Relationship between cone index and shear strength of remolded clayey soil

In order to acquire the cone index (CI) and shear strength (SS) of the remolded soil, quantification of the adhesion and traction performance of wheeled vehicle and its trafficability on clayey soil were conducted by remolding the soil with non-standard proctor compaction and performing micro-penetration and shearing tests. A threshold value of soil moisture content, 23% by mass, was found to change the trend of CI and SS with variety of soil water content. Below this threshold value, both CI and SS were found to follow a 2nd order polynomial trend with variety of water content increase, while higher above this value, the correlation between CI and soil moisture content or SS and soil moisture content vanished. Another notable result was an overall linear correlation between CI and SS of the remolded soil when its water content was lower than the threshold value.