Effect of Aggregate Type on Friction and Permeability of Chip Seal Mixtures

Road maintenance and management is one of the most important tasks for road administration in every country. Application of preventive maintenance has been the subject of research for several years. Chip Seal is an option in preventive maintenance reducing the cost and time of rehabilitation. The outcome of the previous researches has revealed that spending a small portion of total cost for maintenance resulted in reduced pavement rehabilitation costs. In this paper after introducing and identification of chip seals, the design and construction of different chip seal is presented. The main purpose of this research is introducing different type of chip seal and evaluating their performance in the laboratory. To fabricate the chip seals effort was made to use the facilities available and simulate the real conditions in the country. In this research, friction, permeability and coating properties of different chip seals was evaluated to make a comparison between different chip seals.