Stripping is defined as the breaking of the adhesive bond between an aggregate surface and asphalt cement in an asphalt concrete. Lime is added as an anti-stripping agent and filler in asphalt concrete, to reduce the phenomenon of stripping. There are many things that affect stripping such as the electrical charge of a surface (Zeta Potential), the particle charge, the pH value, the silica content of an aggregate, acid rain, intensity of the rain, type of asphalt cement, voids in the specimen, characteristics of the filler and its compact capability during construction. In this study, we found that the best proportions for an asphalt concrete were 1% lime (by weight of the mixture), 3% mineral filler and 5.5% asphalt content. This mixture was found to be the most efficiency in the improvement of the stripping resistance of asphalt mixtures. The use of lime in asphalt cement can reduce temperature susceptibility and penetration, increasing the viscosity and softening point of the asphalt materials, which will improve the pavement resistance to rutting, shoving, bleeding, cracking and aging phenomenon . The use of an artificial environmental conditioning system (AECS) effectively simulated the conditions of acid rain on pavements, so it should will be worth while to develop this system to study the behavior of immersed asphalt mixtures, The application of the tensile strength ratios from the ASTM D4867 standard at the same time as the correction formula should exactly evaluate the stripping potential of asphalt mixtures under acid rain conditions. (A)
Abstract