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All Journal Jurnal Linears Prosiding Seminar Nasional Teknik Sipil UMS
Nabil Belantara Kusuma
Universitas Muhammadiyah Surakarta
Civil Engineering, Building, Construction & Architecture Engineering

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Pengembangan Paving Block untuk Jalan Usaha Tani menggunakan Bottom Ash Residu Pembakaran Sampah Domestik Nur Khotimah Handayani; Alfia Magfirona; Angger Adi Bastian; M. Rizki Faisal Fadhillah; Nabil Belantara Kusuma
Prosiding Seminar Nasional Teknik Sipil UMS 2026: Prosiding Seminar Nasional Teknik Sipil UMS
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

Peningkatan volume sampah domestik mendorong pemanfaatan residu pengolahan, salah satunya bottom ash dari proses insinerasi sampah padat perkotaan. Penelitian ini bertujuan mengembangkan paving block untuk jalan usaha tani dengan memanfaatkan bottom ash tersebut sebagai substitusi agregat halus sebesar 30%, dan 50%, dengan perbandingan semen dan pasir 1:3. Pengujian meliputi kuat tekan dan daya serap air mengacu pada SNI 03-0691-1996. Hasil penelitian menunjukkan bahwa peningkatan kadar bottom ash menyebabkan kenaikan daya serap air dari 2,61% menjadi 17,86% serta penurunan kuat tekan dari 27,83 MPa menjadi sekitar 10,76 MPa. Variasi tanpa bottom ash menghasilkan mutu terbaik (mutu B), sedangkan variasi 30% dan 50% masih memenuhi mutu D. Peningkatan daya serap air dan penurunan kuat tekan dipengaruhi oleh tingginya porositas material akibat penggunaan bottom ash tanpa perlakuan awal. Meskipun demikian, bottom ash tetap berpotensi dimanfaatkan sebagai material alternatif untuk paving block pada jalan usaha tani dengan beban ringan, terutama untuk aplikasi non-struktural. Namun, karakteristiknya yang masih memiliki porositas tinggi dan potensi kandungan kontaminan menyebabkan kinerjanya belum stabil. Oleh karena itu, hasil penelitian ini menegaskan perlunya penerapan perlakuan awal pada bottom ash yang tepat untuk meningkatkan kualitas dan konsistensi kinerja material bottom ash sebelum digunakan.
Life Cycle Assessment of Reinforced Concrete Beam Work for Environmental Hotspot Identification and Mitigation Tsulis Iq'bal Khairul Amar; Alfia Magfirona; Nabil Belantara Kusuma; Aditya Restu Hapriyanto
Jurnal Linears Vol. 9 No. 2 (2026): Jurnal LINEARS
Publisher : Universitas Muhammadiyah Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26618/wvfqy095

Abstract

Reinforced concrete structural work requires substantial materials, energy, and transportation, which may generate environmental burdens throughout construction-related processes. This study identifies environmental hotspots in reinforced-concrete beam work and establishes mitigation priorities using Life Cycle Assessment (LCA). A case study was conducted on Project X in Magelang Regency by aggregating two beam groups into one beam-work system comprising 1,935.78 kg of reinforcing steel, 42.805 m² of formwork, and 4.290 m³ of ready-mix concrete. The functional unit was defined as 1 m³ of installed reinforced-concrete beam work, while the system boundary covered material production, transportation to the construction site, and construction activities. Modelling used SimaPro-derived inventory data and ecoinvent datasets with ReCiPe 2008 Midpoint (H) v1.13. The climate-change impact was approximately 5.62 × 10³ kg CO₂ eq, equivalent to about 1.31 × 10³ kg CO₂ eq/m³. Reinforcing steel was the principal hotspot, contributing approximately 69.6%, followed by cement at 21.5% and plywood at 4.3%. Sensitivity analyses of concrete composition, steel representation, formwork reuse, and transportation confirmed that reinforcing steel remained the dominant hotspot. Literature-based validation indicates that mitigation should prioritize reinforcement efficiency, fabrication-waste reduction, lower-impact steel procurement, cement efficiency, formwork reuse, and logistics optimization.      
Co-Authors Aditya Restu Hapriyanto Alfia Magfirona Angger Adi Bastian M. Rizki Faisal Fadhillah Nur Khotimah Handayani Tsulis Iq'bal Khairul Amar