Stabilization of clayey soils using Bagasse fly ash and lime

Sugarcane bagasse is one of the agro-industry wastes that its maintenance and disposal makes some problems for the factories managers. In this research, the effects of lime and bagasse fly ash on the strength characteristics of a clayey soil were studied. For this purpose, 20 treatments were made by adding of different amounts of lime and bagasse fly ash to a high plastic clayey soil. In such a way four levels of lime including 0, 1, 3 and 4percent and five levels of bagasse fly ash including 0, 2, 5, 8 and 12 percent by dry weight of soil. In addition and bagasse were added to the soil with percentages of 2, 5, 8 and 12 for bagasse ash. Then, considering two curing times (7 and 28 days) and three replications, 6 specimens for each treatment and totally 120 specimens were made by using of Harward miniature compaction apparatus. The prepared samples were then tested for unconfined compressive strength at their curing ages. The results showed that the adding of Bagasse fly ash and lime increases the optimum water content and reduces maximum dry density of the clayey soil. It is also found Furthermore,The combination of 8% sugarcane bagasse ash with clayey soil has increased the compressive strength of soil by 92%. Moreover, addition of bagasse ash to the mixture of clayey soil-lime reduces the amount of unpressurised compressive strength and of the elastic modulus. According to the experimental mixtures, the combination of 2% sugarcane bagasse ash with 4% lime was obtained as the optimum composition.