ANALYSIS OF DURABILITY OF ASPHALT CONCRETE-WEARING COURSE (AC-WC) MIXTURE INCORPORATING PG76 ASPHALT AND WASTE GLASS POWDER AS FILLER AGAINST WATER IMMERSION

• Main Author: Estiqomah, Fitria
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/73791
• Institution: Institut Teknologi Bandung

<p align="justify"> Wearing course asphalt concrete is known as the layer located on the upper of the pavement layer consisting of asphalt as binder and aggregate possessing continuous gradation. Due to the overloading and high surface temperature issues that may cause early damage in pavement, conventional asphalt is no longer able to tackle these problems. Hence, performance-graded asphalt is gradually used as binder in concrete asphalt mixture to provide better performance resolving these problems. In asphalt concrete mixture, specifically the one using continuous gradation, filler is one of the constituents having significant impact on the performance as it increases the strength and fills the void in mix. There are various types of fillers that have been widely used in asphalt concrete mixture such as stone dust, Portland cement, and limestone. One of the alternatives of conventional fillers is waste glass powder recognized for its high content of silica. This study aims to investigate the effect of the utilization of waste glass powder as filler on the resistance of asphalt mixture to water immersion. One of the main causes of pavement deterioration is water that may cause loss of adhesion between asphalt and aggregate. In this research, the conventional filler namely stone dust, was replaced by waste glass powder with a proportion of 0%, 50%, and 100%. The performance of various mixtures was analyzed using Marshall test, indirect tension test, and wheel tracking test. The Marshall test results showed that the higher the waste glass powder content as filler replacement, the higher the void in mixture and the stability. On the other hand, it also decreased flow. In mixture using optimum binder content, the results showed that replacing 50% of the stone dust filler with waste glass powder increased Marshall stability, decreased flow, and enhanced retained Marshall stability. ITS results showed mixture using 50% of waste glass powder exhibited the highest retained indirect tension strength indicating its resistance to water damage. In addition, mixture with proportion of 50% waste glass powder had the greater ability resistance to rutting deformation. It can be concluded that waste glass powder is a viable option as a partial replacement of filler in asphalt concrete.