Abstract:
The present study aims to explore the effectiveness of some available anti-dust agents in controlling the rutting of unpaved road surface through the experimental instrument developed to simulate the process of rutting development on the field under the influences of moisture content, wheel contact load and method of additive application on the rutting resistance. This anti-dust agents used were the hydrated lime and other organic anti-dust agents, i.e. natural rubber, monosaccharide, and magnesium chloride. The experiment is divided into 2 main parts. The first part concern the mixing the agents with lateritic soil after compacting it as required while in second part, the same agents are mixed with the soil before it is evenly compacted. Included in this experiment are the measurement of moisture of the soil surface, the measurement of the depths of the ruts, and the amount of the soil dropping from the wheel every 2,000 rounds. At the end of 12,000th round, through the observation of the depths of the ruts, the amount of the soil dropping and the changes in moisture, in comparison with the result of mixing water with the compacted lateritic soil, the experiment reveals that the soil mixed with hydrated lime is the most effective organic anti-dust agent in reducing the rutting development than the others, as it can curb the rutting by 53.7 %. Therefore, this comes to prove that reactive additives can increase the cohesion between the soil elements better than the coating substances do.