Long term strength and durability of clayey soil stabilized with lime

الملخص EN

This study deals with durability characteristics and unconfined compressive strength of clayey soil stabilized with lime.

The tests comprises of unconfined compressive strength for samples stabilized with the optimum lime percent (4 %), and subjected to cycles of the wet-dry, dry-wet and freeze-thaw durability tests as well as, long-term soaking and slake tests The results indicated that, the efficiency of the lime in the improvement of unconfined compressive strength of clayey soil is of negative effect in the long term durability periods the wetting-drying cycles showed greater reduction in unconfined compressive strength than drying-wetting cycles, while the volume change of samples which subjected to drying at first, was greater than those conducted with wetting.

On the other hand, a freezing-thawing cycle causes a decreasing in the unconfined compressive strength values, and the reduction ratio was greater than wetting and drying cases.

But, during soaking tests it was found that at early soaking periods, the lime stabilized samples continuously gaining strength, but beyond this the strength decreased with increasing soaking period.

Finally, the stabilized samples with (4 and 6 %) lime become more durable against the cycles of wetting and drying.