Effects of CBR+ nano materials on mechanical resistance and chemical characteristics of forest roads runoff

In this study, Nano-polymer CBR PLUS is sued for soil stabilization in forest roads. Tests were carried out to identify the texture, Atterberg limits, compaction and CBR on the control and treated soil samples with different percentage of 0.25%, 0.50%, 0.75% and 1%. In order to study the mechanical characteristics of upper layer, five plots including one control plot (untreated) and four sample plots were carried out on forest road. The results showed that the Nano-polymer reduced liquid and plastic limits. By increasing the percentage of CBR PLUS, the soil fine particles decreased in control and treated samples, in which that 1% treatment has the minimum content in weight percent of soil fine particles and maximum content in coarse particles compare to other treatments. Also soil treated with CBR PLUS, reduces the optimum moisture content and increases maximum dry density and California Bearing Capacity (CBR). Investigation of chemical properties showed that the amount of Calcium, Magnesium and Potassium increased in runoff. It was concluded that 1% of Nano-polymer CBR PLUS acted better in comparison with other treatments.