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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL REKA RACANA Jurnal Teknik Sipil Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Jurnal Rekayasa Hijau Jurnal Komposit : Jurnal Ilmu-Ilmu Teknik Sipil Indonesian Journal of Construction Engineering and Sustainable Development Jurnal Jalan Jembatan Asian Journal of Social and Humanities Journal of Green Science and Technology
Hamdhan, Indra Noer
Institut Teknologi Nasional
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Transportation

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Improving Shear Strength Of Expansive Soil Through Asphalt Emulsion And Local Pozzolanic Additives Oktofani, Khansa Nuansa; Syahril, Syahril; Indra Noer Hamdhan; Naess, Victor Firstkiel Feber
Journal of Green Science and Technology Vol 9 No 2 (2025): Journal of Green Science and Technology Vol. 9 No.2 September 2025
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v9i2.10408

Abstract

Expansive clayshale soils pose a significant geotechnical challenge due to their high swell-shrink potential and low shear strength, necessitating urgent development of effective and sustainable stabilization methods. This study explores the stabilization of such problematic soils using a combination of emulsified asphalt (AE) and Bledug Kuwu mud (LBK), a natural pozzolanic byproduct derived from a unique geological phenomenon in Central Java, Indonesia. A total of 51 cylindrical specimens were prepared with a fixed 8% AE content and varying LBK contents (6%, 10%, 14%, and 18%) by dry weight of soil. The mechanical properties were evaluated using Unconsolidated Undrained (UU) triaxial tests, while Scanning Electron Microscopy (SEM) was employed to examine microstructural evolution. The results highlight a marked improvement in shear strength parameters cohesion (c) and internal friction angle (φ)—in tandem with increased LBK content and curing duration. The optimal mixture (18% LBK, 8% AE, and 14 days of curing) showed a significant rise in c from 79.46 kPa to 150.88 kPa and φ from 14.3° to 24.0°, indicating a synergistic interaction between the asphalt binder and pozzolanic compounds. SEM analysis confirmed the formation of a denser and more cohesive matrix, attributed to both the physical encapsulation effect of AE and the pozzolanic reaction products, particularly calcium silicate hydrate (C–S–H) and calcium aluminate hydrate (C–A–H), which enhanced interparticle bonding. These findings underscore the effectiveness and urgency of adopting AE–LBK stabilization as a cost-efficient and environmentally friendly alternative for improving expansive soils. The study provides a foundational basis for field-scale implementation and long-term performance assessment in infrastructure development on marginal ground.
PERBAIKAN NILAI KADAR AIR DAN INDEKS PLASTISITAS TANAH LEMPUNG LUNAK MENGGUNAKAN BAHAN TAMBAH EXPANDED POLYSTYRENE (EPS) DAN RESIDIUM CRACKING CATALYST 15 (RCC 15) shaputra, muhammad rio eka; Syahril; Indra Noer Hamdhan; Geni Firuliadhim
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol. 30 No. 1 (2025): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v30i1.6424

Abstract

The uneven distribution of development in each region can result in construction on land with poor characteristics. One of the soils that has weak characteristics is soft clay. Soft clay has weak characteristics, such as relatively high water content and plasticity index (PI), so it needs to be stabilized to improve its bearing capacity before being used in construction. This study aims to examine the effect of adding Expanded Polystyrene (EPS) which is a fabricated material with Residium Cracking Catalyst 15 (RCC15) which is a waste product of oil processing from PT. Pertamina on improving the characteristics of soft clay. The specimens from Cililin, Bandung Regency, has a soft inorganic clay (CH) with a clay content of 61% and a water content of 37.945%. Test specimens were made with variations in the addition of EPS of 0.4% and RCC15 of 20%, 25%, and 30%. The results of the property index test showed that the addition of RCC15 can increase the water content and plasticity index (PI) value, with the optimum value at a mixture of 0.4% EPS and 25% RCC15. The impact of using EPS and RCC15 as additives has the potential to increase the stability of soft clay, making it suitable for use in construction.
Co-Authors Adrianto Kresnohadi Adrianto Kresnohadi, Adrianto Adrin Tohari Alfafa, Muhamad Fadhlan Arzunnita Pramulandani asep hilman rosadi Ayu Risnawati Azizi Rochman Bahari, Sonny Riantama Bemby S. Dearini J, R. Thasyia Puteri Dedi Rahdianata Desti Santi Pratiwi Desti Santi Pratiwi Devy Dhea Wulandari Eliza, Emilia Erdina Tyagita Utami Fadhillah, Ryan Achmad Fadilah, Rifki Fadjar Mohamad Elfaaz Fadjar Mohamad Elfaaz, Fadjar Mohamad Fauzi, Imron Maulana Fauziah Fitriani Iskandar Fauziah Fitriani Iskandar, Fauziah Fitriani Fikri Yudhistira Nugraha Fikri Yudhistira Nugraha, Fikri Yudhistira Fitri Virliani Anugrah Fitriana, Sena Bayu Adji Frizkia Azifa Silmi Geni Firuliadhim Gibral Maulana Harapan Saragih, Hotma Henoch Leindrio Cornelis Henoch Leindrio Cornelis, Henoch Leindrio Hermawan, Dody Ikhya Ikhya Ikhya Ikhya, Ikhya Imam Aschuri Imron Maulana Fauzi Kabul Suwitaatmadja Ketut Devy Apriyani Ketut Devy Apriyani, Ketut Devy Kurnia, Prana Lesmana, Nirpan Marsya Imara Sabrilia Maulana, Gibral Muhamad Fadhlan Alfafa Muhammad Yanuar Ohoimas Muhammad Yanuar Ohoimas, Muhammad Yanuar Nadya Utami Rivanga Naess, Victor Firstkiel Feber Nanda, Teuku Nabilla Nirpan Lesmana Oktofani, Khansa Nuansa Permatasari, Widya Yunita Pratiwi, Desti Santi R. Thasyia Puteri Dearini J Raden Wahyu Mulyana Raden Wahyu Mulyana, Raden Wahyu Rahdianata, Dedi Rahmah, Rizka Adisya Kamila Rangga Anhar Rangga Anhar, Rangga Rifki Fadilah Rinaldi Alamsyah Riny Yolandha Parapat Rivanga, Nadya Utami Rochman, Azizi Ryan Achmad Fadhillah S., Bemby Sahib, Yasmin Jihan Fahira Sari, Namirah Nurgia Sena Bayu Adji Fitriana Shaputra, Muhammad Rio Eka Silmi, Frizkia Azifa Soegiarso, Roesdiman Sonny Riantama Bahari Suwitaatmadja, Kabul Syahril Syahril Syahril Teuku Nabilla Nanda Utami, Erdina Tyagita Wahab, Dimas Athhariyadi Widya Yunita Permatasari Wijaya Panjaitan, Pita Uli Artha Wulandari, Devy Dhea Yasmin Jihan Fahira Sahib Yessi Nirwana Kurniadi