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Sihombing, Atmy Verani Rouly
Jurusan Teknik Sipil, Politeknik Negeri Bandung
Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Public Health Social Sciences Transportation Other

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Pengaruh Bioaspal terhadap Modulus Kekakuan Bitumen Asbuton (Dynamic Shear Rheometer dan Pendekatan Model Matematis Ullidtz) Sihombing, Atmy Verani Rouly
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil Vol. 10 No. 1 (2026)
Publisher : Universitas Ibn Khaldun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/komposit.v10i1.22984

Abstract

This study investigates the effect of bio-binder addition on the stiffness modulus of Buton asphalt (Asbuton) bitumen using the Ullidtz mathematical approach and Dynamic Shear Rheometer (DSR) testing. Asbuton B 50/30 was modified with bio-binders derived from pyrolysis of coconut shells (BTK) and rice straw (BJe). The optimum bio-binder content was determined based on penetration and softening point values comparable to Pen 60/70 asphalt as the control binder. The results indicate that 6.5% BTK and 8% BJe effectively increased penetration and reduced the softening point under RTFOT conditions, demonstrating a significant softening effect. The calculated stiffness modulus (Sbit) from the Ullidtz model and DSR measurements exhibited a consistent decreasing trend with increasing temperature (20–45°C), reflecting the viscoelastic behavior of asphalt. However, the Ullidtz approach generally underestimated stiffness values compared to DSR results, particularly at higher temperatures and for modified binders. An adjustment factor of 1.16 was applied to improve the agreement between both methods. The findings confirm that bio-binders have strong potential as sustainable modifiers to control the stiffness of Asbuton bitumen. While the Ullidtz approach provides a practical preliminary estimation, DSR testing remains more reliable for accurately characterizing the mechanistic and viscoelastic behavior of modified asphalt binders.
Co-Authors Aditia Febriansya Aghnia Monica Saniy, Aghnia Monica Andri Krisnandi Somantri Antonius Siswanto Antonius Siswanto Asep Sundara Bambang Sugeng Subagio Bambang Sugeng Subagio Daniel Octova Agusaputra Dewi Amalia Eri Susanto Hariyadi Ery Radya Juarti, Ery Radya Fadilah, AM Khoirul Fadilah, Linda Winarni Fadillah, Sekar Firdayanti Hamdan Kurnia Harmein Rahman Irhas, Farhandi Ali Irvayana, I Putu Dika Khairunnisa, Madhu Krisologus, Yulianto Petrus Maulinda, Derina Mulyadi Yuswandono Nadia Azhari Alfiyyati Nursyafril Nurul Fauziah Pratiwi, Yola Widi Prayogo, R. Desutama Rachmat Bugi Putri Tiara Kasih Retno Utami Retno Utami Reza Phalevi Sihombing Rizky, Ajeng Meiliana Ruth Esther Ambat S Syahril Salma Fadhilah Suryadi Setyaningrum, Dewi Janti Shafa Liza Ainy Siahaan, Alif Zhorif Kafi Azana Sirait, Togar Situmorang, Jhonassen Morientes Sugiyanto, Martinus Agus Sukandar, Beny Mulyana Surbakti, Destiadi Pindonta Syahputra, Muhammad Rangga