Utilization of Recycled Asphalt with the Addition of Crushed Stone Ash as a Lataston Mixture for Flexible Pavement Construction: Case Study of Dredging Old Pavement on Jalan Wates Street KM 12

Abstract

Purpose: The purpose of this study is to find the Optimum Asphalt Content in recycled asphalt, know the characteristics of marshall in recycled asphalt, and find out the flexibility and resistance in the use of recycled asphalt with the addition of crushed stone ash.

Methods/Design: The methods used in this study are experimental and qualitative. The research was conducted by utilizing asphalt waste (asphalt recycle) obtained from the results of road dredging on Jl. Wates, KM 12, Sedayu, Sleman, Yogyakarta.

Findings: Asphalt waste is substituted with asphalt pen 60/70 as a rejuvenating material and filler is added using crushed stone ash. The planned new asphalt mixture is with percentage variations of 2%, 2.5%, 3%, and 3.5%. Meanwhile, the ash content of crushed stone as a planned filler is 3%, 5%, and 7%. The optimum asphalt content (KAO) obtained on new asphalt for recycled asphalt mixture meets the specifications of the Hot Paved Mixture Layer Implementation Guidelines (2007) at 3% asphalt content, while for crushed stone ash as filler, the Optimum Asphalt Content (KAO) value is obtained at 5% crushed stone ash content. In the use of recycled asphalt for Lataston bending pavement with the addition of crushed rock ash to marshall parameters, Stability values of 1765.10 kg, Density 2.31 gr / cc, Flow 3.11 mm, and Marshall Qoutient 567.56 mm / kg were obtained

Practical implication: Utilization of asphalt recycling with the addition of ash Stone as a Lataston mixture for flexible pavement can improve the quality of flexible pavement by combining recycled asphalt and stone ash in the Lataston mixture. it can also contribute to improving road construction technology and practices, which can benefit the construction industry and society.