Cold recycled asphalt has been utilized to overcome high energy consumption and working temperature and low recycled pavement material percentage in hot mix asphalt and concrete pavement [1]. Up to dates, asphalt recycling on site called as Cold In-Place Recycling (CIR), Cold Central Plant Recycling (CCPR) and even hot recycling technologies have been developed and applied to the fields, but limitations such as poor adhesion between gravel and asphalt, slow hydration time, bleeding pavement are reported, respectively [2, 3, 4]. Among these issues, hydration time and initial strength in application are all related to the property of mineral filler influencing the mechanical property of pavement mixture. Due to these reasons, there have been continuous needs to develop new mineral filler to overcome previously reported issues by with the respects of mineral composition, hydration reaction and surface reaction enhancement. In this study, several natural minerals such as alumina, silicate, and calcium oxide were utilized as raw materials and following characterizations using SEM, EDS, XRD, and BET were performed to evaluate materials properties and suggest research directions for the optimum mineral filler development.

• Hosang Ahn(Korea Institute of Civil engineering and building Technology)
• Yeong-min Kim(Korea Institute of Civil engineering and building Technology)