Evaluation of plant-produced porous warm-mix asphalt mixture using LEADCAP additive

Warm-mix asphalt (WMA) technology was applied for asphalt mixture, plant-produced porous WMA using LEADCAP additive (porous WMA-LEADCAP) test section was built and compacted at 30 °C lower than porous hot-mix asphalt (porous HMA) test section. Marshall mix designs were conducted for porous WMA-LEADCAP mixture and porous HMA mixture in terms of Marshall stability, Cantabro loss and dynamic stability. The workability, compactablity and surface quality of porous WMA-LEADCAP pavement were investigated, and the engineering properties of plant-produced porous WMA-LEADCAP mixture and plant-produced porous HMA mixture were evaluated based on indirect tensile strength test and dynamic immersion test. Analysis result shows that LEADCAP additive does not affect polymer-modified asphalt in terms of penetration, softening point, viscosity, ductility, toughness and tenacity. Porous WMA-LEADCAP pavement has similar field density, permeability and smoothness compared with standard porous HMA pavement. Plant-produced porous WMA-LEADCAP mixture is equivalent to plant-produced porous HMA mixture in indirect tensile strength, toughness and stripping resistance.