The Influence of Fine Waste Lime on the Bearing of Soft Soil

چکیده

This study comprehensively investigates the compaction and bearing characteristics of subgrade soil (clay) with hydrated lime. The materials were used, namely, clayey soil and lime. The standard Proctor compaction test was conducted on the specimens under various moisture conditions. Based on the California bearing ratio (CBR) test, the influence of lime on the bearing values of soft clay specimens was also discussed. Clay-lime (C-L) specimens were prepared by mixing dry clay with five proportions of lime (0, 2, 4, 8, and 12%). The experimental results showed that the responses of the mixtures are very sensitive to the amount of lime. According to the compaction test, the sensitivity of C-L mixtures to the water variations gradually increased with the lime content. An increase in the optimum moisture content (OMC) of the mixtures was noticeable with increasing the lime content. A negative correlation was noticed in the maximum dry density (MDD) as the lime content increased. Furthermore, a significant improvement in the California bearing ratio (CBR) of the C-L mixtures was found when mixed with lime. The variation in lime content also played a vital role in increasing the CBR ratio of the C-L mixtures. 12% of lime caused increasing the CBR of the C-L mixture from 1.7 to 7.55%.