Prediction of Collapsibility and Plasticity properties of the Soil Stabilized by Polymer Additive for construction

Collapsible soils are a category of natural soils that are associated with problems. In other words, under a uniform tension, their volume will be reduced to a great extent due to increasing humidity. This decreased volume will destroy the soil's structure and will finally lead to a significant settlement. The existence of such soils in many parts of the world including central parts of Iran, e.g. Kerman province, requires conducting studies on the behavior and properties of collapsible soils. In this study, the impact of butadiene rubber on the stabilization of these soils has been investigated. The fine-grained soils in this study have been taken from two different sites and they've been stabilized through injecting different percentages of butadiene rubber (number of experiments=84). The stabilized soils have been evaluated through ASTM D5333 double consolidation. Besides, Atterberg's properties have been studied on non-manipulated soil samples. The penetrations of butadiene rubber as well as formed beams of butadiene rubber results in the reduction of studied soil's collapsibility. Furthermore, it resulted in lowering down fluidity property in soils with a high fluidity rate and vice versa, i.e. will result in increased fluidity in low-fluidity soils. Considering the development of smart systems in the prediction of stabilized collapsible soils' behavior, this study predicts the collapsibility potential and Atterberg's limits of soil samples stabilized using butadiene rubber through ANFIS model. The accuracy of this model has been investigated as well and the results are analyzed.