinder gravel and fine grained soil foundrnin Durame area. The significance of the study is to provide alternative material for roadrnconstruction, specifically for road sub base construction. The objective of this study is to investigaternthe strength characteristics of mechanically stabilized cinder to be used as sub base material. Anrnattempt has been made in this study to evaluate the potential use of cinder gravel as sub basernmaterial when blended with fine grained soil. rnAccordingly, to achieve the Ethiopia Road Authority manual specification, the cinder gravel wasrnblended with some trail proportion of 0, 10, 20 and 33 % of fine-grained soil by dry weight. In thisrnstudy the conducted tests includes gradation, compaction test, atterberg limits, free swell, specificrngravity, and California Bearing Ratio test. rnLaboratory test results showed that the optimum amount of fine grained soil required to achieve thernERA manual standard specification requirement was found to be 20 %. Laboratory tests conductedrnon specimen prepared using the optimum amount of fine grained soils revealed that cinder gravelrnresponded very well to the fine grained soil treatment, as exhibited in improvement of its gradationrnand plasticity. From the laboratory test results of moisture content vs. density relationship, it hasrnbeen observed that the optimum amount of fine grained soil is 20 % by weight proportion at arndensity of 1.87 g/cc, the range of soaked CBR of the blended mix increases from 64 % to 97 % andrnPI value from zero to 0 % to 6.1 %.