Investigating the use of natural additives to repair and stabilize clay soils in order to improve the environment

The aim of this research is to investigate the possibility of repairing and stabilizing clay soils through the use of natural additives. The type of purpose is practical and the method of laboratory performance. Three types of additives including rice husk ash, nanokitin and lime with different weight percentages were added to the primary clay and examined separately. Axial, compressive and adhesion tests were performed and the final results were performed with peripheral scanning electron microscope and X-ray spectroscopy. The results showed that adding different percentages of nanocytin and rice husk ash resulted in much lower reductions in the dough index and improved the dough index and dough characteristics of the problem soils. Also, all the different compounds and different weight percentages of the three substances lime, nanocitin and rice husk ash, have led to a favorable increase in compressive strength of the sample of the first tested soil. When 6% of lime is added to the initial soil sample, the compressive strength increases optimally and effectively, and compared to the results of the initial soil resistance, the increases are 72, 118, 132 and 154%, respectively, during the operation. 7, 28, 42 and 90 day yields were obtained in the resistance of the samples and this increase was desirable and significant. In all specimens, in all periods of processing, adhesion to the primordial soil sample has been on the rise.