Abstract
This study deals with the effect of xanthan gum and sodium alginate biopolymers on the consistency, compaction, and strength properties of clay. Atterberg limits tests, standard proctor compaction tests, and unconfined compression tests were performed. The curing time of the specimens varied from 7 to 56 days. Xanthan gum ratios were %0.5, %1, %1.5, %2, %3 and sodium alginate ratios were %1, %2, %3, %4. As a result, a noticeable increase in liquid limit was observed in both biopolymers. Plastic limit and plasticity index of the specimens showed minor changes compared to the liquid limit of the soil specimens. Optimum water content of the clay specimens with additives was %2 higher compared to that of the untreated clay. Maximum dry density slightly decreased compared that of the untreated clay. The results of unconfined compressive tests showed that using xanthan gum and sodium alginate biopolymers had the beneficial effect of increasing the strength of the soils.
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