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All Journal Media Teknik Sipil MEDIA KOMUNIKASI TEKNIK SIPIL Research Report - Engineering Science Jurnal Teknik Sipil U Karst APPLIED RESEARCH ON CIVIL ENGINEERING AND ENVIRONMENT (ARCEE) CRANE: Civil Engineering Research Journal Journal of Sustainable Construction Jurnal Teknik Sipil dan Perencanaan
Herry Suryadi Djayaprabha
Faculty Of Engineering, Parahyangan Catholic University, Jl. Ciumbuleuit No. 94, Bandung 40141, Indonesia
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering Materials Science & Nanotechnology Transportation

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Kajian Eksperimental untuk Mengukur Kinerja Ground Granulated Blast Furnace Slag sebagai Pengganti Sebagian Semen terhadap Kekuatan Tekan dan Sorptivitas Self-Compacting Mortar Samudra, Nenny; Djayaprabha, Herry Suryadi; Darapuspa, Diana
Journal of Sustainable Construction Vol 4 No 1 (2024): Journal of Sustainable Construction
Publisher : Universitas Katolik Parahyangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26593/josc.v4i1.7805

Abstract

Peningkatan pembangunan infrastruktur di Indonesia, berdampak pada permintaan semen yang semakin meningkat. Industri semen menyumbangkan sekitar 8% emisi karbondioksida di dunia yang signifikan memberikan dampak buruk bagi lingkungan. Ground Granulated Blast Furnace Slag (GGBFS), yang merupakan limbah indutri padat, dapat dimanfaatkan menjadi salah satu alternatif bahan substitusi sebagian semen untuk membuat material konstruksi yang ramah lingkungan. Penelitian ini bertujuan untuk mengetahui pemanfaatan limbah industri yaitu GGBFS sebagai substitusi semen pada mortar mutu tinggi untuk membuat self-compacting mortar (SCM). Variasi substitusi sebagian semen dengan GGBFS yang diambil untuk membuat SCM adalah sebesar 0%, 10% dan 20%. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh dari sustitusi sebagian semen dengan GGBFS terhadap kekuatan tekan dan sorptivitas. Rasio air terhadap binder (w/b) diambil sebesar 0,3. Berdasarkan hasil yang telah diperoleh, kekuatan tekan SCM pada variasi 20% mencapai 61,8 MPa pada umur 28 hari. Pada campuran yang sama, diperoleh nilai initial absorption sebesar 0,0076 dan secondary absorption sebesar 0,0024 yang mengindikasikan campuran dengan substitusi sebagian semen dengan GGBFS sebesar 20% memiliki tingkat penyerapan air yang rendah dan memiliki durabilitas yang baik. Pemanfaatan GGBFS sebagai substitusi sebagian semen memiliki manfaat yang positif untuk menciptakan material konstruksi yang ramah lingkungan.
Kajian Pemanfaatan Slag Feronikel dan Silica Fume Sebagai Pengganti Sebagian Semen Terhadap Kekuatan Tekan dan Tarik Belah Mortar Struktural Djayaprabha, Herry Suryadi; Joti, Sila
Journal of Sustainable Construction Vol 4 No 2 (2025): Journal of Sustainable Construction
Publisher : Universitas Katolik Parahyangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26593/josc.v4i2.9223

Abstract

Pembangunan infrastruktur yang semakin meningkat akan menyebabkan bertambahnya konsumsi semen secara global. Penggunaan semen sebagai material konstruksi utama menyebabkan peningkatan emisi karbon dioksida (CO2) sekitar 5-10% dari total emisi global. Emisi ini berdampak negatif terhadap lingkungan, termasuk penipisan lapisan ozon. Untuk mengurangi dampak negatif tersebut, perlu diupayakan material alternatif untuk dimanfaatkan sebagai bahan penggantian sebagian dari semen. Kajian ini mengevaluasi pengaruh penggantian sebagian semen dengan slag feronikel (SFN) dengan variasi sebesar 0 wt% hingga 30 wt% terhadap kekuatan tekan dan tarik belah mortar struktural. Hasil pengujian kekuatan tekan pada 28 hari menunjukkan bahwa mortar dengan substitusi SFN sebesar 0, 10, 20 dan 30 wt% memiliki kekuatan tekan sebesar 43,4 MPa, 51,5 MPa, 43,8 MPa, dan 29 MPa. Sedangkan, pada pengujian kuat tarik belah diperoleh nilai substitusi masing-masing adalah 1,4 MPa, 1,7 MPa, 1,6 MPa, dan 1,4 MPa untuk substitusi SFN sebesar 0, 10, 20 dan 30 wt%. Substitusi SFN sebesar 10 wt% memiliki kinerja terbaik yang dapat meningkatkan kekuatan tekan dan tarik belah sebesar 18,7% dan 25,4% apabila dibandingkan dengan campuran tanpa penggantian dengan SFN. Fenomena ini menunjukkan potensi pemanfaatan SFN dapat memberikan dampak positif sebagai material alternatif yang efektif untuk meningkatkan properti mekanis mortar yang lebih ramah lingkungan.
Performance Index-Based Multi-Criteria Optimization of GGBFS Replacement in Concrete for Enhanced Strength, Durability, and Sustainability Mlodi, Lodgar Gabriel; Herry Suryadi Djayaprabha
Jurnal Teknik Sipil dan Perencanaan Vol. 27 No. 2 (2025): Jurnal Teknik Sipil dan Perencanaan
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v27i2.29679

Abstract

Using ground granulated blast furnace slag (GGBFS) as a partial replacement for ordinary Portland cement (OPC) has emerged as a sustainable alternative in concrete production, offering notable improvements in durability and long-term strength. However, identifying the optimal replacement level that balances mechanical performance, durability, and sustainability remains challenging. This study addresses this gap by critically reviewing sixteen peer-reviewed studies conducted between 2006 and 2025, the broadest dataset yet applied in a performance index (PI)-based evaluation. A PI was developed to normalize and compare diverse mechanical and durability parameters, integrating them into a multi-criteria framework. The PI was further evaluated under three practical weightings: Balanced (50/50), Durability-prioritized (60/40), and Strength-prioritized (40/60). Results indicate that a 40% GGBFS replacement delivers the highest composite performance under balanced criteria, 20% is optimal for strength-driven applications, and 60–70% provides superior durability in aggressive environments, especially when activation or enhanced curing is applied. This study demonstrates the practical utility of an integrated PI approach for sustainable concrete design.
IMPACT OF POLYPROPYLENE MACRO FIBER ON MECHANICAL AND BOND STRENGTH IN SUPER-SULPHATED CEMENT CONCRETE Lucky Manuel; Herry Suryadi Djayaprabha
CRANE: Civil Engineering Research Journal Vol 7 No 1 (2026): CRANE - APRIL
Publisher : Program Studi Teknik Sipil, Fakultas Teknik dan Ilmu Komputer, Universitas Komputer Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34010/crane.v7i1.19746

Abstract

Super-sulphated cement concrete (SSC) has emerged as a promising low carbon binder system due to its high ground granulated blast furnace slag (GGBFS) content, however,par its mechanical performance is often limited by internal expansion, slow early hydration, and vulnerability to microcracking. Polypropylene macro fibers (PMF) have the potential to overcome these issues, but their influence on SSC particularly sulphate-activated systems has not been widely established. This study investigates the effects of PMF incorporation (0–1% by volume) on the mechanical performance, bond behavior, and microstructure of SSC activated using Sodium sulphate (Na₂SO₄) as sulfate activator and OPC as alkali activator. Compressive, flexural, and bond strength tests were conducted alongside ultrasonic pulse velocity (UPV) evaluations and microstructural analysis using XRD and SEM. The results demonstrate that PMF addition significantly enhances SSC performance. At 1% fiber content, compressive, flexural, and bond strengths improved by 20.41%, 55.31%, and 62.05%, respectively, compared with fiber-free SSC, accompanied by higher UPV values indicating a denser matrix. Microstructural observations confirmed the formation of C–S–H, ettringite, and portlandite, with improved matrix integrity in fibrous mixtures. These findings highlight the effectiveness of PMF in improving the structural performance and durability indicators of sulphate-activated slag concrete, offering practical insights for developing sustainable and fiber reinforced low carbon construction materials.
Mechanical and Durability Performance of Concrete with Optimized Aggregate Gradation: Binary-Ternary Dewar Versus Modified Andreasen-Andersen Models Lodgar Gabriel Mlodi; Herry Suryadi Djayaprabha; Brighton Tosha
Jurnal Media Teknik Sipil Vol. 24 No. 1 (2026): Februari 2026 (In Progress)
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jmts.v24i1.43779

Abstract

Aggregate gradation plays a critical role in mechanical and durability performance of concrete by governing packing density, paste demand, and material efficiency. However, conventional gradation standards permit wide particle size ranges that may result in suboptimal packing and inconsistent performance. This study evaluates three gradation optimization approaches Dewar’s Binary and Ternary models and Modified Andreasen–Andersen model to enhance concrete performance. The Dewar Ternary mixture was optimized to achieve maximum packing density at a water-to-cement ratio of 0.30 and a cement content of 514.7 kg/m³, which were then fixed for all mixtures. The Binary model considered only fine and coarse aggregates in the packing system, while the Ternary model incorporated cement as a third particle fraction. The Modified Andreasen–Andersen model employed a continuous power-law gradation (q = 0.28). Concrete performance was evaluated in terms of workability, strength, and durability. The Dewar ternary mixture exhibited the highest slump of 85 mm, achieved a 28-day compressive strength of approximately 34.0 MPa, and showed the lowest chloride penetrability of 4443 coulombs. The Modified Andreasen–Andersen mixture developed moderate strength of 30.5 MPa, while the binary mixture exhibited inferior workability and the lowest strength of approximately 23.8 MPa.
Pengaruh Molaritas Sodium Hidroksida terhadap Kekuatan Tekan dan Tarik Belah dari Alkali-activated Mortar Berbahan Dasar Feronikel Slag Kuncoro, Albert; Djayaprabha, Herry Suryadi
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 27, Nomor 2 (2021)
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (654.868 KB) | DOI: 10.14710/mkts.v27i2.32706

Abstract

The use of cement as the main binding agent in construction contributes approximately 7-10% in total of carbon dioxide gas emissions worldwide. In this study, the replacement of Portland cement using ground granulated ferronickel slag (GFNS) activated by the combination of sodium hydroxide (NaOH) dan sodium silicate (Na2SiO3) was utilized for producing alkali-activated mortar (AAM) as construction material. Four different mortar mixtures were prepared in this experimental work. There were three mixtures of ferronickel slag-based alkali activated mortar (FAM) with the variations of NaOH molarity of 6, 8, and 10M and cement-based mortar mixture (PCM) with water-to-cement ratio (w/c) of 0.5 was used as the control specimens. Overall, the flow and workability of the FAM specimen was lower than the PCM specimen due to the presence of silicate caused a sticky characteristic on the paste. On the other hand, the unit weight of FAM mortar was higher than the PCM specimen. Among all FAM mixtures, the most effective compressive strength and splitting tensile strength results were achieved by the FAM8 mixture, with a compressive strength at 28 days of 33.72 MPa and the splitting tensile strength at 28 days of 2.65 MPa, which had both good workability and chemical reaction of the material.
Co-Authors Anastasia Sri Lestari Andreas Onky Aswin Lim Brighton Tosha Darapuspa, Diana Fatharani, Ashila Hasya Felix Hidayat Helmy Hermawan Tjahjanto J Adhijoso Tjondro Jeffrey Mario Johannes Adhijoso Tjondro Joti, Sila Kuncoro, Albert Lodgar Gabriel Mlodi Lucky Manuel Mlodi, Lodgar Gabriel Nathanael Nathanael Oriana, Angie Samudra, Nenny Sisi Nova Rizkiani Steven Varian Lokanatha Wisena Perceka Yudhi Noer Cahya Wijayadi