Civil Engineering and Architecture 12(1): 1-14, 2024 http://www.hrpub.org DOI: 10.13189/cea.2024.120101 Effect of High Recycled Aggregate Content in Hot Mix Asphalt on Volumetric and Skid Resistance Characteristics Sigit Pranowo Hadiwardoyo 1,* , R Jachrizal Sumabrata 1 , Riana Herlina Lumingkewas 2 , Tommy Iduwin 1 , Hermon Frederik Tambunan 1 , Silvanus Nohan Rudrokasworo 1 , Primetta Tatiana 1 , Aditya Fadhel 1 , Zahran Athalla 1 1 Department of Civil Engineering, Faculty of Engineering, Universitas Indonesia, Indonesia 2 Civil Engineering Study Program, Institut Teknologi Indonesia (ITI), Kampus Puspiptek Serpong, Indonesia Received January 21, 2023; Revised September 15, 2023; Accepted October 12, 2023 Cite This Paper in the Following Citation Styles (a): [1] Sigit Pranowo Hadiwardoyo, R Jachrizal Sumabrata, Riana Herlina Lumingkewas, Tommy Iduwin, Hermon Frederik Tambunan, Silvanus Nohan Rudrokasworo, Primetta Tatiana, Aditya Fadhel, Zahran Athalla, "Effect of High Recycled Aggregate Content in Hot Mix Asphalt on Volumetric and Skid Resistance Characteristics," Civil Engineering and Architecture, Vol. 12, No. 1, pp. 1 - 14, 2024. DOI: 10.13189/cea.2024.120101. (b): Sigit Pranowo Hadiwardoyo, R Jachrizal Sumabrata, Riana Herlina Lumingkewas, Tommy Iduwin, Hermon Frederik Tambunan, Silvanus Nohan Rudrokasworo, Primetta Tatiana, Aditya Fadhel, Zahran Athalla (2024). Effect of High Recycled Aggregate Content in Hot Mix Asphalt on Volumetric and Skid Resistance Characteristics. Civil Engineering and Architecture, 12(1), 1 - 14. DOI: 10.13189/cea.2024.120101. Copyright©2024 by authors, all rights reserved. Authors agree that this article remains permanently open access under the terms of the Creative Commons Attribution License 4.0 International License Abstract Friction between vehicle wheels and the road surface is influenced by the performance of the asphalt mixture that forms the road surface. New road construction and maintenance programs require pavement materials that come from natural sources. Efficiency in using materials to preserve the environment can be achieved by recycling. The road surface layer can be recycled 50-60% so that old material can still be utilized by adding new aggregate at a certain gradation size. This research shows the performance of recycled Hot-mix Asphalt (HMA), which consists of a mixture of 50% recycled asphalt and a mixture of 50% recycled asphalt + 27% recycled cement concrete aggregate, compared to the new material HMA mixture. The aggregate recycled asphalt mixture of 77% and WEO utilization of 15% still show skid resistance performance close to that of the new aggregate asphalt mixture. This research shows that using large amounts of waste aggregate and waste engine oil can reduce the use of new materials on road pavement. Keywords Recycle Material, Hot-Mix Asphalt, Skid Resistance, Green Environment, Pavement 1. Introduction Skid resistance is the force that occurs when the vehicle wheels are prevented from rotating/sliding along the pavement surface. This value is an important parameter that affects driving safety on the road, which is influenced by weather conditions, where the value decreases when the temperature increases. Road pavements have three essential functions: safety, comfort, and service efficiency. In evaluating the safety of road pavements, a survey was conducted on texture and road roughness (skid resistance) [1]. Skid resistance is defined as the resisting force acting on the vehicle wheels along the road surface when braking, which is influenced by driving speed, vehicle wheels, road conditions, environmental factors, and the texture of the road surface. Road pavement macrotextures, influenced by aggregate characteristics, are believed to prevent aquaplaning on vehicle wheels [2]. Skid resistance is influenced by two components, namely adhesion and hysteresis. Adhesion comes from molecular bonding in areas with high local pressure due to the unevenness of the road surface. At the same time, hysteresis occurs due to loss of energy. This condition is affected by the deformation of the tire rubber around the