The Study of Temperature Changes on Asphalt Concrete Wearing Course (AC-WC) Mixing Process on Marshall Characteristics

摘要

The use of Asphalt Concrete Wearing Course (AC-WC) on the road pavement has been increased in accordance with the road infrastructure development. However, there are many road defects occurs because of improper material mixing design and mistakes during construction. One of the requirements in material mixing is the precision of temperature, so that aggregate and asphalt strongly bonds. The mismatch of material mixing is becoming one of the causes of road damage such as bleeding. This study aims to determine the effect of temperature on Marshall characteristic including stability, voids in the mix, voids in mineral aggregates and material density. This research used 36 specimens with nine stages methodology: asphalt and aggregate preparation, the specimens making which be tested at various temperature and bitumen content, Marshall test, bitumen stickiness test, softening point, ductility, viscosity, asphalt penetration test, and data analysis. The research results show that mixing temperatures below or above the standard temperature can reduce the stability and density of AC-WC. The bitumen material is very sensitive to temperature changes. The viscosity of asphalt also affects the quality of the asphalt mixture. Referring to the results of this study, the AMP temperature needs to be properly assessed based on the penetration measurement results and the softening point of asphalt. Further research could be conduct to analyze the relationship between Marshall characteristics and various asphalt penetration.