Characteristic of Coconut-Shell Ash as Filler and LDPE Plastic Waste as Substitution Materials of Porous Asphalt Mixtures

Abstract

 Abstract: Porous asphalt is designed to have a relatively higher porosity than other pavement types, this porous property is obtained because the proportion of fine aggregate is less than other types of mixtures. In an effort to increase the strength of porous asphalt pavement structures, it is required to use other added materials both as additives, stabilizers and substitution materials. In this study, the added material used was low density polyethylene (LDPE) plastic waste as a substitute for asphalt and coconut-shell ash (CA) as filler substitution material. Stone ash, cement and fly ash are commonly used as fillers in asphalt mixture, CA is expected to be one of the alternatives. This study aims to determine the characteristics of using LDPE into asphalt pen. 60/70 and the use of 50% CA filler on the characteristics of porous asphalt mixture and to find out indications of deficiencies and strengths in the asphalt mixture. On the initial bitumen content without using substitutes, the optimum bitumen content (OAC) was 5.76% with the variation used of LDPE 3%, 5% and 7% and 50% CA as filler. At OAC value 5.76% with 3% LDPE substitution meet all required parameter. With the value of Marshall Stability, VIM, Flow, AFD, and CL are 560.50kg, 18.61%, 4.3mm, 0.22% and 19.69% respectively.

A Comparative Study of Porous Asphalt Strength Reinforced with Expanded Polystyrene Foam and Ash-Based Fillers: Cantabro Test Findings

“…As a result, there is an increasing demand for environmentally sustainable approaches in road infrastructure construction to effectively tackle these ecological challenges [2]. In recent years, there has been increasing interest in using waste materials as construction materials as an alternative to traditional methods [3]. This approach not only addresses waste management issues but also contributes to sustainability.…”

“…Incorporating XPS into porous asphalt mixtures for road construction presents a viable solution that tackles waste IOP Publishing doi:10.1088/1755-1315/1303/1/012037 2 management challenges while promoting sustainable practices [5]. Furthermore, the utilization of ash powder generated from agricultural and industrial activities can serve effectively as filler material in porous asphalt mixtures, thereby mitigating the environmental impact associated with waste generation [3], [6].…”